Hiromune YOKOKIProfessor
■Researcher basic information
Organization
- College of Engineering Department of Urban and Civil Engineering
- Graduate School of Science and Engineering（Master's Program） Major in Urban and Civil Engineering
- Graduate School of Science and Engineerin（Doctoral Program） Major in Society's Infrastructure Systems Science
- Faculty of Applied Science and Engineering Domain of Urban and Civil Engineering
Research Areas
- Social infrastructure (civil Engineering, architecture, disaster prevention), Hydroengineering, Coastal and Environmental Engineering
- Social infrastructure (civil Engineering, architecture, disaster prevention), Civil engineering (environmental systems), Environmental impact assessment
- Social infrastructure (civil Engineering, architecture, disaster prevention), Hydroengineering, Hydraulic Engineering, River flood
- Social infrastructure (civil Engineering, architecture, disaster prevention), Hydroengineering, Hydraulic Engineering
- Environmental science/Agricultural science, Environmental impact assessment, Modeling and technologies for environmental conservation and remediation
- Environmental science/Agricultural science, Environmental load/risk assessment, Modeling and technologies for environmental conservation and remediation
- Environmental science/Agricultural science, Environmental impact assessment, Environmental impact assessment
Educational Background
Career
- Apr. 2018 - Present, 茨城大学教授 大学院理工学研究科（工学野）都市システム工学領域
- Apr. 2011 - Mar. 2018, Professor, Department of Urban and Civil Engineering, Ibaraki University
- Apr. 2010 - Mar. 2011, Associate Professor, Department of Urban and Civil Engineering, Ibaraki University
- Apr. 2007 - Mar. 2010, Associate Professor, Center for Water Environment Studies, Ibaraki University
- Oct. 1998 - Mar. 2007, Associate Professor, Center for Water Environmet Studies, Ibaraki University
- May 1997 - Sep. 1998, Lecturer, Center for Water Environmet Studies, Ibaraki University
- Jul. 1996 - Apr. 1997, Lecturer, Department of Urban and Civil Engineering, Ibaraki University
- Apr. 1991 - Jun. 1996, Research Associate, University of Tokyo
Member History
- Jun. 2022 - Present, 評議員・評議員会会長, 茨城県建設技術公社
- Jul. 2021 - Present, 行方市環境基本計画策定委員会, 行方市
- Jun. 2022 - Jun. 2024, 論文賞選考委員会委員, 公益社団法人土木学会
- Jun. 2023 - Mar. 2024, 気候変動適応関東広域協議会 議長兼アドバイザー, 環境省関東地方環境事務所
- Nov. 2022 - Mar. 2024, 那珂川水系河川整備計画フォローアップ委員会, 国土交通省関東地方整備局
- Dec. 2021 - Dec. 2023, 茨城県土木部公共事業等評価委員会委員, 茨城県
- Jun. 2021 - Jun. 2023, 地球環境委員会委員長, 土木学会
- Jun. 2021 - Jun. 2023, 土木学会論文集編集委員会G分冊編集小委員会, 土木学会
- Dec. 2021 - Mar. 2023, 久慈川河川計画フォローアップ委員会委員, 国土交通省関東地方整備局
- Feb. 2021 - Jan. 2023, 技術推進機構土木技術者資格委員会 上級土木技術者資格小委員会・特別上級土木技術者資格小委員会, 土木学会
- Dec. 2020 - Dec. 2022, 高萩市環境審議会委員, 高萩市
- Jun. 2021 - Jun. 2022, 土木学会論文集編集委員会G分冊編集小委員会委員長, 土木学会
- Jun. 2020 - Jun. 2022, 土木学会論文集編集委員会G分冊編集小委員会, 土木学会
- Sep. 2020 - Mar. 2022, 那珂川・久慈川水面利用協議会那珂川下流部会委員, 国土交通省関東地方整備局常陸河川国道事務所
- Aug. 2019 - Mar. 2021, 気候変動予測及び影響評価の連携推進に向けた検討チーム委員, 国立環境研究所
- 2019 - 2021, 論文集編集委員会編集調整会議委員, 土木学会
- 2019 - 2021, 論文集編集委員会B1・B2・B3分冊合同編集小委員会委員長, 土木学会
- 2019 - 2021, 地球環境委員会委員・副委員長, 土木学会
- 2017 - 2021, 理事・副会長, 日本沿岸域学会
■Research activity information
Award
- Jun. 2022, 令和3年度土木学会論文賞, Estimating the cost of coastal adaptation using mangrove forests against sea level rise, 公益社団法人 土木学会
熊野 直子,田村 誠,井上 智美,横木 裕宗
Japan society - Mar. 2022, JSCE GEE Award, 日本沿岸域を対象とした海面上昇による浸水予測と最新の社会経済シナリオ(SSP)を用いた経済評価, 土木学会地球環境委員会
大場真裕子(株式会社 安藤・間)・横木裕宗(茨城大学)・田村誠(茨城大学)
Japan society - Jun. 2009, 平成21年度日本沿岸域学会論文賞, 論文「ツバル国フナフチ環礁における沿岸土地被覆変化の解析」，沿岸域学会誌，vol.21, pp.21-31
桑原祐史;横木裕宗;佐藤大作;山野博哉;茅根創 - Jun. 2009, 平成21年度日本沿岸域学会論文賞, 論文「ツバル国フナフチ環礁における沿岸土地被覆変化の解析」，沿岸域学会誌，vol.21, pp.21-31
桑原祐史・横木裕宗・佐藤大作・山野博哉・茅根創 - 30 Aug. 2008, 平成19年度地球環境講演論文賞, 桑原祐史，横木裕宗，滑川卓也，佐藤大作，林利一，三村信男：Majuro環礁における国土の防護を目的としたゾーニングプロセスの構築，第15回地球環境シンポジウム講演論文集，pp.129-133, 2007.8
桑原祐史;横木裕宗;滑川卓也;佐藤大作;林利一;三村信男 - Aug. 2008, 平成19年度地球環境講演論文賞, 桑原祐史，横木裕宗，滑川卓也，佐藤大作，林利一，三村信男：Majuro環礁における国土の防護を目的としたゾーニングプロセスの構築，第15回地球環境シンポジウム講演論文集，pp.129-133, 2007.8
桑原祐史・横木裕宗・滑川卓也・佐藤大作・林利一・三村信男
Paper
- ESTIMATION OF COASTAL PROTECTION FACILITY HEIGHTS ALONG THE JAPANESE COAST CONSIDERING TSUNAMIS
Daisaku SATO; Hiromune YOKOKI, Last, Japan Society of Civil Engineers
Japanese Journal of JSCE, Mar. 2025, [Reviewed] - ASSESSING IMPACTS OF SEA LEVEL RISE AND THEIR IMPACTS ON GROSS REGIONAL PRODUCT FOR 47 PREFECTURES
Shuto IWAMA; Hiromune YOKOKI; Makoto TAMURA; Kohei IMAMURA, Corresponding, Japan Society of Civil Engineers
Japanese Journal of JSCE, Mar. 2025, [Reviewed] - ESTIMATION OF POTENTIAL ECONOMIC DAMAGE DUE TO SEA LEVEL RISE AND PROPOSALS FOR EFFECTIVE ADAPTATION THROUGH PROTECTION
Koki KODAMA; Hiromune YOKOKI; Makoto TAMURA; Kohei IMAMURA, Corresponding, Japan Society of Civil Engineers
Japanese Journal of JSCE, Mar. 2025, [Reviewed] - Author Correction: Dependence of economic impacts of climate change on anthropogenically directed pathways
Jun’ya Takakura; Shinichiro Fujimori; Naota Hanasaki; Tomoko Hasegawa; Yukiko Hirabayashi; Yasushi Honda; Toshichika Iizumi; Naoko Kumano; Chan Park; Zhihong Shen; Kiyoshi Takahashi; Makoto Tamura; Masahiro Tanoue; Koujiro Tsuchida; Hiromune Yokoki; Qian Zhou; Taikan Oki; Yasuaki Hijioka
Nature Climate Change, Apr. 2024 - 〔Major achievements〕日本沿岸域における地価を用いた海面上昇による浸水被害の経済評価
Kazuya UJIKE; Hiromune YOKOKI; Makoto TAMURA; Kohei IMAMURA, Corresponding, Japan Society of Civil Engineers
Japanese Journal of JSCE, Feb. 2024, [Reviewed] - ASSESSMENT OF THE IMPACT OF STRATIFICATION DEVELOPMENT BY CLIMATE CHANGE DURING THE SUMMER SEASON IN LAKE KASUMIGAURA
Daiki MATSUMOTO; Eiji MASUNAGA; Hiromune YOKOKI, Last, Japan Society of Civil Engineers
Japanese Journal of JSCE, Feb. 2024, [Reviewed] - 〔Major achievements〕ESTIMATING ADAPTATION COSTS TO SEA LEVEL RISE CONSIDERING COASTAL PROTECTION FACILITIES FOR JAPANESE COASTS
Koji YAMAMOTO; Hiromune YOKOKI; Makoto TAMURA; Kohei IMAMURA, Corresponding, Japan Society of Civil Engineers
Japanese Journal of JSCE, Feb. 2024, [Reviewed] - 〔Major achievements〕RESEARCH ON THE ESTIMATION METHOD OF COASTAL PROTECTION STRUCTURES HEIGHT ON THE COAST OF JAPAN
Daisaku SATO; Hiromune YOKOKI, Last, Japan Society of Civil Engineers
Japanese Journal of JSCE, Feb. 2024, [Reviewed] - 〔Major achievements〕日本沿岸域の海面上昇に対する住宅移転のシミュレーション
今村 航平・田村 誠 ・横木 裕宗, Last, 土木学会
土木学会論文集, 20 Oct. 2023, [Reviewed] - 〔Major achievements〕Total economic costs of climate change at different discount rates for market and non-market values
Takahiro Oda; Jun'ya Takakura; Longlong Tang; Toshichika Iizumi; Norihiro Itsubo; Haruka Ohashi; Masashi Kiguchi; Naoko Kumano; Kiyoshi Takahashi; Masahiro Tanoue; Makoto Tamura; Qian Zhou; Naota Hanasaki; Tomoko Hasegawa; Chan Park; Yasuaki Hijioka; Yukiko Hirabayashi; Shinichiro Fujimori; Yasushi Honda; Tetsuya Matsui; Hiroyuki Matsuda; Hiromune Yokoki and Taikan Oki, What will be the aggregated cost of climate change in achieving the Paris Agreement, including mitigation, adaptation, and residual impacts? Several studies estimated the aggregated cost but did not always consider the critical issues. Some do not address non-market values such as biodiversity and human health, and most do not address differentiating discount rates. In this study, we estimate the aggregated cost of climate change using an integrated assessment model linked with detailed-process-based climate impact models and different discount rates for market and,non-market values. The analysis reveals that a climate policy with minimal aggregated cost is sensitive to socioeconomic scenarios and the way discount rates are applied. The results elucidate that a lower discount rate to non-market value—that is, a higher estimate of future value—makes the aggregated cost of achieving the Paris Agreement economically reasonable., IOP Publishing Ltd
Environmental Research Letters, 01 Aug. 2023, [Reviewed] - 〔Major achievements〕Assessing the effectiveness of adaptation against sea level rise in Japanese coastal areas: protection or relocation?
Makoto Tamura; Kohei Imamura; Naoko Kumano; Hiromune Yokoki, Last, Sea level rise (SLR) due to climate change poses a serious threat to human populations in coastal areas. As a result, assessing the impacts of SLR and evaluating potential adaptations is essential. This study assesses the impacts of SLR and ocean tides on coastal Japanese prefectures by estimating the extent of potentially inundated areas, affected populations, and economic damages. The latest climate scenarios, tidal data, and shared socioeconomic pathways (SSPs) are used to estimate the SLR and its inundation effects at a resolution of 1 km. Economic damages are estimated following the methods outlined in the “Manual for economic evaluation of flood control investment (draft).” It was found that all impacts (inundated areas, affected populations, and economic damages) under RCP2.6-SSP1 are significantly smaller than those under RCP8.5-SSP5, suggesting the importance of mitigation efforts. In addition, the study evaluates the cost and effectiveness of protection and relocation adaptations using data on the cost of constructing dikes and the cost of relocating houses and infrastructure. While relocations due to SLR have not yet been undertaken in Japan, the relocation costs could be estimated based on the conventional scheme of community relocation for natural disasters such as life-threatening floods and tsunamis caused by major earthquakes. It was found that the costs of relocation can exceed those of protection under the current framework of Japanese relocation policies., Springer
Environment, Development and Sustainability, 20 Jul. 2023, [Reviewed] - 〔Major achievements〕Global survey shows planners use widely varying,sea-level rise projections for coastal adaptation
Daniella Hirschfeld; David Behar; Robert J. Nicholls; Niamh Cahill; Thomas James; Benjamin P. Horton; Michelle E. Portman; Rob Bell; Matthew Campo; Miguel Esteban; Bronwyn Goble; Munsur Rahman; Kwasi Appeaning Addo; Faiz Ahmed Chundeli; Monique Aunger; Orly Babitsky; Anders Beal; Ray Boyle; Jiayi Fang; Amir Gohar; Susan Hanson; Saul Karamesines; M. J. Kim; Hilary Lohmann; Kathy McInnes; Nobuo Mimura; Doug Ramsay; Landis Wenger & Hiromune Yokoki, Including sea-level rise (SLR) projections in planning and implementing coastal adaptation is crucial. Here we analyze the first global survey on the use of SLR projections for 2050 and 2100. Two-hundred and fifty-three coastal practitioners engaged in adaptation/planning from 49 countries provided complete answers to the survey which was distributed in nine languages – Arabic, Chinese, English, French, Hebrew, Japanese, Korean, Portuguese and Spanish. While recognition of the threat of SLR is almost universal, only 72% of respondents currently utilize SLR projections. Generally, developing countries have lower levels of utilization.,There is no global standard in the use of SLR projections: for locations using a,standard data structure, 53% are planning using a single projection, while the remainder are using multiple projections, with 13% considering a low-probability high-end scenario. Countries with histories of adaptation and consistent national support show greater assimilation of SLR projections into adaptation decisions. This research provides new insights about current planning practices and can inform important ongoing efforts on the application of the science that is essential to the promotion of effective adaptation., Nature Portfolio
COMMUNICATIONS EARTH & ENVIRONMENT, 03 Apr. 2023, [Reviewed] - 〔Major achievements〕ESTIMATING ADAPTATION COSTS TO SEA LEVEL RISE USING COASTAL STRUCTURES ON JAPANESE COASTS
Jun’ya MIYAMOTO and Hiromune YOKOKI, Last, 土木学会
土木学会論文集G（環境）, 31 Aug. 2022, [Reviewed] - 〔Major achievements〕ASSESSING SOCIOECONOMIC IMPACTS OF SEA LEVEL RISE ON JAPANESE COASTS VIA SCENARIOS OF POPULATION AND LAND USE
Koki KODAMA; Hiromune YOKOKI and Makoto TAMURA, Corresponding, 土木学会
土木学会論文集Ｇ（環境）, 31 Aug. 2022, [Reviewed] - 〔Major achievements〕COST ESTIMATION FOR RESIDENTIAL RELOCATION IN ADVANCE OF SEA LEVEL RISE IN JAPANESE COASTAL AREAS
Kohei IMAMURA; Makoto TAMURA; and Hiromune YOKOKI, Last, 土木学会
土木学会論文集Ｇ（環境）, 31 Aug. 2022, [Reviewed] - 〔Major achievements〕SPECIAL ISSUE ON THE JULY 2020 HEAVY RAINFALL EVENT IN JAPAN
横木 裕宗; 内田 龍彦; 稲垣 厚至; 塚井 誠人; 瀬戸 心太; 横嶋 哲; 吉川 泰弘; 椿 涼太; 斉木 功, Lead, 令和2年7月，九州地方では4日から7日にかけて記録的な大雨となり，球磨川や筑後川では記録的な洪水が発生した．その後も西日本から東北地方の広い範囲で大気が不安定となり，江の川，最上川など大河川においても氾濫が相次いだ．近年では，毎年のように記録的な豪雨災害が発生しており，降雨強度だけでなく降雨のスケールが時空間的に大きくなっており，被害が時空間的に拡大している．さらに，令和2年度は新型コロナウィルスによる感染症対策のため，人々の活動が制限される中での災害となった．災害調査データを取り纏め，情報発信することは今後の持続可能な社会を検討する上で不可欠である．土木学会論文集では，災害情報を共有・発信し，防災に関する技術および学術分野の進展に資するために令和2年7月豪雨災害に関する特集を企画した．, 土木学会
土木学会論文集B1（水工学）, 20 Dec. 2021, [Invited] - 〔Major achievements〕日本沿岸域を対象とした海面上昇による浸水予測と最新の社会経済シナリオ(SSP)を用いた経済評価
大場 真裕子・横木 裕宗・田村 誠, Corresponding, 気候変動に伴う海面上昇等は沿岸域に大きな影響を及ぼすため，適応策の策定・実施に向けてその社会経済評価は必須である．本研究では，日本沿岸域を対象として，海面上昇と潮汐による各都道府県の潜在的な浸水面積，影響人口，浸水被害額といった浸水影響を定量化した．最新の気候シナリオ，潮汐データ，社会経済シナリオ(SSP)を活用して，日本沿岸域の海面上昇と浸水影響を3次メッシュ(1km)の解像度で全国一律に評価したことが特徴である．その結果，代表的濃度経路のうちRCP8.5における全国の潜在的浸水面積は，2050年に約2,127 km2，2100年に約2,598 km2になると推計された．影響人口は2050年に約461万人-551万人 (SSP1-5)，2100年に約253万人-565万人 (SSP1-5)となり，浸水被害額は2050年に約400億US$-644億US$ (SSP1-5)，2100年に約580億US$-1,850億US$ (SSP1-5)と推計された．さらに，人口の密集する都市部や地形条件など，都道府県沿岸の特徴についても検証した．, 土木学会
土木学会論文集G（環境）, 27 Sep. 2021, [Reviewed] - 〔Major achievements〕Estimating the cost of coastal adaptation using mangrove forests against sea level rise
Kumano; N.; M. Tamura; T. Inoue; and H. Yokoki, Last, Sea level rise due to climate change poses a serious threat to human populations in coastal areas. In planning possible countermeasures, it is important to consider the potential economic risks and the cost of any proposed adaptation. This paper examines the cost effectiveness of adaptation measures that combine mangrove afforestation (green infrastructure) and dike construction (gray infrastructure) in areas considered to be at risk of inundation. Based on data for 112 countries and regions where mangrove forests are present along the coastline, the global benefit/cost ratio for the combination of dikes and mangrove is approximately 1.5 times higher than the ratio for dike-only protection. It was found that this type of multiple protection scheme can reduce the number of dikes required and the overall cost of adaptation., Taylor and Francis
Coastal Engineering Journal, 25 Jul. 2021, [Reviewed] - To Deliver Climate Change Projection Information to Users
TAKAYABU Izuru; NAKAKITA Eiichi; NISHIMORI Motoki; HASHIZUME Masahiro; HATSUSHIKA Hiroaki; MATSUI Tetsuya; YAMANO Hiroya; YOKOKI Hiromune; WATANABE Masahiro; HANASAKI Naota; SHIOGAMA Hideo; ISHIKAWA Yoichi; EMORI Seita; SHIMADA Tomohide; SUGISAKI Hiroya; TAKAHASHI Kiyoshi; NAKAEGAWA Toshiyuki,Over the past twenty years, vast amounts of quantitative and qualitative information have been created on climate change and its impact on society. However, various issues still remain until such information can be widely utilized by national and local governments and enterprises. Here, the authors, who have long been involved in research on climate projection and impact assessment, discussed various obstacles that are currently seen and clues to the solution. As a result, the communities of climate projection, impact assessment, and users have their own premises and expectations for other communities, hence there is a gap between them. For the solution, it is important to collaborate among the communities of climate projection, impact assessment, and users. Specifically, it was shown that it is necessary to improve mutual information exchange and coordination before the information is created, and to develop the institution and facilities for realizing it.
, THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES, 2021 - 〔Major achievements〕SPECIAL ISSUE ON THE STORM AND FLOOD DAMAGE 2019 IN JAPAN
Hiromune YOKOKI; Tatsuhiko UCHIDA; Yoshihisa AKAMATSU; Shinta SETO; Shinichiro ONDA; Tomohito YAMADA; Satoshi NISHIMURA; Taichi TEBAKARI; Chikako FUJIYAMA; Hiroyuki SAKAKIBARA; Yoshinori SHIGIHARA and Satoshi YOKOJIMA, Lead, In 2019, the Kanto-Koshin area and the Tohoku area suffered devastating damages from floods and sed-iment disasters caused by the record-breaking heavy rainfall with Typhoon No. 19 (Hagibis). In the same year, the heavy rainfall caused severe damage in northern part of Kyushu-Island such as Saga Prefecture, as well as the wind and rain disaster caused by Typhoon No. 15 (Faxai) in Chiba Prefecture. These disasters also highlighted the danger of a series of disaster factors that could cause extensive damage in large areas with the combinations. It is one of the missions of JSCE to compile and disseminate lessons from disasters in Japan for solving future challenging issues in managing infrastructures and mitigating disaster damages. This special issue on the storm and flood damage 2019 in Japan includes valuable information of the dis-asters in 2019 from different disciplinary points of view, aiming to contribute the growth and development of interdisciplinary academic fields of civil and environmental engineering., Japan Society of Civil Engineers
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 02 Nov. 2020, [Reviewed], [Invited] - 〔Major achievements〕Cost analysis of multiple protection measures incorporation green infrastructure in coastal areas
熊野直子; 田村誠; 井上智美; 横木裕宗, 土木学会
土木学会論文集G（環境）, Sep. 2020, [Reviewed] - Dependence of economic impacts of climate change on anthropogenically directed pathways (vol 9, pg 737, 2019)
Takakura, Jun'ya; Fujimori, Shinichiro; Hanasaki, Naota; Hasegawa, Tomoko; Hirabayashi, Yukiko; Honda, Yasushi; Iizumi, Toshichika; Kumano, Naoko; Park, Chan; Shen, Zhihong; Takahashi, Kiyoshi; Tamura, Makoto; Tanoue, Masahiro; Tsuchida, Koujiro; Yokoki, Hiromune; Zhou, Qian; Oki, Taikan; Hijioka, Yasuaki, NATURE PUBLISHING GROUP
NATURE CLIMATE CHANGE, Nov. 2019 - Dependence of economic impacts of climate change on anthropogenically directed pathways
Takakura, Jun'ya; Fujimori, Shinichiro; Hanasaki, Naota; Hasegawa, Tomoko; Hirabayashi, Yukiko; Honda, Yasushi; Iizumi, Toshichika; Kumano, Naoko; Park, Chan; Shen, Zhihong; Takahashi, Kiyoshi; Tamura, Makoto; Tanoue, Masahiro; Tsuchida, Koujiro; Yokoki, Hiromune; Zhou, Qian; Oki, Taikan; Hijioka, Yasuaki, There are great uncertainties in the projected economic impacts of climate change(1), arising from uncertainties in the climate response(2), the climate change mitigation pathway(3) and the socioeconomic development pathway(4). Although the relative contributions of these factors are important for climate change related decision-making, they are poorly understood. Here, we show to what extent the projected economic impacts of climate change can be attributed to these three factors. Our modelling framework consisting of global, multisectoral impact models coupled with an integrated assessment model enables us to estimate the global total economic impacts of climate change while incorporating these uncertainty sources. Whereas the most pessimistic pathway without mitigation would result in a net economic impact equivalent to 6.6% (3.9-8.6%) of global gross domestic product at the end of this century, the pathways with stringent mitigation would limit the impact to around or less than 1%. Although the uncertainties are great, the climate change mitigation pathway is the dominant factor and socioeconomic developments can also contribute to alleviate the impacts of climate change. These results suggest that decisions on mitigation and development have a great influence in determining the economic impacts of climate change, regardless of the uncertainties in the climate response., NATURE PUBLISHING GROUP
NATURE CLIMATE CHANGE, Oct. 2019, [Reviewed] - Global assessment of the effectiveness of adaptation in coastal areas based on RCP/SSP scenarios
Tamura,M; M.Yotsukuri; N.Kumano; H.Yokoki
Climatic Change, 05 Jan. 2019, [Reviewed] - Global assessment of the effectiveness of adaptation in coastal areas based on RCP/SSP scenarios
Makoto Tamura; Naoko Kumano; Mizuki Yotsukuri; Hiromune Yokoki, Last, The objective of this study is to assess the global impact of sea level rise and to evaluate the effectiveness of adaptation. Global areas of inundation due to sea level rise are identified. The affected populations and the economic damage caused by inundation due to future climate change are estimated for a number of scenarios involving Representative Concentration Pathways (RCP) and Shared Socioeconomic Pathways (SSP). The effects of adaptation in coastal areas, specifically the effects of elevating dikes, are evaluated. According to study results, dikes 1 m in height may reduce the total inundated area by approximately 40% below the no-adaptation baseline under the same RCP. The cost of adaptation was estimated using an original cost database to establish the cost of protection in future socioeconomic scenarios. It was found that the incremental adaptation cost was less than the economic damage in almost all cases of RCP/SSP, providing an incentive to take action to respond to climate change., Springer Netherlands
Climatic Change, 05 Jan. 2019, [Reviewed] - INUNDATION IMPACTS DUE TO SEA LEVEL RISE AND THE ADAPTATION ASSESSMENTS FOR COASTAL PROTECTION
TSUCHIDA Koujiro; TAMURA Makoto; KUMANO Naoko; YOKOKI Hiromune, Corresponding,Inundation impacts due to sea level rise caused by climate change were assessed globally using multiple global climate model outputs. In particular, the assessment accuracy was improved by upgrading the data for coastlines according to a method previously proposed by the authors. As a result, 750 − 820 × 103 km2 of coastal land was estimated to be inundated globally by 2100 under Representative Concentration Pathway 8.5. A new method for estimating the adaptation cost by building coastal dikes was applied, and economic damage and adaptation costs were compared under several adaptation scenarios. If all global inundation were avoided only by building coastal dikes, the adaptation cost was estimated to be six times as much as the inundation damage cost at the end of this century. This study's consideration of the adaptation options against global inundation suggested that multiple options, such as "green infrastructure" and other accommodations, should be implemented.
, Japan Society of Civil Engineers
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 2019, [Reviewed] - EXAMINING IMPACT AND EFFECTIVENESS OF COASTAL ADAPTATION USING GREEN INFRASTRUCTURE AGAINST SEA LEVEL RISE
KUMANO Naoko; TAMURA Makoto; YOKOKI Hiromune, Last,Sea level rise due to climate change may threaten humans living near coastal areas. To adapt to climate change, it is important to examine the effectiveness and cost of coastal protection. Coastal areas can be protected more efficiently and economically using both green and gray infrastructure, such as mangroves and sea dikes, along the coastline. However, few studies have examined the long-term feasibility and impact of adaptation measures at a global scale. Therefore, this study carried out an impact assessment of inundation and a cost analysis of such measures, focusing on 112 countries and regions containing mangrove forests. It was found that combining mangrove forests and dikes could be potentially effective in the global aggregates. However, the national feasibility of such measures depends on the country, which requires site-specific management solutions to accommodate local conditions.
, Japan Society of Civil Engineers
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 2019, [Reviewed] - Pollutant advection and diffusion processes in the lagoon of Funafuti Atoll, Tuvalu
Daisaku Sato; Hiromune Yokoki, American Society of Civil Engineers (ASCE)
Proceedings of the Coastal Engineering Conference, 2018 - 衛星画像と数値表層モデルを用いた海岸堤防抽出手法の提案
熊野直子; 川嶋良純; 箭内春樹; 田村誠; 横木裕宗; 桑原祐史, 日本沿岸域学会
沿岸域学会誌, 2018, [Reviewed] - フィリピン・ベトナムにおけるグリーンインフラの海面上昇への適応評価と費用効果
熊野直子; 田村誠; 井上智美; 横木裕宗, Last, 土木学会
土木学会論文集G（環境）, 2018, [Reviewed] - フナフチ環礁フォンガファレ島における海面上昇が越波・浸水・タロ栽培に与える影響
佐藤大作; 桑原祐史; 横木裕宗, Last, 土木学会
土木学会論文集G（環境）, 2018, [Reviewed] - 複数気候モデルによる海面上昇に伴う浸水影響の不確実性評価
土田晃次郞; 田村誠; 熊野直子; 増永英治; 横木裕宗, Last, 土木学会
土木学会論文集G（環境）, 2018, [Reviewed] - Global distribution of projected sea level changes using multiple climate models and economic assessment of sea level rise
Yokoki; H.; M.Tamura; M.Yotsukuri; N.Kumano; Y.Kuwahara, Lead
CLIVAR Exchanges, 2018, [Reviewed], [Invited] - 珊瑚礁環礁内における流動構造と物質輸送過程の解明
小池 海; 増永 英治; 横木 裕宗, Last, ツバル国フナフチ環礁ラグーン内における汚濁物質を想定した都市起源物質の輸送過程を海洋数値計算により明らかにした．ラグーン内では，吹送流によって上下層で異なる複雑な流動場が形成されていた．都市起源の物質のラグーン内の輸送フラックスから，夏季は卓越する北西からの風によりラグーン南側の環礁の切れ目から都市起源物質が強く流出していた．一方南東からの風が卓越する冬季は，ラグーン北側からの物質の流出が顕著に現れていた．汚濁物質のラグーン内残留量から，都市起源物質は冬季夏季ともに10日程度でラグーン外への排出が始まり，排出量は風況の強く影響を受けていた．また水質汚濁対策として，人工的にモデル内に新たな環礁の切れ目を設けることにより，冬季はラグーン内の都市起源物質量を9 %程度削減できる可能性が示唆された．, 土木学会
土木学会論文集B2(海岸工学), 2018, [Reviewed] - 伊勢湾台風を事例とする高潮浸水被害額推計手法の検証
箭内春樹; 熊野直子; 田村誠; 横木裕宗; 桑原祐史, 土木学会
土木学会論文集G（環境）, Sep. 2017, [Reviewed] - RCP・SSPシナリオに基づく全球沿岸域での海面上昇による浸水影響評価
四栗瑞樹; 田村誠; 熊野直子; 増永英治; 横木裕宗, Last, 土木学会
土木学会論文集G（環境）, Sep. 2017, [Reviewed] - 日本における海面上昇への適応を目的とした防護費用の将来推計
熊野 直子; 土田 晃次郎; 田村 誠; 増永 英治; 桑原 祐史; 横木 裕宗, Last, Sea level rise due to climate change may threaten those who live near the coastal area. It is important to examine the cost of coastal protection in the context of climate change and its adaptation. This paper constructed the database of installed cosatal protection around the world, and it tried to estimate the future cost of protection such as constructing new dykes and elevating them in Japan, baesd on SSP scenarios. It is feasble to install new dyke along the major coasts if the related budget keeps a certain level. However, the combination of constructing new dykes and elevating them enables us to cut down more protection cost., 土木学会
土木学会論文集B3（海洋開発）, Jun. 2017, [Reviewed] - GLOBAL IMPACT ASSESSMENT OF SEA LEVEL RISE BASED ON RCP/SSP SCENARIOS
四栗 瑞樹; 田村 誠; 熊野 直子; 増永 英治; 横木 裕宗, 土木学会
地球環境研究論文集 = Global environment engineering research : 地球環境シンポジウム, 2017 - ツバル国フナフチ環礁ラグーンの効果的な汚濁改善対策に関する数値計算
佐藤大作; 横木裕宗, Last, Numerical simulations for implementation of efficient countermeasure against lagoonal pollution in Funafuti Atoll of Tuvalu were conducted in this study. In the simulation the spatial differences of pollutant outflow were estimated by using the houses distribution. Fongafale Island was divided into the three areas where countermeasure was implemented, and the six countermeasure scenarios were considered in total. Pollutant volume was estimated in six small regions that covered whole of Funafuti Atoll. Effective countermeasure case was different in the small regions. Thus, appropriate selection of the target region of pollution reduction enables to decreasing number of houses which implement the countermeasure. Countermeasure efficiency parameter indicated that the countermeasure in the middle of Fongafale Island where has high density of houses had high efficiency for reducing the pollution., 土木学会
土木学会論文集B2（海岸工学）, Nov. 2016, [Reviewed] - フナフチ環礁における移流拡散解析と汚濁物質の除去による水質保全対策
朝原大貴; 江口三希子; 佐藤大作; 藤田昌史; 横木裕宗, Last, 土木学会
土木学会論文集G（環境）, Sep. 2016, [Reviewed] - Coastal adaptation to climate change in Vietnam and Japan: A socioeconomic analysis
Tamura; M.; N. Kumano; H. Yokoki; Y. Kuwahara; and K. Yasuhara
Proceedings of Hanoi Geoengineering 2016 on Energy & Sustainability, 2016 - Climate change and resilient adaptation in coastal areas, Vietnam
Tamura; M.; K. Yasuhara; N. Kumano; H. Yokoki; and Y. Kuwawaha
Proceedings of International Conference on Building Sustainable Development Society: Vietnam-Japan Cooperation to Ensure the Sustainable Development, 2016 - 広領域を対象とした氾濫シミュレーションの精度向上を目的とする簡易なDSM補間方法の提案
川嶋良純; 桑原祐史; 横木裕宗, Last, 日本沿岸域学会
沿岸域学会誌, Dec. 2015, [Reviewed] - フナフチ環礁ラグーンにおける汚濁物質の移流分散特性
佐藤 大作; 横木 裕宗; 有田 正光, This study conducted the numerical simulation of pollutant advection and dispersion in Funafuti Atoll of Tuvalu in order to identify the characteristic of lagoonal pollutant behavior. Simulated results of the monthly initialized condition of pollutant distribution indicated that the pollutant flowing out from the nearshore of Fongafale Island was transported to the west-side of the atoll. Characteristics of the transported pollutant increasing are different between north-western and south-western part of the atoll. In July and August the pollutant increased rapidly in the latter half of the month. The year-long simulation, which was conducted for considering the retention of pollutant, indicated that the retention areas were formed in the offshore of Fongafale Island. Additionally, the south-western part of the atoll was the retention area from the end of July. It was estimated that the pollutant source of retention area in the south-western part of the atoll was the another retention area which formed in the offshore of Fongafale Island., 土木学会
土木学会論文集B2(海岸工学), Nov. 2015, [Reviewed] - ツバル国フナフチ環礁ラグーンの流動特性に関する数値計算
佐藤大作; 横木裕宗; 有田正光, Numerical simulation of the lagoonal currents and virtual particles advection was conducted in order to estimate the characteristics of the water pollution in the lagoon of Funafuti Atoll, Tuvalu. Comparison of the calculated current velocity and water surface elevation and the observed data showed good agreement. The calculated lagoonal currents showed that surface currents were driven by wind. On the reef-flat, the currents were formed by combined influences with wind and tide. Numerical simulation of virtual particles advection indicated that the particles which were installed in the nearshore of Fongafare Island were transported to the west-side of the atoll through a year. In the non-trade-wind season, the high retention of installed particles was calculated in the lagoon., Japan Society of Civil Engineers
土木学会論文集B2（海岸工学）, Nov. 2014, [Reviewed] - Simulations of coral gravel accumulation in the open-cut causeway in fongafale islet of Funafuti Atoll, Tuvalu
Daisaku Sato; Hiromune Yokoki, Numerical simulations of coral gravel transportation were conducted to estimate the accumulation possibility in the gap which is formed by the open-cutting of the causeway in Fongafale Islet of Funafuti Atoll. In the numerical simulation of wave field, the high wave conditions were considered in the boundary condition. Calculated morphological change in the gap showed that the extremely large accumulation of coral gravels was not estimated. However the southern edge of the gap had large accumulation locally. In the middle and northern part of the gap accumulated gravel formed thin layer. Because the calculated morphological change of lower wave condition showed large accumulation as well as the results of higher wave condition, it is estimated that the direction of incident wave is important factor of the accumulation. The simulated result indicated that the rapid blockade of the gap would not be caused by accumulation of coral gravels. However, the periodic maintenance of the gap is required for keeping the function of the gap continuously., American Society of Civil Engineers (ASCE)
Proceedings of the Coastal Engineering Conference, 2014 - Heavy metal contamination of coastal lagoon sediments: Fongafale Islet, Funafuti Atoll, Tuvalu
Fujita; M.; Y. Ide; D. Sato; P. S. Kench; Y. Kuwahara; H. Yokoki; and H. Kayanne, To evaluate contamination of coastal sediments along Fongafale Islet, Central Pacific, a field survey was conducted in densely populated, sparsely populated, open dumping and undisturbed natural areas. Current measurements in shallow water of the lagoon indicated that contaminants from the densely populated area would only be transported for a small proportion of a tidal cycle. Acid-volatile sulfides were detected in both the intertidal beach and nearshore zones of the densely populated area, whereas these were no detection in the other areas. This observation lends support to argument that the coastal pollution mechanism that during ebb tide, domestic wastewater leaking from poorly constructed sanitary facilities seeps into the coast. The total concentrations of Cr, Mn, Ni, Cu, Zn, Cd and Pb were relatively high in all of the areas except the undisturbed natural area. The indices of contamination factor, pollution load index and geoaccumulation index were indicative of heavy metal pollution in the three areas. The densely populated area has the most significant contamination; domestic wastewater led to significant contamination of coastal sediments with Cr, Zn, Cu, Pb and Cd. The open dumping area is noteworthy with respect to Mn and Ni, which can be derived from disposed batteries. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved., PERGAMON-ELSEVIER SCIENCE LTD
Chemosphere, 2014, [Reviewed] - 海面水位の季節変化を考慮した海面上昇リスクの全球分布
横木裕宗; 中村円; 佐藤大作; 桑原祐史; 河宮未知, Lead
土木学会論文集B2(海岸工学), Nov. 2013, [Reviewed] - Anthropogenic impacts on water quality of the lagoonal coast of Fongafale Islet, Funafuti Atoll, Tuvalu
Masafumi Fujita; Jumpei Suzuki; Daisaku Sato; Yuji Kuwahara; Hiromune Yokoki; Hajime Kayanne, Water pollution, evident by negative values of redox potential in waters, occurs at the lagoonal coast located near the densely populated area of Fongafale Islet on Funafuti Atoll, Tuvalu, Central Pacific. Sediment microbial quinone analysis revealed that these coastal sediments exhibit 2.7-10.4 times more microbial biomass, significantly different microbial community structure and low microbial diversity, when compared to an undisturbed natural coastal sediment. Thus, the pollution is chronic. By considering the total land use/coverage on the islet, the situation of septic tank installations, temporal changes in water redox potential and Escherichia coli numbers in the coastal waters and the spatial distribution of acid volatile sulfide in the sediments, we conclude that domestic wastewater is the primary source of pollution. This pollution is proposed to occur via the following mechanism: during ebb tides, domestic wastewater leaking from bottomless septic tanks and pit toilets run off into the lagoonal coast. Tide changes control the pollution load of domestic wastewater., SPRINGER JAPAN KK
SUSTAINABILITY SCIENCE, Jul. 2013, [Reviewed] - Improvement of sediment transport by excavation of causeway in Funafuti Atoll, Tuvalu
D. Sato; H. Yokoki; H. Kayanne
Proceedings of the Coastal Engineering Conference, 2012 - マーシャル諸島共和国マジュロ環礁を対象とした国土防護のための対策優先地区選定方法の提案
江田雄樹; 桑原祐史; 佐藤大作; 藤田昌史; 横木裕宗, Last, 日本沿岸域学会
沿岸域学会誌, 2012, [Reviewed] - ツバル国フナフチ環礁を対象とした海岸植生の調査
桑原祐史; 横木裕宗, Last, The objective of this study is to investigate land cover around the shoreline, and the geographical feature conditions of coastal vegetation growing on Funafuti Atoll, Tuvalu. In order to maintain the living environment of the South Pacific islands countries, sea-level rise is a serious problem. Thus, in this study, analyzed was the relation of land cover of shoreline area and hinterland by using aerial photograph (1984) and satellite image (2004). Then, geographical feature conditions of the coastal vegetation growing under natural condition were surveyed, and it was found that the coastal vegetation was growing in the altitude of about 2.2m., Center for Environmental Information Science
環境情報科学学術研究論文集, 2012, [Reviewed] - 最新気候シナリオデータを用いた海面上昇量と海面上昇リスクの全球分布
横木裕宗; 根本麻衣; 桑原祐史; 佐藤大作; 岡島秀樹; 河宮未知生, Lead
土木学会論文集B2（海岸工学）, 2012, [Reviewed] - ツバル国フナフチ環礁ラグーン海岸における生活排水の流出機構
藤田昌史; 井上龍太郎; 佐藤大作; 桑原祐史; 横木裕宗, Last
土木学会論文集G（環境）, 2012, [Reviewed] - 環礁州島のサンゴ礫堆積地形の変化機構の解明
佐藤大作; 横木裕宗; 桑原祐史; Ane Talia; 山野博哉; 茅根創
土木学会論文集G（環境）, 2012, [Reviewed] - Damage from the Great East Japan Earthquake and Tsunami - A quick report (vol 16, pg 803, 2011)
Nobuo Mimura; Kazuya Yasuhara; Seiki Kawagoe; Hiromune Yokoki; So Kazama, SPRINGER
MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE, Dec. 2011 - Damage from the Great East Japan Earthquake and Tsunami - A quick report
Nobuo Mimura; Kazuya Yasuhara; Seiki Kawagoe; Hiromune Yokoki; So Kazama, The Tohoku region, Northeast Japan, was hit by a gigantic earthquake which occurred in the Pacific close to Tohoku, and subsequently by a giant tsunami. These hazards have caused huge damage on the eastern coast Japan. The earthquake's magnitude was 9.0, the strongest ever recorded in Japan. The tsunami was also historical as its run-up height reached over 39 m. As of early May, 2011, over 24 thousand people were reported as dead or missing. Moreover, serious accidents at the Fukushima Nuclear Power Plants No. 1 were caused by the effects of the tsunami. Therefore, the damage faced by Japanese people can be seen as a giant composite disaster. Although Japan, and the northeast of Japan in particular, has over a long time period increased its preparedness against earthquakes and tsunamis, huge damage still occurred. This paper considers why this tragedy occurred, and what unrecognized factors contributed to the high vulnerability of the area. To assist in answering such questions, this paper presents a timely report of the features of the earthquake and tsunami, the damage they caused, and the early efforts for recovery and reconstruction., SPRINGER
Mitigation and Adaptation Strategies for Global Change, 2011 - Effects of climate change on coastal disasters: new methodologies and recent results
Kazuya Yasuhara; Hideo Komine; Hiromune Yokoki; Takeshi Suzuki; Nobuo Mimura; Makoto Tamura; Guangqi Chen, Humanity faces an increasing possibility that unusual and extreme natural disasters will increase, compounded with climate change, including global warming. These compound events are designated as compounded natural hazards in this study. A methodology must be developed for predicting what events and risks will confront future societies, to propose countermeasures and adaptation strategies against these events, and to evaluate the influences of compound disasters on infrastructure which is particularly situated near coasts and rivers. Based on the above-stated background and demands, this study was undertaken with the intention of upgrading the methodology for estimating effects on infrastructure of compound events such as increased typhoon and rainfall severity caused by global warming occurring concurrently with a great earthquake in Japan. Such a methodology is expected to contribute to progress in the fields of natural disaster mitigation and land preservation, particularly benefiting coastal and river areas in Japan. Additionally in this study, risk and economic loss analyses for the possible occurrence of compound disasters for coastal infrastructure and foundations are produced for establishing environmental strategies at the governmental level. The authors further propose adaptation strategies and techniques as countermeasures against these events., SPRINGER TOKYO
Sustainability Science, 2011, [Reviewed] - コーズウェイ開削による環礁州島の持続的な州島保全の可能性
佐藤大作; 横木裕宗; 茅根創
土木学会論文集G（環境）, 2011, [Reviewed] - 南太平洋島嶼国を対象とした国土の防護のための対策優先地区選定に用いる地理情報の高度化
桑原祐史; 中野貴聡; 江田雄樹; 横木裕宗; 藤田昌史; 佐藤大作
土木学会論文集G（環境）, 2011, [Reviewed] - ツバル国フナフチ環礁のラグーン海岸における水質汚濁
藤田昌史; 佐藤大作; 桑原祐史; 横木裕宗
土木学会論文集G（環境）, 2011, [Reviewed] - 環礁州島ラグーン側砂浜海岸における地形変化機構の現地調査
佐藤大作; 横木裕宗; Ane Talia
土木学会論文集B2（海岸工学）, 2011, [Reviewed] - Numerical calculation on shoreline conservation in Majuro atoll, the Marshall Islands
Daisaku Sato; Hiromune Yokoki, Development of a numerical model for future estimation of morphological changes in Majuro atoll were carried out, and, at the same time, examination of beach nourishment for sustainable island conservation plan was examined by the developed model. Identified erosion and accretion area from calculated shoreline indicated that the northern tip of Laura and some areas in LongIsland had severe erosion until 100 years later as well as large accretion in northern part of the atoll. Three beach nourishment scenarios using eroded sediments, which were accreted in deep lagoon in northern part of atoll, were examined and they decreased 30% of accumulative erosion volume compared with the non-conservation result. This result shows that the beach nourishment is an effective option to sustainable island conservation plan in Majuro atoll.
Proceedings of the Coastal Engineering Conference, 2010 - ツバル国フナフチ環礁における台風がラグーン内波浪場に及ぼす影響
佐藤大作; 横木裕宗; 櫻井勝; 桑原祐史, Tropical cyclone "Gavin" caused extremely high wave situation in Funafuti atoll, Tuvalu on March 1997. Although the extremely high waves due to tropical cyclones caused large morphological changes on atoll islands, the detail of the waves under tropical cyclones are not fully understood, because such strong tropical cyclones attack atoll islands once in a few decades. In this study, the numerical simulation of winds and waves under the tropical cyclone "Gavin" were carried out. The simulated results showed that the lagoonal significant wave height increased twice as high as the mean wave height in March. In the tropical cyclone situation, the place of passage and effective fetch are important for the lagoonal wave condition., Japan Society of Civil Engineers
土木学会論文集B2（海岸工学）, 2010, [Reviewed] - 南太平洋島嶼国を対象とした沿岸域防護のためのゾーニング図作成方法の高度化
桑原祐史; 江田雄樹; 横木裕宗; 小柳武和; 三村信男
環境地盤工学論文集, Jul. 2009, [Reviewed] - 気候変動に伴う我が国の大規模河川下流域の浸水氾濫リスクの将来予測
横木裕宗; 桑原祐史; 塙尚幸; 郡司美佳; 戸村達也; 平山歩; 三村信男, 国際環境研究協会
地球環境, 2009, [Reviewed] - Funafuti環礁Fongafale島における作用外力と地形変化に関する現地調査
佐藤大作; 横木裕宗; 桑原祐史; 茅根創; 渡邊真砂夫, 土木学会
地球環境研究論文集, 2009, [Reviewed] - メコンデルタを対象としたマングローブ分布域の推定方法に関する研究
桑原祐史; 藤原博行; 横木裕宗; 金鎮英; 伊東明彦; 小柳武和; 三村信男, 土木学会
地球環境研究論文集, 2009, [Reviewed] - Sea-level changes and vulnerability of the coastal zone
Nobuo Mimura; Hiromune Yokoki, World Scientific Publishing Co.
Changes In The Human-monsoon System Of East Asia In The Context Of Global Change, 01 Jan. 2008 - Statistical analysis of coastal morphological data sets over seasonal to decadal time scales
Kroon; A.; M. Larson; I. Möller; H. Yokoki; G. Rozynski; J. Cox; P. Larroude, Statistical analysis of long-term morphological data on coastal sedimentary features provides important information on the processes governing these features and their evolution in space and time. In this paper, seasonal, yearly and decadal (i.e. long-term) behavior of coastal morphological features is derived from field data by using both simple and advanced statistical techniques. The sedimentary features which we are especially focusing on are a) nearshore bars, and b) large-scale shoreline undulations, for example, longshore sand waves and nesses. High-quality bathymetric field data of regularly sampled cross-shore profiles and shorelines were the basis of the available data sets at Noordwijk beach (The Netherlands), Duck, North Carolina (USA), Sylt (Germany), Lubiatowo (Poland) and Winterton (UK). Additional data sets from Argus video-images (see [Holman, R.A., Stanley, J., 2007. The history, capabilities and future of Argus. Coastal Engineering Special Issue of the CoastView project. doi: 10.1016/j.coastaleng.2007.01.003]) and aerial photographs were used to increase the temporal and spatial resolution of the data sets where possible. The statistical methods applied include some linear and non-linear techniques described by Larson et al. [Larson, M., Capobianco, M., Jansen, H., Rozyfiski, G., Southgate, H.N., Stive, M., Wijnberg, K.M., Hulscher, S., 2003. Analysis and modeling of field data on coastal morphological evolution over yearly and decadal time scales. Part 1: background and linear techniques. Journal of Coastal Research, 19-4, 760-775] and Southgate et al. [Southgate, H.N., Wijnberg, K.M., Larson, M., Capobianco, M., Jansen, H., 2003. Analysis of field data of coastal morphological evolution over yearly to decadal timescales. Part 2: non-linear techniques. Journal of Coastal Research, 19-4, 776-789]. The methods proved to be useful for extracting characteristics of the coastal sedimentary features concerning length scales (e.g., spacing and rhythmicity) and temporal scales (e.g., migration rates and evolutionary patterns). However, the success of the statistical analysis strongly depends on the total size of the data set characterized by the specific spatial coverage, spatial resolution, temporal resolution, and overall length in time. Recent data sets from remote sensing video systems like Argus often meet these requirements and are of major importance for the formulation of conceptual behavior models. (C) 2007 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
Coastal Engineering, 2008, [Reviewed] - ベトナム国フエ市を対象とした気候変動が土地利用に及ぼす影響の分析
桑原祐史; 横木裕宗; Sisouk, M; 安原一哉; 小柳武和; 三村信男
応用測量論文集, 2008, [Reviewed] - マーシャル諸島マジュロ環礁ローラ島における沿岸漂砂量分布に関する現地調査と数値計算
佐藤大作; 横木裕宗; 桑原祐史; 茅根創; 三村信男, Atoll islands with low-lying and little resource have high vulnerability against the sea-level rise due to the global warming. The countermeasures concerning the future land maintenance against the sea-level rise should be considered immediately. However, the studies on the quantitative information or numerical models of atoll island changes are quite few. Thus, in this study, measurement of beach profiles in Laura islet located in the western part of Majuro Atoll, Marshall Islands were carried out on the same profiles which were measured in 1997 and 1998 by SOPAC. Comparing our measurement results with the previous SOPAC's profiles revealed the quantitative profile changes during the last decade: from 1997 to 2007. It also revealed that the lagoonal coastline in Laura islet were stable in the last decade except some coast lines. We also reproduced these profile changes by the numerical model which was developed in this study based on longshore sediment transport system. The results of numerical calculation and the measured geographical changes showed a good agreement., Japan Society of Civil Engineers
地球環境研究論文集, 2008, [Reviewed] - 気候変動に伴う洪水・氾濫リスクの将来予測 －那珂川・久慈川流域における解析－
横木裕宗; 戸村達也; 塙尚幸; 桑原祐史; 三村信男, The changes in intensity and pattern of rain fall and sea-level rise are projected due to climate change. The risks of river floods and inundations may increase due to these effects of climate change. In this study, a method for estimating the future risks of river flood and inundation was developed based on a general numerical model, in which the future river flood discharge was calculated by a climate scenario using the transfer function method. It was applied in Naka and Kuji rivers areas in Ibaraki, Japan, and revealed that the maximum inundation area will not change much because rain fall will not change in these areas but the rate of inundation during the flood will accelerate., Japan Society of Civil Engineers
地球環境研究論文集, 2008, [Reviewed] - 大規模河川下流域を対象とした海面上昇による氾濫リスク推定のための基礎的分析
桑原祐史; 郡司美佳; 横木裕宗; 三村信男; 小柳武和, Climate change would apprehend the risk of flood in lowland area due to sea-level rise. In order to consider various adaptation plans against floods, and estimate the floodamages, it is impottant to estimate the area, population, and land use. Thus, the GIS-based analysis of flood area was developed in this study for the ten river basins selected in this study. However, the geographic information had to be re-edited for each river basin, because they had been provided for each administrative area. Then, the flood simulations were carried out using the level flood method for the 10 coastal plain in Japan. As a result of this reseatth, population and land use were summed for the flooded area, and major three features of the basins were extracted through this research., Japan Society of Civil Engineers
地球環境研究論文集, 2008, [Reviewed] - Flood damage evaluation in Japan under climate change
So Kazama; S. Machida; S. Kawagoe; M. Sawamoto; K. Yasuhara; H. Yokoki
Proceedings of the international symposium Mitigation and adaptation of climate-change-induced natural disasters, Sep. 2007 - Atoll island vulnerability to flooding and inundation revealed by historical reconstruction: Fongafale Islet, Funafuti atoll, Tuvalu
Yamano; H.; H. Kayanne; T. Yamaguchi; Y. Kuwahara; H. Yokoki; H. Shimazaki; and M. Chikamori, The reef islands formed on coral atolls are generally small, low, and flat, with elevations of only a few meters. These islands are thus highly vulnerable to elevated sea levels caused by extreme events and global warming. Such vulnerability was recently evidenced at Fongafale Islet, the capital of Tuvalu, when it flooded during accelerated spring high tides possibly related to sea level rise caused by global warming. Many factors, not only environmental but also economic and social, determine the vulnerability of an island to sea level rise. In this study, we used data spanning 108 yrs to reconstruct changes in topography, land use/cover, population, and the distribution of buildings at Fongafale Islet. The results indicate that the vulnerability of Fongafale Islet relates to its original landform characteristics: the central part of the island was formerly dominated by swampland that flooded at high tides. Fongafale Islet experienced greater population in-migration and centralization beginning in the 1970s following the independence of Tuvalu and Kiribati. Migrants were also responding to declines in overseas mining operations and limited options for paid employment. As the population increased, construction took place in vulnerable swampland areas. Our results clearly demonstrate that examinations of global environmental issues should focus on characteristics specific to the region of interest. These characteristics should be specified using historical reconstruction to understand and address the vulnerability of an area to global environmental changes. (c) 2007 Elsevier B.V All rights reserved., ELSEVIER SCIENCE BV
Global and Planetary Change, 2007, [Reviewed] - マジュロ環礁を対象とした国土防護のための沿岸域ゾーニングプロセス
桑原祐史; 横木裕宗; 佐藤大作; 三村信男, Global warming and sea-level rise are projected to affect seriously on atolls, which are narrow and low-lying islets on coastal reefs. Coastal erosion or decrease of coastal vegetation would be critical problems for atoll islands. Then, we focused on ground level, land cover and vegetation in the coastal zone, and classified land use of the coastal zone on Majuro atoll. Geographical features and land cover of the coastal zone was able to be divided by using ground truth data acquired in filed investigation, GPS-image, satellite image (IKONOS). Finally, it was proposed that the region where protection measures were necessary and the current state were preserving., Japan Society of Civil Engineers
土木情報利用技術論文集, 2007, [Reviewed] - 複素主成分分析による波浪エネルギーフラックスが海浜変形へ及ぼす影響の解析
横木裕宗; 塙尚幸; 三村信男, Complex principal component analysis (CPCA) was applied to the bottom topographic data surveyed on Ajigaura and Tokai coast in Ibaraki prefecture, in order to detect the features of topographic changes and the correlations between the changes of bottom topography and energy fluxes of the incident waves.The method for incorporating wave data into bottom sounding data was proposed in this study. The results obtained in the study confirmed the applicability of CPCA to analyze the beach topographic changes as well as the effects of wave energy fluxes on the topographic changes., Japan Society of Civil Engineers
海岸工学論文集, 2007, [Reviewed] - Evaluation of various satellite sensors for waterline extraction in a coral reef environment: Majuro Atoll, Marshall Islands
Hiroya Yamano; Hiroto Shimazaki; Tsuneo Matsunaga; Albon Ishoda; Caleb McClennen; Hiromune Yokoki; Kazuhiko Fujita; Yoko Osawa; Hajime Kayanne, The ability of five satellite sensor bands (IKONOS band 4, Terra ASTER bands 3 and 4, and Landsat ETM+ bands 4 and 5) was examined to extract the waterline at coral reef coasts (Majuro Atoll, Marshall Islands) using different wavelength regions (near infrared [NIR] and shortwave infrared [SWIR]) and different spatial resolutions (4, 15, and 30 m). After performing georeferencing and normalization of the images, density slicing was used to extract the waterline. Comparisons of extracted waterline positions with ground-level data for eight transects and global positioning system (GPS) tracks of the island shorelines showed that NIR bands were superior to SWIR bands because of the characteristics of the coral reef coasts, including a lack of foam and suspended sediments (which can affect the NIR wavelength region, if present) and the presence of remnant water on reef flats during low tide (which can affect the SWIR wavelength region). A linear relationship was found between the estimation errors of waterline positions and the spatial resolutions of the NIR sensors. Analysis on estimation errors and image costs showed that Terra ASTER band 3 was the most cost-effective sensor for extracting waterlines with reasonable accuracy. The results serve as general guidelines for using satellite-derived data to estimate intertidal topography and detect and monitor shorelines in coral reef environments. (c) 2006 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV
GEOMORPHOLOGY, Dec. 2006, [Reviewed] - 阿字ヶ浦海岸汀線近傍における礫出現に関する現地調査
熊谷隆; 横木裕宗; 三村信男, 茨城県の阿字ヶ浦海岸では, 海岸侵食とともに近年汀線付近への礫の出現が問題となっている. 本研究では, 定期的な現地観察を行い, 礫の出現と入射波エネルギーフラックスとの関係を明らかにした. また, 浅海部の海底状況調査や蛍光礫トレーサー追跡調査により, 岸沖・沿岸方向における礫の移動過程を明らかにした. これらの調査の結果, 阿字ヶ浦海岸南部の礫は元来地盤の下層にあったものが表層砂層の侵食によって露呈したものであること, 礫は高波浪ピークから4～5日後に出現すること, 常時波浪時においても, 礫は波の突っ込み点付近の分布帯と汀線付近を往復移動していることなどが明らかとなった., Japan Society of Civil Engineers
海岸工学論文集, Nov. 2006, [Reviewed] - 海面上昇後のマーシャル諸島マジュロ環礁における地形維持過程の数値シミュレーション
佐藤大作; 横木裕宗; 藤田和彦; 桑原祐史; 山野博哉; 島崎彦人; 茅根創; 渡邊真砂夫, マーシャル諸島マジュロ環礁では, 近年沿岸環境の変化に伴うと考えられる海岸侵食が問題となっており, また, 将来の海面上昇に対しての国土維持が大きな課題となっている.本研究では海面上昇前と上昇後の波浪場の算定から得られた沿岸方向エネルギーフラックスと現地調査で得られた有孔虫による底質供給量から土砂移動量の算定を行い, その結果から土砂堆積量ポテンシャルの変化を定量的に明らかにした.さらに, 2005年8月に行った現地調査結果との比較を行った結果, Laura地域において実際の地形変化傾向と計算結果の問に相違が見られ, これは流れ場の特性の違いによるものであると考えられた.また, 流動特性の他にも人為的な土地利用の改変が地形維持に大きく関係していることが予想された., Japan Society of Civil Engineers
海岸工学論文集, Nov. 2006, [Reviewed] - Impacts of sea-level rise on coastal physical and ecological systems: predictions and responses
Nobuo Mimura; Hiromune Yokoki, Global warming-induced climate change and sea-level rise impose serious impacts on natural and human systems in coastal zones. This paper introduced the most recent information on these impacts based on the IPCC Third Assessment Report (2001) and Comprehensive Assessment for Japan (2003). The impacts studied were coastal erosion, damage of coral reefs and mangroves, and vulnerability of coastal cities in the Asia and Pacific region. As a precursor impact of warming, high-latitude coasts were also examined since they are already suffering from exacerbated erosion. As the countermeasures to adjust coastal systems to the impacts are called adaptation, conditions for planning and implementation were discussed. To establish a comprehensive strategy for responses to global warming, discussions on the threshold of the impacts and adaptive capacities of natural and human systems were included., 日本海洋学会沿岸海洋研究部会
Bulletin on Coastal Oceanography, 25 Feb. 2005 - Analysis of land use change around coastal zone in Tuvalu Funafuti atoll
Yuji Kuwahara; Hiromune Yokoki; Hiroya Yamano; Hajime Kayane; Hiroto Shimazaki; Masashi Chikamori; Toru Yamaguchi, The purpose of this research is to analyze the land use change around the coastal zone at Fongafale island in Tuvalu by using map information, aerial photograph and satellite image. Now, it was reported that the Global warming is advanced by heat-trapping gas. And, it has misgivings about coastal erosion along with the sea-level rise. Then, to make the prior information used to settle on the adjustment plan, it advanced the analysis of the geographic information in this research.According to the examination, it has understood that the vegetation area on the Fongafale island decreases for the long term. And, it has understood that the vegetation of the lagoon coastal zone decreases by development in recent years.
Asian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005, 2005 - Investigations on recent accelerated beach erosion on Ajigaura coast, Ibaraki, Japan
Yokoki; H.; N. Mimura; Y. Minami; and H. Nobuoka, Bottom topographic and shoreline survey data as well as observed wave data were analyzed to identify the process and causes of the recent accelerated beach erosion occurred in Ajigaura coast these two years. Analyses of topographic data for whole the coast indicated that about 300,000 m(3) sediments in total had been transported northward on the shoreline area since 1998. The changes of the surf similarity parameter calculated using cross-shore profile data and wave data revealed that the recent accelerated beach erosion was caused by both southerly high wave energy and breaker-type change due to steepening of foreshore slope., WORLD SCIENTIFIC PUBL CO PTE LTD
Coastal Engineering 2004, 2005 - Interdisciplinary approach for sustainable land management of atoll islands
Kayanne; H.; M. Chikamori; H. Yamano; T. Yamaguchi; H. Yokoki; and H. Shimazaki
Global Environmental Research, 2005 - Comparison between longshore sediment transport due to waves and long-term shoreline change in Majuro atoll, Marshall Islands
Yokoki; H.; H. Yamano; H. Kayanne; D. Sato; Y. Minami; S. Ando; H. Shimazaki; T. Yamaguchi; M. Chikamori; A. Ishoda; and H. Takagi
Global Environmental Research, 2005 - Excavation of pit-agriculture landscape on Majuro atoll, Marshall Islands, and its implications
Yamaguchi; T.; H. Kayanne; H. Yamano; Y. Najima; M. Chikamori; and H. Yokoki
Global Environmental Research, 2005 - Efforts to generate maps of atoll countries
Yamano; H.; H. Shimazaki; H. Kayanne; H. Yokoki; T. Yamaguchi; M. Chikamori(第4著者,他16名)
Global Environmental Research, 2005 - Geographic database on the natural and socioeconomic conditions of reef islands
Shimazaki; H.; H. Yamano; H. Yokoki; T. Yamaguchi; M. Chikamori; M. Tamura; and H. Kayanne
Global Environmental Research, 2005 - マングローブ林による波浪減衰効果の実験・数値的検討
柳澤英明; 横木裕宗; 三村信男, 近年, 東南アジア諸国の沿岸部ではマングローブ植林が, 経済的に安価で, 自然環境にも適した減災対策として実施されている. 本研究では, マングローブ植林の防波効果を定量的に明らかにすることを目的とし, 模型実験および数値計算から波浪減衰を算定した. その結果, 植生の枝葉部分は短周期の波を大きく減衰させることが, 実験より明らかとなった. またマングローブ林を抵抗としてモデル化した数値計算で植林幅, 密度と透過率を検討し, 植林密度が1本/m2のときには岸沖幅100m程度の植林で, 70%以上の波高が削減できることが分かった. また, マングローブ林周辺の平面波浪場を解析し, マングローブ林背後での回折の効果を確認した., Japan Society of Civil Engineers
海岸工学論文集, 2005 - 沿岸漂砂量の岸沖分布を考慮した海岸線変化モデルの構築と阿字ヶ浦海岸への適用
南陽介; 横木裕宗; 三村信男, 阿字ヶ浦海岸で生じている海浜変形を再現し, 効果的な侵食対策工に資するため, 本研究では沿岸漂砂量の岸沖分布を考慮した海岸線変化モデルを構築し, 汀線付近の詳細な地形変化の再現を試みた. その結果, 前浜の急勾配化を伴う断面地形変化の傾向を捉えることに成功した. また, 侵食対策工を想定して計算した結果, 離岸堤背後で地形変化が抑制され, 海浜地形が安定するという結果が得られた. さらに, 養浜砂が汀線付近に留まることを計算で確認できたことから, 今後も定期的な養浜を継続していくことで砂浜を保持できる可能性が示唆された., Japan Society of Civil Engineers
海岸工学論文集, 2005 - 環礁州島における地形維持機構とラグーン内波浪場の関係に関する現地調査
横木裕宗; 佐藤大作; 山野博哉; 島崎彦人; 安藤創也; 南陽介; 高木洋; 茅根創; Albon Ishoda
海岸工学論文集, Nov. 2004 - Complex principal component analysis to characterize beach topographic change in Sylt Island, Germany
Yokoki; H. and M. Larson
Proceedings of the 2nd International Conference on Asia and Pacific Coasts, 02 Mar. 2004 - 阿字ヶ浦海岸における最近の急激な海岸侵食の実態解明
横木裕宗; 南陽介; 信岡尚道, 阿字ヶ浦海岸における最近2年間の汀線付近の急激な侵食の過程と要因を明らかにするために, 深浅測量・汀線測量データ, 入射波浪データ, 潮位変動データを解析した.その結果, 海岸全体の土砂変化量の推移の解析から, 1998年頃から現在までに汀線付近を南部から北部へ約30万m3の土砂が移動したことを確認した.また, 縦断地形変化と波浪データを解析することで, 最近2年間の汀線付近の急激な侵食は, 南よりの高波浪と前浜の急勾配化による砕波形式の変化の相乗作用によって生じたことが明らかとなった.なお, 潮位変動データには最近2年間で顕著な変化は見られなかった., Japan Society of Civil Engineers
海岸工学論文集, Nov. 2003 - Deducing the characteristics of large-scale beach topographic change by complex principal component analysis
Yokoki; H. and N. Mimura, Complex principal component analysis (CPCA) is applied to a series of topographic survey data obtained in Kashimanada Coast, Japan, in order to investigate the characteristics of the beach topographic change. A new parameter called "local ratio of contribution" was introduced to identify a predominant mode of CPCA to characterise the topographic change at each surveyed point. Consequently, the trend of topographic change on the coast were evaluated in detail by using the temporal and spatial functions as well as the local ratio of contribution., American Society of Civil Engineers (ASCE)
Coastal Engineering 2002, Sep. 2003 - 複素主成分分析を用いたSylt島海岸における地形変化特性の解析
横木裕宗; Magnus Larson, 複素主成分分析は, 膨大な量の深浅測量データを統計的に解析し海岸地形変化のパターンを抽出する一つの有用な方法である. しかし, 対象領域内の場所毎に地形変化のパターンが大きく異なる場合, 複素主成分の1モードだけで領域全体の変化を記述しようとすると結果は漠然としたものになる. そこで本研究では, 領域内の地点毎に最適なモードを選択し変化パターンの違いを明確に表示するために, 局所寄与率を導入した. さらに, Sylt島海岸における深浅測量データにこの手法を適用し, 養浜実施後の地形変化の特性を明らかにした., Japan Society of Civil Engineers
海岸工学論文集, Oct. 2002 - Coastal Environment Problems in Japan and Related Activities of Committee on Coastal Engineering, JSCE
Mimura; N. and H. Yokoki
Progress in Coastal Engineering and Oceanography, 1999 - (Recent Shoreline Change on Kashimanada Coast, Journal of Japanese Association for Coastal Zone Studies)
日本沿岸域学会論文集, 1998 - Principal Component Analysis of Beach Topography Change, Proceedings of Coastal Engineering, JSCE)
横木 裕宗; 三村 信男; 佐藤 圭輔, Japan Society of Civil Engineers
海岸工学論文集, 1998 - Experimental Study on the Directional Spreading Characteristics of Waves Caused by Overtopping, Proceedings of Coastal Engineering, JSCE)
横木 裕宗; 岸田 隆嗣; 鈴木 重勝; 三村 信男, Japan Society of Civil Engineers
海岸工学論文集, 1998 - Global Distribution of Sea-Level Rise and its Risk Index based on the latest Climate Scenario
三村 信男; 小島 治幸; 川森 晃; 喜岡 渉; 五明 美智男; 和田 清; 横木 裕宗, Japan Society of Civil Engineers
Doboku Gakkai Ronbunshuu B, 1997, [Reviewed] - (Assessment of Coastal Environment Characteristics…Case Studies of Hokkaido, Ibaraki, Kanagawa, Aichi, Mie And Fukuoka…, Proceedings of Coastal Engineering, JSCE)
海岸工学論文集, 1997 - (On the Accuracy of Estimated Directional Spectrum In a Field of Incident And Reflected Waves, Proceedings of Coastal Engineering, JSCE)
横木 裕宗, Japan Society of Civil Engineers
海岸工学論文集, 1996 - (Statistical Characteristics of Multi-Directional Random Waves around Tip of Breakwater, Proceedings of Coastal Engineering, JSCE)
川崎 俊正; 磯部 雅彦; 渡辺 晃; 横木 裕宗; 小竹 康夫; 藤原 隆一, Japan Society of Civil Engineers
海岸工学論文集, 1996 - A Method for Estimating Directional Spectra in a Field of Incident And Reflected Waves(共著)
Coastal Engineering, 1996 - (Applications to field Experiment Data of a Method for Estimating Directionl Spectrum by Using the Circular Normal Distribution Function, Proceedings of Coastal Engineering, JSCE)
横木 裕宗; 磯部 雅彦; 渡辺 晃, Japan Society of Civil Engineers
海岸工学論文集, 1995 - (A Method for Estimating Directional Spectrum in Incident And Reflected Waves by Using the Circular Normal Distribution Function, Proceedings of Coastal Engineering, JSCE)
横木 裕宗; 磯部 雅彦; 渡辺 晃, Japan Society of Civil Engineers
海岸工学論文集, 1994 - A Method for Estimating Reflection Coefficient in Short-Crested Random Seas(共著)
Coastal Engineering, 1992 - On a Method for Estimating Reflection Coefficient in Short-Crested Random Seas(共著)
Coastal Engineeing, 1992 - (A Method for Estimating Reflection Coefficient in Short-Crested Random Seas, Proceedings of Coastal Engineering. JSCE)
横木裕宗; 磯部雅彦; 渡辺晃, Japan Society of Civil Engineers
海岸工学論文集, 1991
MISC
- Linking Climate Change Prediction Research and Adaptation Decision-making
高薮出; 花崎直太; 塩竈秀夫; 安部大介; 生駒栄司; 石川洋一; 江守正多; 大場あい; 小埜恒夫; 嶋田知英; 田浦健朗; 高橋潔; 仲江川敏之; 中北英一; 西森基貴; 初鹿宏壮; 福渡潔; 真砂佳史; 三上直之; 横木裕宗; 吉川実; 渡部雅浩
水文・水資源学会誌, 2024 - To Deliver Climate Change Projection Information to Users
高薮 出; 花崎 直太; 塩竈 秀夫; 石川 洋一; 江守 正多; 嶋田 知英; 杉崎 宏哉; 高橋 潔; 仲江川 敏之; 中北 英一; 西森 基貴; 橋爪 真弘; 初鹿 宏壮; 松井 哲哉; 山野 博哉; 横木 裕宗; 渡部 雅浩
水文・水資源学会誌, 20 Nov. 2021 - 気候変動の沿岸域への影響と適応策
横木裕宗
用水と排水, 2019, [Invited] - 沿岸域における気候変動の影響とその適応策
横木裕宗
水環境学会誌, 2012 - 環礁州島の海岸地形変化への気候変動の影響と適応策
横木裕宗; 佐藤大作
水環境学会誌, 2010, [Invited] - 沿岸域における適応策の考え方
横木裕宗
港湾, Feb. 2009, [Invited] - 気候変動は沿岸域にどのような影響を与えるのか？
横木裕宗
土木学会誌, Jul. 2008, [Invited] - 気候変動・海面上昇が環礁州島の地形維持機構に与える影響 －マーシャル諸島マジュロ環礁における現地調査－
横木裕宗
南太平洋海域調査研究報告, 2007, [Invited] - 代表波の算出，第5編海岸・港湾編，水理公式集 例題プログラム集平成13年度版
土木学会, 07 Mar. 2002
Books and other publications
- 〔Major achievements〕Climate Security: Global Warming and a Free and Open Indo-Pacific
The Ocean Policy Research Institute of the Sasakawa Peace Foundation, Contributor
Tokai Education Research Institute, 01 Oct. 2022
9784924523272 - 気候安全保障 地球温暖化と自由で開かれたインド太平洋
公益社団法人笹川平和財団海洋政策研究所編,阪口秀監修, Joint work
東海教育研究所, 16 Sep. 2021
9784924523258 - 水理公式集[2018年版]
土木学会水工学委員会,水理公式集編集小委員会, Joint work
土木学会, 01 Mar. 2019
9784810608359 - 気候変動下の水・土砂災害適応策
横木裕宗; 佐藤大作; 池田駿介; 小松利光; 馬場健司; 望月常好編, Joint work
近代科学社, 30 Nov. 2016
9784764905306 - ポスト震災社会のサステイナビリティ学--地域と大学の新たな協働をめざして--
小峯秀雄; 木村競; 横木裕宗; 三村信男監修; 田村誠; 伊藤哲司; 木村競; 加藤禎久; 坂上伸生編, Joint work
国際文献社, 25 Mar. 2014 - 地球温暖化はどれくらい「怖い」か?
Single work
技術評論社, 2012
9784774150352 - 地球温暖化への3つの選択
Single work
生産性出版, 2011 - Changes in the Human-Monsoon System of East Asia in the Context of Global Change
Mimura; N. and H. Yokoki, Joint work
World Scientific, 2008 - サステイナビリティ学をつくる
Joint work
新曜社, 2008 - 地球温暖化はどこまで解明されたか 日本の科学者の貢献と今後の展望2006
第29著者,他28名., Joint work
丸善, Mar. 2006
Lectures, oral presentations, etc.
- 日本沿岸域における現状の海岸防護レベルの推定
山本浩司; 横木裕宗
地球環境シンポジウム講演集(CD-ROM), 2024
2024, 2024 - 〔Major achievements〕顕在化する気候変動の影響と適応策〜沿岸域を中⼼として〜
横木裕宗
第31回地球環境シンポジウム一般公開シンポジウム, 20 Sep. 2023, 土木学会地球環境委員会, [Invited] - 複数の気候モデルを用いた気温上昇量と海面上昇量の関係
竹内遼真; 横木裕宗
第31回地球環境シンポジウム講演集, Sep. 2023
202309, 202309 - 沿岸都市域の浸水影響評価と適応策
横木裕宗
令和４年度 環境研究総合推進費オンラインシンポジウム「都市と気候変動」, 24 Sep. 2022, 日本環境共生学会、独立行政法人環境再生保全機構, [Invited] - 標高データの解像度が海面上昇による浸水解析結果に及ぼす影響
神白 貴章・横木 裕宗
第30回地球環境シンポジウム講演集, 31 Aug. 2022, 土木学会地球環境委員会
20220831, 20220831 - Proposal for a Cost Framework for Residential Relocation to Adapt to Sea Level Rise
Imamura; K.; Tamura; M.; Yokoki; H.
Hiroshima International Conference on Peace and Sustainability 2022, 01 Mar. 2022 - Assessment of inundation and economic impacts of sea level rise in Japanese coastal areas via shared socioeconomic pathways of population and land use
Tamura; M.; Yokoki; H.
International Conference on Contemporary Issues in Sustainable Development 2021, 08 Dec. 2021, VNU Vietnam Japan University - Economic assessment of coastal adaptation using gray and green infrastructures against sea level rise in Vietnam
Tamura; M.; Kumano; N.; Yokoki; H
6th International Conference on Vietnamese Studies, 29 Oct. 2021, Vietnam Institute of Economics - Estimating the cost of coastal protection using mangrove forests against sea level rise in the Philippines and Vietnam
Kumano; N.; M. Tamura; T. Inoue; and H. Yokoki
2019 AGU Fall Meeting, 2019 - Impact and cost assessment of coastal protection mixing green infrastructure against sea level rise in Vietnam
Tamura; M.; N. Kumano; T. Inoue; and H. Yokoki
Hanoi Forum 2018, 2018 - Global distribution of projected sea level changes using multiple climate models and economic assessment of sea level rise
Yokoki; H.; M. Tamura; and Y. Kuwahara
International WCRP/IOC Conference 2017 "Regional Sea Level Changes and Coastal Impacts", Jul. 2017, WCRP/IOC, [Invited] - VERIFICATION OF THE ESTIMATION METHOD FOR ECONOMIC DAMAGE OF STORM SURGE IN THE CASE OF ISEWAN TYPHOON
箭内 春樹; 熊野 直子; 田村 誠; 横木 裕宗; 桑原 祐史
地球環境研究論文集 = Global environment engineering research : 地球環境シンポジウム, 2017, 土木学会
2017, 2017 - Global cost analysis on adaptation to sea level rise based on RCP/SSP scenarios
Tamura; M.; N. Kumano; M. Yotsukuri; Y. Kuwahara; and H. Yokoki
2017 AGU Fall Meeting, 2017 - フナフチ環礁ラグーンの吹送流がラグーン流動場および海水交換に与える影響
朝原 大貴; 江口 三希子; 佐藤 大作; 横木 裕宗
日本沿岸域学会全国大会, 16 Jul. 2016, 日本沿岸域学会 - Coastal Management for Shore Protection in Atoll Islands
Yokoki; H. and D. Sato
2nd International Seminar on Islands and Oceans, 2010, Ocean Policy Research Foundation, [Invited] - Numerical Calculation of the Sediment Transports along the Lagoonal Coast on Majuro Atoll
Sato; D. and H. Yokoki
Coastal Dynamics 2009, Impacts of Human Activities on Dynamic Coastal Processes, 2009 - Impacts on Coastal Areas due to Climate Changes and Sea-Level Rise -- Investigations on Majuro atoll, the Marshall Islands --
Yokoki; H.; Y. Kuwahara; D. Sato; and N. Mimura
2nd International Symposium on Climate Change and the Sustainability, Nov. 2008 - Tuvaluを対象とした沿岸植生の分析
桑原祐史; 横木裕宗; 小柳武和; 三村信男
第35回土木学会関東支部技術研究発表会, Mar. 2008 - メコンデルタを対象とした地理情報作成に関する一考察
藤原博行; 桑原祐史; 町田聡; 横木裕宗
第35回土木学会関東支部技術研究発表会, Mar. 2008 - Numerical calculation of the change of waves and longshore sediment transports due to the sea-level rise on Majuro atoll, the Marshall Islands
Sato; D.; H. Yokoki; Y. Kuwahara; K. Fujita; Y. Osawa; H. Yamano; H. Kayanne; and M. Watanabe
21st Pacific Science Congress, 18 Jun. 2007 - Field survey and numerical calculation on beach profile changes around Laura islet, Majuro atoll, the Marshall Islands
Yokoki; H.; T. Hayashi; Y. Kuwahara; D. Sato; H. Yamano; H. Kayanne; and M. Watanabe
21st Pacific Science Congress, 17 Jun. 2007 - 那珂川・久慈川流域における洪水リスクの変遷および将来予測
平山歩; 横木裕宗; 三村信男
第14回地球環境シンポジウム講演論文集, Aug. 2006
200608, 200608 - Majuro環礁における持続可能な国土利用に向けての現地調査
横木裕宗; 桑原祐史; 林利一; 佐藤孝一; 三村信男
第14回地球環境シンポジウム講演論文集, Aug. 2006
200608, 200608 - Conditions and activities supporting early prehistoric human settlement on Majuro Atoll in Marshall Islands, Eastern Micronesia
Yamaguchi; T.; M. Chikamori; H. Kayanne; H. Yamano; H. Yokoki; and Y. Najima
Proceedings of 10th International Coral Reef Symposium, 2006
2006, 2006 - Satellite-based typology to access stability and vulnerability of atoll islands: a comparison with archaeological data
Yamano; H.; Y. Yamaguchi; M. Chikamori; H. Kayanne; H. Yokoki; H. Shimazaki; M. Tamura; S. Watanabe; S. Yoshii
Proceedings of 10th International Coral Reef Symposium, 2006
2006, 2006 - Numerical calculations of longhsore sediment transport due to wave transformation in the lagoon of Majuro Atoll, Marshall Islands
Yokoki; H.; H. Yamano; H. Kayanne; D. Sato; H. Shimazaki; T. Yamaguchi; M. Chikamori; T. A. Ishoda; and H. Takagi
Proceedings of 10th International Coral Reef Symposium, 2006
2006, 2006 - Global mapping of factors controlling reef-island formation and maintenance
Shimazaki; H.; H. Yamano; H. Yokoki; T. Yamaguchi; M. Chikamori; M. Tamura; and H. Kayanne
Proceedings of 10th International Coral Reef Symposium, 2006
2006, 2006 - Numerical calculation of wave transformations in the lagoon of Majuro atoll, Marshall Islands for estimating the natural topographic change processes due to waves and currents
Yokoki; H.; H. Yamano; H. Kayanne; D. Sato; and Y. Minami
10th International Coral Reef Symposium, 01 Jul. 2004
Affiliated academic society
Research Themes
- 気候変動に伴う沿岸地域の脆弱性評価と適応策の費用便益分析
戦略的研究開発領域S14テーマ3(4)
Apr. 2015 - Mar. 2020 - Possibilities and limitations for Climate Change Adaptation
Grant-in-Aid for Scientific Research (B)
Ibaraki University
Apr. 2014 - Mar. 2018 - Projection, impact assessment and adaptation of future coastal environment due to climate change
Grant-in-Aid for Scientific Research (A)
Kyoto University
Apr. 2011 - Mar. 2015 - Comprehensive Study on International Capacity Responding to Climate Change by Research Consortium
Grant-in-Aid for Scientific Research (A)
Ibaraki University
2005 - 2008 - Comprehensive research on adaptations to climate change and sea-level rise
Grant-in-Aid for Scientific Research (A)
Ibaraki University
2002 - 2004 - A NUMERICAL MODEL OF WAVE-RUN-UP AND RESULTING LONGSHORE SEDIMENT TRANSPORT DUE TO OBLIQUELY INCIDENT WAVE
Grant-in-Aid for Scientific Research (B)
THE UNIVERSITY OF TOKYO
1996 - 1997
