Mamoru KOARAIProfessor

■Researcher basic information

Organization

  • College of Science Department of Sciences Earth Sciences
  • Graduate School of Science and Engineering(Master's Program) Major in Science
  • Graduate School of Science and Engineerin(Doctoral Program) Major in Complex Systems Science
  • Faculty of Basic Natural Science Domain of Earth Sciences

Research Areas

  • Natural sciences, Human geoscience, Geomorphology / Quaternary Science / active fault / slope deformation / liquefaction / Human Environment and Disaster Risk
  • Natural sciences, Solid earth science, Geology / Quaternary Geology / Applied Geology / Earth surface deformation / Geodesy
  • Humanities & social sciences, Geography, Natural Geography / Cartography / Geographic Information System / Remote sensing / Geo Spatial Information Science / Landscape Ecology / Land Use Change
  • Social infrastructure (civil Engineering, architecture, disaster prevention), Disaster prevention engineering, Disaster prevention science / Natural disaster
  • Environmental science/Agricultural science, Environmental impact assessment, Environmental Risk Management
  • Energy, Earth resource engineering, energy science, Earth system and resources engineering

Research Keyword

  • Geomorphology / Quaternary Geology / Applied Geology / Natural Geography / Disaster prevention science /Geo Spatial Information Science / Cartography / Geodesy/ Geographic Information System / Remote sensing

Degree

  • 2009年03月 博士(理学)(茨城大学)

Educational Background

  • Apr. 2006 - Mar. 2009, Ibaraki University, Graduate School (Doctor Program) of Science and Engineering, Cosmic and Earth System Science
  • Apr. 1980 - Mar. 1984, Ibaraki University, Faculty of Science, Department of Earth Science

Career

  • Apr. 2025 - Present, 茨城大学基礎自然科学野地球環境科学領域教授
  • 2015 - Present, 東京大学, 空間情報科学研究センター, 客員研究員
  • 2015 - Present, 国土交通省 国土地理院, 客員研究員
  • Apr. 2018 - Mar. 2025, 茨城大学大学院理工学研究科(理学野), 地球環境科学領域, 教授
  • Apr. 2015 - Mar. 2018, 茨城大学 理学部, 理学科 地球環境科学領域, 教授
  • Apr. 2014 - Mar. 2015, 国土交通省 国土交通大学校, 測量部, 部長
  • Jul. 2005 - Mar. 2014, 国土交通省 国土地理院, 地理地殻活動研究センター地理情報解析研究室, 室長
  • Jul. 2003 - Jul. 2005, 国土交通省 国土地理院, 企画部地理情報システム推進室, 室長
  • Apr. 2001 - Jun. 2003, 国土交通省 国土地理院, 中国地方測量部, 部長
  • Apr. 1999 - Mar. 2001, 建設省(2001年1月6日より国土交通省) 国土地理院, 測図部写真測量技術開発室, 室長
  • Apr. 1997 - Mar. 1999, 科学技術庁, 研究開発局地震調査研究課/企画課防災科学技術推進室, 地震調査官/室長補佐
  • Oct. 1994 - Mar. 1997, 環境庁, 自然保護局計画課自然環境調査室, 調査企画専門官
  • Apr. 1993 - Sep. 1994, 建設省 国土地理院, 地理調査部 地理調査技術開発室, 調査員
  • Apr. 1990 - Mar. 1993, 建設省, 河川局 海岸課, 海洋開発係長
  • Apr. 1987 - Mar. 1990, 建設省 国土地理院, 地理調査部地理第一課, 地理調査第一係 係員
  • Apr. 1986 - Mar. 1987, 建設省 国土地理院, 関東地方測量部, 調査係 係員
  • Apr. 1984 - Mar. 1986, 通商産業省(現在の経済産業省) 東京鉱山保安監督部, 管理課/監督課/公害防止課, 通商産業技官

Member History

  • Jul. 2025 - Present, 行事委員会委員、学会賞選考委員会委員, 日本第四紀学会
  • Jun. 2025 - Present, 常任委員、連携渉外委員長, 日本地図学会
  • Aug. 2024 - Present, 防災連携委員、幹事, 防災学術連携体
  • Jul. 2024 - Present, 助成委員会, (一社)東京地学協会
  • Feb. 2021 - Present, 審査研修員, 日本技術者教育認定機構(JABEE)
  • Aug. 2019 - Present, 茨城県環境影響評価審査会(委員長), 茨城県
  • Jul. 2019 - Present, 地質技術者教育委員会委員, 日本地質学会
  • Oct. 2018 - Present, JAXA防災利用実証活動評価委員, リモートセンシング技術センター、三菱総合研究所など
  • May 2018 - Present, 優良地理空間情報成果等審査委員会委員, 日本地図センター
  • Oct. 2017 - Present, 市原市地磁気逆転地層保存活用検討委員会委員, 市原市
  • May 2017 - Present, 評議員, (一社)日本リモートセンシング学会
  • May 2016 - Present, 評議員, (一社)日本写真測量学会
  • Aug. 2015 - Present, 渉外委員(委員長は2015~2021), 日本第四紀学会
  • Apr. 2007 - Present, 会誌編集委員, 日本沿岸域学会
  • Jul. 2005 - Present, 評議員, 日本地図学会
  • Jul. 2005 - Present, 災害対応委員会委員, (一社)日本地理学会
  • Apr. 2017 - Mar. 2026, 教育学術部会委員, 筑波山地域ジオパーク推進協議会
  • Jul. 2023 - Jun. 2025, 執行部会メンバー、領域5代表, 日本第四紀学会
  • Aug. 2013 - Jun. 2025, 評議員, 日本第四紀学会
  • Aug. 2020 - Aug. 2024, 会長, 地学団体研究会
  • Nov. 2017 - Jun. 2023, 渉外委員会委員, (一社)東京地学協会
  • May 2022 - Mar. 2023, 土地履歴調査委員「水戸」地区, 国土交通省
  • Aug. 2015 - Jul. 2021, 執行部会メンバー・渉外委員長, 日本第四紀学会
  • Nov. 2020 - Mar. 2021, 阿見町大規模盛土調査業務検討委員, 阿見町
  • Oct. 2020 - Mar. 2021, 阿見町液状化ハザードマップ作成業務検討委員, 阿見町
  • Jul. 2005 - May 2020, 理事、企画委員会委員長、編集委員等, 地理情報システム学会
  • Mar. 2018 - Mar. 2020, 学会賞受賞候補者選考委員会, (一社)日本地理学会
  • Mar. 2016 - Mar. 2020, 代議員, (一社)日本地理学会
  • Jul. 2005 - Mar. 2019, 常任委員、編集委員、企画委員など, 日本地図学会
  • Mar. 2016 - Mar. 2018, 地理学評論編集委員会委員, (一社)日本地理学会
  • Sep. 2016 - Mar. 2017, 土地履歴調査委員「常総」地区, 国土交通省

■Research activity information

Award

  • Feb. 2012, 平成23年度日本国際地図学会賞 論文賞, 日本におけるジオパーク活動の展開と地図の活用, 日本地図学会
    目代邦康;小荒井衛
    Official journal
  • Feb. 2011, 平成22年度日本国際地図学会賞 論文賞, 航空レーザ計測による植生三次元構造を反映した植生図の作成, 日本地図学会
    小荒井衛;佐藤浩;中埜貴元
    Official journal
  • Aug. 2010, IRPRS(国際写真測量学会)第Ⅷ部会シンポジウム Best Paper Award, Landscape ecological mapping using LIDAR data for biodiversity evaluation, IRPRS(国際写真測量学会)
    Mamoru KOARAI
    International society

Paper

  • Identifying gravel-sand transition zones in alluvial plains using normalized steepness index
    Kazuki Yoshida; Mamoru Koarai, Elsevier BV
    Geomorphology, Feb. 2026, [Reviewed]
  • Reappraisal of sector collapse deposits on the southwest foot of Bandai volcano: Insights from correlating hummocks, debris avalanche deposits, and source edifices
    Furusho Koki; Koarai Mamoru, Three debris avalanche deposits (DADs) distributed on the southwest foot of Bandai volcano (from bottom to top: the Okinajima, Iwane, and Furukan-non) were correlated with hummocks and volcanic edifices based on geological, geomorphological, and petrological analyses. The longitudinal distribution of hummocks changes distinctly at a distance of about 7 km from the source, indicating formation by multiple debris avalanches. Hummocks within 7 km are subdivided into Groups A and B according to their distribution and size. The petrological characteristics of the Okinajima DAD (46 ka), Iwane DAD, Group A, and Group B samples closely resemble those of the younger edifice of Bandai volcano. Stratigraphic and petrological correlations indicate that hummocks distributed beyond 7 km correspond to the Okinajima DAD, and Group A within 7 km corresponds to the Iwane DAD. Group B could not be correlated with any known debris avalanche deposit. The Furukan-non DAD (18~17 ka) contains rocks with higher FeO*/MgO ratios and abundant plagioclase phenocrysts, which are consistent with those of the younger edifice of Nekoma volcano that had already ceased volcanic activity. However, no corresponding hummocks are observed. These findings demonstrate that petrological characterization of lava fragments within debris avalanche deposits is an effective tool for correlating deposits with their source volcanoes. The results also provide important insights into the collapse history of the Bandai and Nekoma volcanoes., The Geological Society of Japan
    The Journal of the Geological Society of Japan, Jan. 2026, [Reviewed]
  • A simple method to automatically remove artificial terrain from airborne LiDAR DTMs in plain areas
    Kazuki Yoshida; Mamoru Koarai, Elsevier BV
    Geomorphology, Nov. 2024, [Reviewed]
  • 〔Major achievements〕ESTIMATING 3D FOREST STRUCTURE USING LIDAR DATA FOR RISK ASSESSMENT OF SLOPE COLLAPSE CONSIDERING ROOT SYSTEM DEVELOPMENT
    M. Koarai; I. Murayama; K. Watanabe; Y. Kurihana; A. Narikiyo, Lead, International Society for Photogrammetry and Remote sensing
    The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 09 Jun. 2022, [Reviewed]
  • 苗場山頂湿原の植生変遷に関する景観生態学的研究               
    小荒井衛・阿部聖, Lead, 苗場山麓ジオパーク
    苗場山麓ジオパーク研究集録, Mar. 2022, [Invited]
  • 液状化リスク評価のための液状化被害と地形との関係性-利根川中下流域・東京湾地域の被害を対象に―               
    小荒井衛; 中埜貴元; 宇根 寛, Lead, 東京地学協会
    地学雑誌, Oct. 2018, [Reviewed], [Invited]
  • 物理探査による利根川・鬼怒川旧河道の液状化発生地域の浅部地下構造の推定
    中埜貴元; 小荒井衛; 須貝俊彦; 吉田剛,

     During the 2011 off the Pacific coast of Tohoku Earthquake, liquefaction occurred over a wide area of the Kanto plain (Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism and The Japanese Geotechnical Society, 2011), and many instances were concentrated in the former river channel and filled-up land of the old water area (Koarai et al., 2011; Wakamatsu, 2012 etc.). Observing them on a microscale, regional biases of damage to structures and distribution of sand volcanoes due to liquefaction were observed in the former river channel. In particular, in the former river channel of the Kinu River in Shimotsuma City, Ibaraki Prefecture, damage to structures at the attack slope side of the former river channel was unevenly distributed (Koarai and Nakano, 2013). One of the factors behind the uneven distribution of liquefaction damages is inferred to be the influence of the former riverbed topography, including the thickness of the former riverbed sediment and its layer structure. Therefore, to clarify subsurface structures and hydraulic conditions such as the former riverbed topography and groundwater level distribution in the former river channel, 2-D electrical resistivity imaging and ground-penetrating radar (GPR) survey were conducted across the former river channel in the downstream basin of the Tone River (Kozaki site) and the Kinu River (Kinu site). At the Kozaki site, the paleo-river channel topography of the older period was identified with 2-D electrical resistivity imaging, and the results were correlated with the results of a boring survey. However, no relationship was found between subsurface structures with 2-D electrical resistivity imaging and the distribution of liquefaction (sand volcanoes). Although the groundwater level was detected with the GPR survey, the former riverbed topography was not detected, and no relation between the results of the GPR survey and the sand volcano areas was found. At the Kinu site, the former riverbed was detected with the GPR survey. At a bent in the former river channel, it was confirmed that the former river bed is deeper at the attack slope side than the slip-off slope side. This suggests that there is a correlation between increased liquefaction damage and former riverbed depth.

    , 東京地学協会
    地学雑誌, Dec. 2017, [Reviewed]
  • MMSを用いた津波浸水深判読の有用性の検証
    岡谷隆基; 小荒井衛; 中埜貴元, 日本地図学会
    地図, Jun. 2016, [Reviewed]
  • 地球環境科学教育における技術者教育
    小荒井衛, 地学団体研究会
    地学教育と科学運動, Jun. 2016, [Reviewed]
  • 東北地方太平洋沖地震による仙台平野・石巻平野の津波被災度と地形・土地利用との関連               
    小荒井衛; 中埜貴元; 岡谷隆基, 東京地学協会
    地学雑誌, Apr. 2015, [Reviewed]
  • 地形分類情報を用いた液状化ハザード評価基準の再考               
    中埜貴元; 小荒井衛; 宇根寛, 東京地学協会
    地学雑誌, Apr. 2015, [Reviewed]
  • 設計図等を活用した3次元地理空間情報の構築とその問題点
    乙井康成; 神谷泉; 小荒井衛; 中埜貴元, 日本地図学会
    地図, Sep. 2014, [Reviewed]
  • Disaster Responses of the Geospatial Information Authority of Japan: Special Focus on Tsunami Inundation Mapping
    H. Une and M. Koarai, The Geospatial Information Authority of Japan (GSI) has put forward its best efforts to support the victims and damaged regions by surveying and providing geospatial information, for example, distributing maps and aerial photos, observing crustal movement and mapping inundation areas as quickly as possible. The “tsunami flood area overview map” it provided has been particularly useful in various geographical analyses of tsunami damage. This paper summarizes the activities of the GSI in response to the Great East Japan Earthquake of 2011 off the Pacific coast of the Tohoku region, and some of the results of its analyses of the relationship between tsunami damage and geographic conditions such as land use, elevation and land condition., 国際環境協会
    Global Environmental Research, Jun. 2014, [Reviewed], [Invited]
  • 2004年新潟県中越地震による地すべり・斜面崩壊と東山丘陵の地形発達との関係
    小松原琢; 小荒井衛; 黒木貴一; 岡谷隆基; 中埜貴元, 東京地学協会
    地学雑誌, Feb. 2014, [Reviewed]
  • Detection of landslide surface deformation triggered by the 2011 off the Pacific coast of Tohoku earthquake using InSAR image
    佐藤浩; 宮原伐折羅; 岡谷隆基; 小荒井衛; 関口辰夫; 八木浩司, 日本地すべり学会
    日本地すべり学会誌, Mar. 2014, [Reviewed]
  • 東京とその周辺の地形改変
    熊木洋太; 小荒井衛; 中埜貴元, 東京地学協会
    地学雑誌, Dec. 2013, [Reviewed]
  • 写真計測により捉えた2008年岩手・宮城内陸地震における地表面の変位量の分布
    神谷泉; 小荒井衛; 関口辰夫; 佐藤浩; 中埜貴元; 岩橋純子, SAR interferometry is widely used for dense measurements of surface displacements caused by earthquakes, but the method cannot be applied if displacements are too large. The near-epicentral area of the Iwate–Miyagi Nairiku Earthquake in 2008 is an inapplicable case. Therefore, we applied photogrammetry to measure surface displacement caused by the earthquake. The maximum horizontal and vertical displacements were found to be 5.3 m and 2.9 m, respectively.
     We recognized three lines where displacement changes abruptly. The displacement distribution is like that of a reverse fault along the first line (A–B), an east-rising fault along the second line (F–G–H; west of line A–B), and a left-lateral fault along the third line (B–C; between line A–B and line F–G–H).
     The earthquake source fault reaches or approaches the ground surface at line A–B, with slippage decreasing toward the ground surface. The fault-like large surface deformation found north of the Aratozawa Dam is on the first line. The fault-like deformation was caused by the motion of the earthquake source fault, and the relative displacement of the fault-like deformation was enlarged by local causes. A gravitational mass movement found north of the fault-like deformation is one cause.
     Because the width of the rising area is small, only 3.5 km, at the southwestern side of line B–C, the slip of the earthquake source fault is mainly distributed near the ground. Line F–G–H suggests the existence of a geological structure that causes the abrupt changes of vertical displacement without a horizontal displacement, for example a high-angle fault.
     We assumed: (1) the slip on the main fault is distributed only in a shallow area at the southern part of the main fault and only in a deep area at the northern part; and, (2) the difference of slip caused two lateral faults between southern and northern parts. The assumption qualitatively explains many observation results, such as why there is an abrupt change of horizontal displacement along line B–C and why line F–G–H has a convex part to the east.
     We found a correlation between the occurrence of large landslides and abrupt changes of displacement, in other words large surface strain. The following mechanisms are possible causes of the correlation: (1) stress from surface strain increased large landslides; (2) faults (not only the main fault) may exist under the focused areas, rupture of faults caused both large surface strain and large seismic motion, and seismic motion induced large land slides. We also found that landslides and slope failures occurred densely over the slipping area on the main fault, based on the assumptions in the previous paragraph.
     Because photogrammetric measurements need interactive observations, we could avoid observations on possible embanking areas. Because photogrammetry allows intensive measurements at interesting areas, we revealed a two flexure-like distribution of vertical displacement. Therefore, photogrammetry is an effective method for measuring surface displacement caused by an earthquake., 東京地学協会
    地学雑誌, Oct. 2013, [Reviewed]
  • Trial Production of Temporal Geospatial Dataset about Tsukuba City
    Koarai Mamoru; Nakano Takayuki, We considered the specification of temporal geospatial information, and produced a temporal geospatial dataset of the area close to Kenkyu-Gakuen Station of the Tsukuba Express in Tsukuba City. Using geospatial data of each year generated from the temporal geospatial dataset, we conducted a temporal spatial analysis of human impacts such as the development of a new traffic network and land surface change such as land use. Effective temporal spatial analysis is possible using a temporal geospatial dataset if the dataset is revised with high temporal resolution., Geographic Information Systems Association
    Theory and Applications of GIS, 30 Jun. 2013
  • 新潟県出雲崎地区における航空レーザ計測データによる森林の3次元要素の抽出               
    岡谷隆基; 乙井康成; 中埜貴元; 小荒井衛, 日本写真測量学会
    写真測量とリモートセンシング, Mar. 2013, [Reviewed]
  • The Trend of Utilization of the Satellite Imagery for Geospatial Information
    SATO Jun; KOARAI Mamoru, Japan Cartographers Association
    Map, Journal of the Japan Cartographers Association, 2013
  • Application and validation of differential SAR interferometry image to landslide detection through detailed field survey
    佐藤浩; 岡谷隆基; 中埜貴元; 小荒井衛; 岩橋純子; 宇根寛, 日本地すべり学会
    日本地すべり学会誌, 2013, [Reviewed]
  • 干渉SAR画像で抽出された初生地すべり域における詳細野外調査の結果               
    佐藤浩; 岡谷隆基; 中埜貴元; 小荒井衛; 岩橋順子; 宇根寛, 日本地すべり学会
    日本地すべり学会誌, Jan. 2013, [Reviewed]
  • 東北地方太平洋沖地震による利根川中下流域の液状化被害分布と過去の地形図・空中写真等からみる地形条件               
    小荒井衛; 中埜貴元, 地質汚染・医療地質・社会地質学会
    地質汚染・医療地質・社会地質学会誌, Dec. 2012, [Reviewed]
  • 航空レーザ計測を用いた平成23年(2011年)東北地方太平洋沖地震における液状化に伴う面的な地盤沈下量把握の可能性-千葉県浦安市の事例               
    中埜貴元; 小荒井衛; 乙井康成; 宇根寛, 地質汚染・医療地質・社会地質学会
    地質汚染・医療地質・社会地質学会誌, Dec. 2012, [Reviewed]
  • 地震による斜面崩壊危険度評価判別式「六甲式」の改良と実時間運用
    神谷泉; 乙井康成; 中埜貴元; 小荒井衛, 日本写真測量学会
    写真測量とリモートセンシング, Nov. 2012, [Reviewed]
  • Wide-area land subsidence caused by “the 2011 Off the Pacific Coast of Tohoku Earthquake
    T. Imakiire and M. Koarai
    Soils and Foundations, Oct. 2012, [Reviewed], [Invited]
  • 航空レーザによる景観生態学図の作成
    小荒井衛; 吉田剛司; 長澤良太; 中埜貴元; 乙井康成; 日置佳之; 山下亜紀郎; 佐藤浩; 司馬愛美子; 中山詩織; 西謙一, Lead, 日本地図学会
    地図, Sep. 2012, [Reviewed], [Invited]
  • 航空機搭載センサデータを用いた新宿御苑と八王子・長沼公園における温度分布の特徴
    佐藤浩; 小荒井衛, An urban cool island is a meteorological phenomenon in which the air temperature in a park or green space is lesser than that in the surrounding built-up area. Few studies have investigated the relation between tree height, landform characteristics, and temperature. In this study, 2-m-resolution brightness temperatures were measured in Shinjuku-gyoen National Garden (ca. 58ha) and around area, central Tokyo and in Naganuma Park (ca. 36ha) and around area in a suburb of Tokyo, Japan, on calm summer nights in 2005 and 2006, respectively, using an airborne thermal sensor. Tree heights were measured using an airborne LiDAR (light detection and ranging) sensor. In this garden, areas with greater tree heights were found to have higher brightness temperatures. In Naganuma Park, where a broadleaf deciduous forest extends in a hilly area, the highest temperature was observed for the southwest-facing slope; this indicates that the southwest-facing slope receives direct sunlight in the afternoon for a longer time than other sides of the slope; this leads to a difference in heat accumulation among the slope sides, in turn affecting the nighttime brightness temperature and thus maintaining thermal inertia. Furthermore, in this park, the temperature in concave landforms was lower than that in convex landforms, indicating that the air cooled by nocturnal radiation was trapped in concave landforms (cool air lake phenomenon)., 日本リモートセンシング学会
    日本リモートセンシング学会誌, Jul. 2012, [Reviewed]
  • 地上画素寸法0.5m級光学衛星画像による地物判読性能               
    中埜貴元; 小荒井衛; 峰島貞治; 賀川義昭, 日本地図学会
    地図, Jun. 2012, [Reviewed]
  • 「地理空間情報分野での人工衛星画像の利活用の動向               
    小荒井衛; 佐藤潤, 日本地図学会
    地図, Jun. 2012, [Reviewed], [Invited]
  • 地理空間情報の時空間化の検討とつくば市における試作               
    小荒井衛; 中埜貴元, Lead, 地理情報システム学会
    GIS―理論と応用, Jun. 2012, [Reviewed]
  • ALOS/PALSAR干渉画像による秋田県東成瀬地区地すべりのモニタリング               
    岡谷隆基; 佐藤浩; 中埜貴元; 小荒井衛, 日本写真測量学会
    写真測量とリモートセンシング, Mar. 2012, [Reviewed]
  • Characteristics of Brightness Temperature Distribution in Shinjuku-gyoen National Gardenand Naganuma Park, Tokyo Using Airborne Thermal Sensor Data
    P. SATO Hiroshi; KOARAI Mamoru, An urban cool island is a meteorological phenomenon in which the air temperature in a park or green space is lesser than that in the surrounding built-up area. Few studies have investigated the relation between tree height, landform characteristics, and temperature. In this study, 2-m-resolution brightness temperatures were measured in Shinjuku-gyoen National Garden (ca. 58ha) and around area, central Tokyo and in Naganuma Park (ca. 36ha) and around area in a suburb of Tokyo, Japan, on calm summer nights in 2005 and 2006, respectively, using an airborne thermal sensor. Tree heights were measured using an airborne LiDAR (light detection and ranging) sensor. In this garden, areas with greater tree heights were found to have higher brightness temperatures. In Naganuma Park, where a broadleaf deciduous forest extends in a hilly area, the highest temperature was observed for the southwest-facing slope; this indicates that the southwest-facing slope receives direct sunlight in the afternoon for a longer time than other sides of the slope; this leads to a difference in heat accumulation among the slope sides, in turn affecting the nighttime brightness temperature and thus maintaining thermal inertia. Furthermore, in this park, the temperature in concave landforms was lower than that in convex landforms, indicating that the air cooled by nocturnal radiation was trapped in concave landforms (cool air lake phenomenon)., The Remote Sensing Society of Japan
    Journal of The Remote Sensing Society of Japan, 2012
  • Study on detection of landslide-induced surface deformation using SAR interferograms-Case study in Mt. Gassan area, Yamagata Pref., Japan-
    佐藤浩; 岡谷隆基; 小荒井衛; 鈴木啓; 飛田幹男; 矢来博司; 関口辰夫, Monitoring of ground surface deformation is important for determining and implementing effective measures against landslide disasters. Synthetic aperture radar interferometry (InSAR) is a promising monitoring technique that can detect surface deformation in wide areas at the centimeter scale. The present study aimed to interpret landslide deformation using InSAR images that cover the Shimekake landslide area in Yamagata Prefecture, Japan. The study area consists of gentle slopes (approx. 10°) facing southwest direction and predominantly lies on Neogene mudstone. Landslides in the area were triggered by snowmelt. InSAR images were produced from Advanced Land Observing Satellite (ALOS) /Phased Array L-band SAR (PALSAR) data that were measured from ascending/descending orbit (viewed above from west/east) . For detecting landslide deformations, we selected the data measured between June 2006 and October 2008 because it displayed the best coherence among the available archived PALSAR data. Previous 2.5-dimensional analysis revealed east-west and vertical displacement using InSAR images obtained from both ascending (northward) and descending (southward) orbits. We compared the displacement estimated by InSAR with that measured by GPS between December 2009 and March 2010. The comparison revealed that westward displacement in the entire landslide area and subsidence at the landslide scar identified by InSAR was coincident with that of the GPS measurements. Although no GPS data were available between June 2006 and October 2008, it is thought that the same landslide deformation has continued since June 2006. Therefore, we concluded that the InSAR images successfully detected landslide deformation in the study area. Notably, however, uplifting displacement detected at the foot of the landslide was not coincident with that of the GPS measurements, and the discrepancy was possibly due to a partial phase-unwrapping error in the InSAR image obtained from the ascending orbit. Despite the detection of false displacement, it was found that InSAR can serve as an effective reconnaissance tool for the monitoring of subtle landslide deformations over wide areas and is expected to support the location planning of GPS survey equipment in the field for effective landslide deformation measurements., 日本地すべり学会
    日本地すべり学会誌, Mar. 2012, [Reviewed]
  • Development of support system to evaluate stability of the artificial fills for housings during earthquake
    中埜貴元; 小荒井衛; 星野実; 釜井俊孝; 太田英将, 日本地すべり学会
    日本地すべり学会誌, Jul. 2012, [Reviewed]
  • InSAR-derived crustal deformation and fault models of normal faulting earthquake (M-j 7.0) in the Fukushima-Hamadori area
    Tomokazu Kobayashi; Mikio Tobita; Mamoru Koarai; Takaki Okatani; Akira Suzuki; Yuko Noguchi; Masayuki Yamanaka; Basara Miyahara
    EARTH PLANETS AND SPACE, 2012, [Reviewed]
  • 知床半島と中国山地の景観生態学図
    小荒井衛; 乙井康成; 中埜貴元; 佐藤浩; 吉田剛司; 山下亜紀郎; 長澤良太; 日置佳之, 日本地図学会
    地図, Dec. 2011, [Reviewed]
  • 井戸沢断層に沿って出現した地表地震断層に対する地上3次元レーザスキャナー計測               
    岡谷隆基; 小荒井衛, 日本写真測量学会
    写真測量とリモートセンシング, Nov. 2011, [Reviewed]
  • 日本におけるジオパーク活動の展開と地図の活用
    目代邦康; 小荒井衛, In Japan, geoparks were initiated around 2004. Twenty areas became members of the Japan Geopark Network by September 2011. One of the activities in these geoparks is the creation of various maps, out of which several show the location of geosites and their access routes. Such maps are a form of tourist maps. Some maps explain the geology and landform of an area: they are highly important for initiating scientific activity in geoparks. Thus far, scientific maps explaining the landform and geology of an area have been created by geoscientists, but their information contained in these maps is not reflected in geopark maps. The availability of intelligible scientific maps can aid visitors to geoparks in experiencing a high-quality geotour. However, for creating such effective scientific maps, it is necessary for geoscientists to work in cooperation with geopark managers., 日本地図学会
    地図, Sep. 2011, [Reviewed]
  • 『国土変遷アーカイブデータを活用した多摩丘陵での植生遷移の把握』『               
    小荒井衛; 長谷川裕之; 杉村尚; 吉田剛司, 地理情報システム学会
    GIS−理論と応用, Jun. 2011, [Reviewed]
  • 3D laser scanner measurement of displacement appeared along the Idosawa fault
    小荒井 衛; 岡谷 隆基, Normal fault type earthquake (M7.0) was occurred at Fukushima-ken Hamadouri area on 11th April 2011. A lot of displacements with this earthquake were appeared along the Idosawa fault in the inland area of Iwaki city locates in the southeast of Fukushima prefecture. The maximum displacements reach into 2m are seen around Shionohira settlement. 3D laser scanner measurement was done near the settlement. Measurement results provided us precise surface image of distribution of displacements. Not only obvious gaps at the field, but unrecognizable flexure are able to be figured out, which cannot be measured by discrete survey with leveling rod or other surveying instruments. This precise surface image is expected to give us a figure of geomorphological process by the earthquake., Japan Society of Photogrammetry and Remote Sensing
    Journal of the Japan society of photogrammetry and remote sensing, 2011
  • Social Contribution of Remote Sensing Technology in the Field of Urban Environment, Civil Engineering and Construction
    KOARAI Mamoru, The Remote Sensing Society of Japan
    Journal of The Remote Sensing Society of Japan, 2011
  • 中国山地の鉄穴流し跡地における航空レーザ計測を用いた景観生態学的研究
    小荒井衛; 中埜貴之; 佐藤浩; 長澤良太; 日置佳之; 司馬美愛子; 中山詩織, 日本リモートセンシング学会
    日本リモートセンシング学会誌, Jan. 2011, [Reviewed]
  • 国土地理院における高解像度DEMの整備とそれを活用した地理情報解析研究—Preparation of high-resolution digital elevation models by the Geospatial Information Authority of Japan and their applications to geographic information analysis
    佐藤 浩; 岩橋 純子; 小荒井 衛, コレクション : 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > 学術機関 > 学協会, 宇治 : 日本地形学連合
    地形 = Transactions, Japanese Geomorphological Union / 日本地形学連合 編, Oct. 2010
  • Development of the tapes embedded with RFID for indoor-outdoor seamless positioning and its practical test
    KAMIYA Izumi; KOARAI Mamoru, Active RFID (Radio Frequency ID) systems are used for positioning. For easy installation of RFID tags, we embedded them in tape. Power is supplied to all the tags by a battery assembly, which reduces the work of battery replacement. The power cable also functions as antennas. One-dimensional positioning accuracy was found to be roughly the same as the tag interval. The tape was adapted to outdoor-use and tested at and around the Nagareyama-Ootakanomori Station., Geographic Information Systems Association
    Theory and Applications of GIS, 30 Jun. 2010
  • Three Dimensional Vegetation Structure Map Using LIDAR Data
    KOARAI Mamoru; P. SATO Hiroshi; NAKANO Takayuki, The authors have produced various types of landscape ecological maps. Basic legend of landscape ecological maps consists of the combination of vegetation classification and landform classification.
    The airborne laser survey (LIDAR Survey) is expected for the tool of producing landscape ecological map of forest area. Because, last pulse LIDAR data in winter season is useful for detection of micro landform under forest area, and vegetation classification has been down using three dimensional vegetation structure detected by the difference between LIDAR data in summer and winter seasons. In this paper, the authors introduce the trial produce of three dimensional vegetation structure maps by LIDAR (LIDAR vegetation map) in two different type areas. One is Shinjuku Gyoen Park, where is typical city park in Tokyo Metropolitan area. Another is the south east foot of Mt. Rausu of Shiretoko Peninsula, where is Natural Heritage Area of Japan, Hokkaido Island.
    On Shinjuku Gyoen Park, the authors got 1m grid DSM (Digital Surface Model) and DEM (Digital Elevation Model) in summer season and 1m grid DEM in winter season by LIDAR survey. On south east foot of Mt. Rausu, the authors got 0.5m grid DSM and DEM in summer season and 2m grid DSM and DEM in spring or autumn season.
    Algorithm of producing LIDAR vegetation maps is as follows. For vegetation classification, the authors used three dimensional vegetation structures such as vegetation height, thickness of crown, and the difference of single layer deciduous forests, double layers deciduous forest and evergreen forest. Using these vegetation structures, it is possible to classify vegetation map with eleven categories legend. In this paper, the authors show 1m grid LIDAR vegetation maps of Shinjuku Gyoen Park and south east foots of Mt. Rausu.
    The results of comparison between LIDAR vegetation map and Actual Vegetation Map with 1/25,000 scale by the Ministry of Environment shows that LIDAR vegetation map is corresponding to Actual Vegetation Map. The results of comparison between LIDAR vegetation map and ground troth data shows that LIDAR vegetation map is corresponding to ground truth data in city park, but LIDAR vegetation map is not corresponding to ground truth in natural forest, because of the size difference between crown size of tree and grid side of LIDAR vegetation map., Japan Cartographers Association
    Map, Journal of the Japan Cartographers Association, 2010
  • Geoecological Mapping in Tomari-no-tai, Shirakami Mountains Using Airborne LiDAR Data and Hyper Spectral Sensor Data
    佐藤 浩; 小荒井 衛; 宇根 寛; 八木 浩司; 牧田 肇, The Association of Japanese Geographers
    Geographical review of Japan series A, 2010
  • SAR干渉画像で捉えた2007年(平成19年)新潟県中越沖地震による地盤変状と活褶曲の成長               
    小荒井 衛; 宇根 寛; 西村卓也; 矢来博司; 飛田幹男; 佐藤 浩
    地質学雑誌, 2010, [Reviewed]
  • 航空レーザ計測による植生三次元構造を反映した植生図の作成
    小荒井衛; 佐藤浩; 中埜貴元
    地図, 2010, [Reviewed]
  • GIS Analysis about Earthquake Hazard Risk on Coastal Zone using Landform Classification and Boring Data
    SATO Hiroshi; KOARAI Mamoru, ABSTRACT : Land condition maps are recently published as vector data format by Geographical Survey Institute, and then it is easy to analyses combing variable national land data using GIS. In this study, the authors analyze the relationship between landform classification and disaster damages to combine the vector data of land condition maps and the information of earthquake damage distribution using GIS, especially case of the 1944 Tou-Nankai Earthquake in Tokai District. On terrace or fluvial fan, housing damages are relatively small. And on valley plain or flood plain, coastal plain or delta and natural levee, housing damages are relatively large. As the results of GIS analysis using boring data, there are heavy building damages on the soft mud deposited area. These results show that it is important to consider the landform evolution., Japanese Association for Coastal Zone Studies
    Journal of Coastal Zone Studies, 30 Sep. 2009
  • 陸域観測技術衛星「だいち」による災害観測—Disaster monitoring using the ALOS "Daichi" satellite—小特集 暮らしと地球環境を守るための衛星技術
    小荒井 衛; 矢来 博司, 資料形態 : テキストデータ プレーンテキスト
    コレクション : 国立国会図書館デジタルコレクション > デジタル化資料 > 雑誌, 東京 : 電子情報通信学会
    電子情報通信学会誌 = The journal of the Institute of Electronics, Information and Communication Engineers, Sep. 2009
  • Interpretation of geological hazard using high-resolution optical satellite imagery:: Comparison of interpretation characteristics of satellite images
    Koarai Mamoru; Sato Hiroshi P.; Une Hiroshi; Amano Kazuo, We analyzed large-scale geological hazards in the case of the Northern Pakistan Earthquake, the Middle Java Earthquake and the Leyte landslide, using optical high-resolution satellite imagery such as QuickBird, IKONOS, ALOS PRISM and SPOT5. The characteristics of satellite images were compared to those of disasters on the interpretation cards. It is possible to recognize large collapses using 2.5 m-resolution satellite images; however 1 m-resolution satellite images are necessary for small-scale collapses and cracks. For the recognition of building damages in the urban area, 1 m-resolution stereo images are necessary; however it is impossible by 1 m-resolution mono image. For surface earthquake faults, it is useful to combine the recognition of building heavy damaged area using 1 m-resolution satellite image, and the identification of cliff landforms using 2.5 m-resolution stereo images. In order to understand hazard conditions, it is important for satellite imagery to be not only of high resolution but also stereoscopic.
    We proposed a method for recognition of large-scale geological hazards using optical high-resolution satellite imagery., The Geological Society of Japan
    The Journal of the Geological Society of Japan, 15 Dec. 2008
  • Episodic growth of fault-related fold in northern Japan observed by SAR interferometry
    Takuya Nishimura; Mikio Tobita; Hiroshi Yarai; Tomomi Amagai; Midori Fujiwara; Hiroshi Une; Mamoru Koarai
    GEOPHYSICAL RESEARCH LETTERS, Jul. 2008, [Reviewed]
  • Geomorphological study of the Leyte debris avalanche using satellite imagery remote sensing
    小荒井衛; 佐藤浩; 新井場公徳; 小山内信智; 伊藤英之, Lead, Geomorphologic characteristics of the Leyte debris avalanche occurred on 17th Feb. 2006 in Philippine was detected using high-resolution satellite imageries. Especially, the shape of hummocks was measured using ALOS PRISM stereo imageries, and was analyzed by GIS compared with the hammocks of Bandai Volcano. As the result, it is clear that the relationship between volume of collapse and size of hummocks between flow distance and long axis direction of hummocks., The Japan Landslide Society
    日本地すべり学会誌, 2008, [Reviewed]
  • Geographic Information Analysis of a Hazard Map of Bandai Volcano Using a Landform Classification Map and Digital Elevation Models
    KOARAI Mamoru, This paper analyzes a volcanic hazard map using grid DEMs and vector GIS data, such as landform classification polygons shown on the Land Condition Map of Bandai Volcano which was published by the Geographical Survey Institute. The hazard areas described on the hazard map of Bandai Volcano, landform classification on a land condition map and morphometric data derived from 50-m and 10-m grid DEMs were overlaid using GIS. The results indicate that the expected hazard areas on the hazard map correspond to the past hazard areas shown on the land condition map. Because large-scale collapses of the volcanic body occurred many times as major processes of landform evolution, the areas underlain by past debris avalanche deposits shown on the land condition map are important for discussing disaster prevention. The result of the landform analysis using the 50-m DEM corresponds to a rough landform classification, whereas the result using the 10-m DEM reflects micro-scale landforms., Tokyo Geographical Society
    Journal of Geography (Chigaku Zasshi), 2008, [Reviewed], [Invited]
  • 宅地防災対策への時系列地理情報の利活用
    小荒井 衛; 長谷川 裕之, The Association for the Geological Collaboreation in Japan
    Chigakukyoiku and Kagaku-undo, 2008
  • SLOPE COLLAPSE, SURFACE DEFORMATION AND GROWTH OF ACTIVE FOLD BY THE NIIGATAKEN CHUETSU-OKI EARTHQUAKE IN 2007, CHUETSU DISTRICT, CENTRAL JAPAN
    Mamoru Koarai; Hiroshi Une; Hiroshi P. Sato
    SGEM 2008: 8TH INTERNATIONAL SCIENTIFIC CONFERENCE, VOL II, CONFERENCE PROCEEDINGS, 2008, [Reviewed]
  • Crustal deformation and a preliminary fault model of the 2007 Chuetsu-oki earthquake observed by GPS, InSAR, and leveling
    Takuya Nishimura; Mikio Tobita; Hiroshi Yarai; Shinzaburo Ozawa; Makoto Murakami; Toru Yutsudo; Masayoshi Ishimoto; Takeshi Umesawa; Takashi Toyofuku; Satoshi Kawamoto; Tomomi Amagai; Midori Fujiwara; Akira Suzuki; Syunji Enya; Toshiyuki Sasaki; Masanori Yokokawa; Syuichi Oomori; Setsuo Tanoue; Hisao Ikeda; Moriyuki Nemoto; Hisashi Suito; Fumi Hayashi; Hiroshi Une; Mamoru Koarai; Masaharu Tsuzawa
    EARTH PLANETS AND SPACE, 2008
  • 平成19年(2007年)新潟県中越沖地震による建物被害と地盤変状-航空レーザデータを活用した地盤変状の把握               
    小荒井 衛; 長谷川裕之; 佐藤 浩; 宇根 寛
    地質汚染―医療地質-社会地質学会誌, 2008, [Reviewed]
  • 2008年岩手・宮城内陸地震における荒砥沢ダム北方の水平変位
    神谷 泉; 小荒井衛; 関口辰夫; 岩橋純子; 中埜貴元
    写真測量とリモートセンシング, 2008, [Reviewed]
  • Interpretation of landslide distribution triggered by the 2005 Northern Pakistan earthquake using SPOT 5 imagery
    Hiroshi P. Sato; Hiroyuki Hasegawa; Satoshi Fujiwara; Mikio Tobita; Mamoru Koarai; Hiroshi Une; Junko Iwahashi
    LANDSLIDES, May 2007, [Reviewed]
  • Special Session:What Geomorphologists Clarified Regarding the 2005 Pakistan Earthquake
    SUZUKI Yasuhiro; UNE Hiroshi; KUMAHARA Yasuhiro; NAKATA Takashi; KUMAKI Yohta; FUJIWARA Satoshi; TOBITA Mikio; SATO P. Hiroshi; OZAWA Shinzaburo; SATO Hiroshi; KOARAI Mamoru; KANEDA Heitaro; AWATA Yasuo; KONDO Hisao; TSUTSUMI Hiroyuki; SUGITO Nobuhiko; AKHTAR Sardar S.; KHATTAK Waliullah; KHAN Majid; AWAN Adnan A., The Association of Japanese Geographers
    Geographical review of Japan series A, 2006
  • Interpretation of high-resolution satellite imageries to detect the landform changes and disaster damages - Case study of the northern Pakistan earthquake
    Mamoru Koarai; Hiroshi P. Sato; Hiroshi Une; Izumi Kamiya, Lead
    DISASTER FOREWARNING DIAGNOSTIC METHODS AND MANAGEMENT, 2006, [Reviewed]
  • Satellite data gives snapshot of the 2005 Pakistan earthquake
    Satoshi Fujiwara; Mikio Tobita; Hiroshi P. Sato; Shinzaburo Ozawa; Hiroshi Une; Mamoru Koarai; Midori Fujiwara; Hiroshi Yarai; Takuya Nishimura; Fumi Hayashi, American Geophysical Union
    Eos, 2006, [Reviewed]
  • Evaluation of Combined Phase Ambiguity Solution Method on GPS Assisted Aerial Triangulation.
    URABE Bokuro; NOGUCHI Mayumi; KOARAI Mamoru, Aerial triangulation, in which the transformation parameters of central projection are solved from observed photograph coordinates of orientation points and ground control points using the least square method, has become a popular technology in the field of topographical survey by the help of computers. On the other hand, the process of field survey to establish photo signals (control point survey) has been remained as a laborious work (Ackermann, 1990) . Recently, the technology to utilize the coordinates of the aerial camera at each shot given by kinematic GPS observation into aerial triangulation has been developed, and thus the number of required photo signals can be dramatically reduced. In this paper, the authors compared two methods of GPS-assisted aerial triangulation with conventional methods. Namely, early established Shift Drift method and a newly developed Combined Phase Ambiguity Solution (CPAS) method are compared with Bundle and Independent Model adjustment methods. Also, a trial case to implement a block adjustment without any ground control points using CPAS method will be discussed., Japan Society of Photogrammetry and Remote Sensing
    Journal of the Japan society of photogrammetry and remote sensing, 2001, [Reviewed]
  • The Technique of Temporal Management for Spatial Data-framework (Digital Map 2500)
    KADOWAKI Toshihiro; NAKAMINAMI Kiyoaki; KOARAI Mamoru, This paper aims to show the technique of temporal management for spatial data-framework of GIS that is Digital Map 2500. It is the technique of updating in order to keep the latest condition and store the temporal information without erasing former information. And we arranged the requisite for real time updating using differential information. We verified the technique by developing the prototype-system that was used at updating of Digital Map 2500., Geographic Information Systems Association
    Theory and Applications of GIS, 2001, [Reviewed]
  • The update of the 1/25,000 topographical map by using simple type mobile survey system.
    AKUTSU Osamu; URABE Bokuro; KOARAI Mamoru; SHIBASAKI Ryosuke, As acquisition of the position coordinate data of 2 dimensions or 3 dimensions needs time and labor, recently some real time acquisition of the GIS data using electronic flat board and GPS has been introduced. However, because it is using GPS, there are many problems the system itself is quite expensive, and it is impossible to acquire data in the urban area.
    Therefore, to acquire the position data easily and rapidly in the urban area where the data acquisition is difficult, a simple type mobile interface system is developed. It consists of the laser, gyro, electronic compass (the magnetic azimuth sensor) and DGPS. It controls all the data with one personal computer and it acquires data., Japan Society of Photogrammetry and Remote Sensing
    Journal of the Japan society of photogrammetry and remote sensing, 2001, [Reviewed]
  • 航空機SARを用いた急峻地形地におけるDEMの抽出とその応用
    岡谷隆基; 小荒井衛; 茂木公一; 渡辺信之; 山田陽子; 松尾 馨
    写真測量とリモートセンシング, 2001, [Reviewed]
  • Grid map analysis and its application for detecting vegetation changes in Japan
    Nobukazu Nakagoshi; Mutsumi Hikasa; Mamoru Koarai; Toshiyuki Goda; Isao Sakai, Abstract. Grid maps are used as a basic vegetation data base in Japan; they are simplified from vector‐based vegetation maps. We estimated the frequency error or lack of information corresponding to reduced resolution and examined the reliable limits of this data base. We produced 10 grid maps on five different scales from 50 m to 1000 m using two different methods using both the whole cell (W‐method) and only the central circle (C‐method) from a vegetation map at scale 1: 25 000. We found that patches larger than the area of a cell on a vector‐based map could be kept almost certainly on any map, but many patches of less than the cell size were lost. The number of missing patches with the C‐method is fewer at every scale than those with the W‐method. Though the value of Morisita's Cλ (p) index showed that the similarity with the original map was high ‐ from the 50‐m to the 200‐m resolution ‐ it was increasingly lower on the 400‐m and 1000‐m grid maps. The values of the Shannon index on the original map, 50‐m and 100‐m grid maps were not different, but they decreased from the 200‐m to 1000‐m grid maps. Because the vegetation data base of the Japanese Environment Agency used a 1000‐m C‐method grid map, we found that much information on patches less than 100 ha had disappeared. Information about dominant vegetation or large patches is almost accurate in this data base., Wiley
    Applied Vegetation Science, 24 Feb. 1998, [Reviewed]
  • Distribution maps of Coral Reefs
    Koarai Mamoru; Kusumi Yutaka, Lead, Japan Cartographers Association
    Map, Journal of the Japan Cartographers Association, 1997, [Reviewed]
  • Natural Environment GIS
    KOARAI Mamoru, Japan Cartographers Association
    Map, Journal of the Japan Cartographers Association, 1997, [Reviewed]
  • The Geologic and Topographic Conditions of Reclaimed Lands affecting the Distribution of Liquefied Sites -A Case Study on the Coastal Area of Tokyo Bay by the 1987 East Off Chiba Prefecture Earthquake -
    KOARAI Mamoru; NAKAYAMA Toshio, Lead, The East Off Chiba Prefecture Earthquake occurred on December 17, 1987, was the first earthquake hazard attacked Tokyo Metropolitan area, since the 1923 Kanto Earthquake . Liquefaction phenomena occurred on the wide area, such as Kujyukuri plain, Tone -River lowland and Tokyo -Bay coastal area, comparing with the magnitude of the earthquake (M=6.7).

    Authors investigated the liquefaction phenomena on Tokyo -Bay coastal reclamation area . As the reclaimed area have increased with high speed on the coast of Tokyo -Bay area, it is important for disaster prevention on coastal area to know the places where liquefaction phenomena occurred .

    We mainly analyzed boring log data and interpreted aerial photograph. Since this earthquake was on the boundary line of the liquefaction phenomena due to this earthquake, this phenomena concentrated on undesirable geological condition. As the result of the investigation, liquefaction phenomena occurred on the following geological conditions.

    1 Buried valley.

    2 Fairway before reclamation.

    3 Channel during reclamation work.

    Common characteristic of these geological conditions is the existance of newly deposited thick sediment covering the ditch topography., Japanese Association for Coastal Zone Studies
    Journal of JACZS, 1996, [Reviewed]
  • Identification of Widespread Tephras in and around Bandai Volcano,Northeast Japan
    SUZUKI Takehiko; KIMURA Jun-ichi; SODA Tsutomu; CHIBA Shigeki; KOARAI Mamoru; ARAI Fusao; YOSHINAGA Shuichiro; TAKADA Masashi, Tokyo Geographical Society
    Journal of Geography (Chigaku Zasshi), 25 Aug. 1995, [Reviewed]
  • History of landform development. ( Ministry of Construction Geographical Survey Inst. S ).
    小荒井衛; 千葉茂樹
    建設省国土地理院地理調査部研究報告, 1995
  • On the time of occurrence of Sarashina pumice flow. ( Ministry of Construction Geographical Survey Inst. S ).
    小荒井衛; 千葉茂樹
    建設省国土地理院地理調査部研究報告, 1995
  • Petrological study on the origin of debris flow sediment. ( Geographical Survey Inst., The Ministry of Construction S ).
    小荒井衛; 清水順二
    建設省国土地理院地理調査部研究報告, 1995
  • Investigation of landform disaster materials in U.S.A.. ( Geographical Survey Inst., The Ministry of Construction S ).
    小荒井衛; 星野実
    建設省国土地理院地理調査部研究報告, 1995
  • Terrain restoration of Bandai Volcano before the 1888 Collapse.
    水越博子; 星野実; 小荒井衛; 津沢正晴
    磐梯火山 防災研究の進展にむけて 平成7年, 1995
  • Analysis on tephra around Mt. Bandaisan. ( Geographical Survey Inst., The Ministry of Construction S ).
    小荒井衛; 早田勉
    建設省国土地理院地理調査部研究報告, 1995
  • Restoration of ”Figure of Mt. Bandaisan”. ( Geographical Survey Inst., The Ministry of Construction S ).
    水越博子; 星野実; 村上広史; 小荒井衛; 津沢正晴; 米地文夫; 中村洋一
    建設省国土地理院地理調査部研究報告, 1995
  • Preparation of volcanic landform classification map ”Mt. Bandaisan”. ( Geographical Survey Inst., The Ministry of Construction S ).
    星野実; 津沢正晴; 村上広史; 小荒井衛; 鈴木勝義; 関口辰夫; 大谷知生; 水越博子; 湯本景一
    建設省国土地理院地理調査部研究報告, 1995
  • 磐梯山の地形発達史
    小荒井衛
    科学技術庁科学技術振興調整費「火山地域における土砂災害予測手法の開発に関する国際共同, 1995
  • Landform restoration of Bandai volcano to the landform before the collapse in 1888. (Ministry of Construction,Geographical Survey Inst. S).
    水越博子; 星野実; 米地文夫; 中村洋一; 津沢正晴; 小荒井衛; 大谷知生; 北原敏夫; 竹田裕子
    建設省国土地理院地理調査部研究報告, 1994
  • TDebris flow in north foot of Bandai volcano - comments on landform restoration results. ( Ministry of Construction Geographical Survey Inst. S )
    小荒井衛; 米地文夫; 竹田裕子; 中村洋一; 田中耕平
    建設省国土地理院地理調査部研究報告, 1994
  • Debris and sediment at the south foot districts of Bandai volcano. (Ministry of Construction, Geographical Survey Inst. S).
    小荒井衛; 星野実; 津沢正晴; 大谷知生; 水越博子; 中村洋一; 鈴木毅彦; 千葉茂樹; 早田勉
    建設省国土地理院地理調査部研究報告, 1994
  • Analysis of the Consciousness about Sea on "the song of Sea"
    KOARAI Mamoru; IZUMI Yohta, Lead, The existence of the consciousness about sea on the Japan'n songs and the transition of it on each period are investigated for the analysis of keywords on those songs.

    From the result, the characteristic changes are recognized, such as the decrease of words related navigation, the changes of place name used on each genre and each period and so on. These changes show the transition of people's consciousness of sea depended on the changes of social background on each period., Japanese Association for Coastal Zone Studies
    Proceedings of JACZS, 1994, [Reviewed]
  • Research and development of a system for prevention of landslide disasters.( Sponsor : Ministry of Construction Geographical Survey Inst. )
    津沢正晴; 原口和政; 関口辰夫; 岩橋純子; 小荒井衛
    建設省国土地理院地理調査部研究報告, 1993
  • Method for Understanding the Characteristic of Coastal Zone from Historical and Geographical Viewpoint.
    Mamoru KOARAI; Tamotsu SAITO; Tokumaru WATANABE; Yota IZUMI, Lead
    Jour. Japan Assoc. Coastal Zone Studie, 1993, [Reviewed]
  • 地形図の比較による全国の海岸線変化
    田中 茂信; 小荒井 衛; 深沢 満, 公益社団法人 土木学会
    海岸工学論文集, 1993, [Reviewed]
  • 14C Age of the Last Event along the Futaba (Ohgai) Fault at Kashima Town, Northeast Japan
    SUZUKI Takahiko; KOARAI Mamoru, THE TOHOKU GEOGRAPHICAL ASSOCIATION
    Annals of The Tohoku Geographycal Asocciation, 1990, [Reviewed]
  • Outcrops and recent event of Futaba Fault (Ohgai Fault) at Kashima Town in Fukushima Prefecture, Northeast Japan.
    SUZUKI Takahiko; KOARAI Mamoru, Japanese Society for Active Fault Studies
    Active Fault Research, 1989, [Reviewed]

MISC

Books and other publications

  • 日本の活断層総覧 = Comprehensive atlas of active faults in Japan
    宮内, 崇裕; 堤, 浩之; 石山, 達也; 楮原, 京子; 金田, 平太郎; 後藤, 秀昭; 田力, 正好; 廣内, 大助; 松多, 信尚, Contributor
    東京大学出版会, Dec. 2025
    9784130607704
  • 〔Major achievements〕リモートセンシング事典               
    日本リモートセンシング学会, Contributor
    丸善出版, 30 Dec. 2022, [Reviewed]
    9784621307762
  • 〔Major achievements〕茨城県北ジオブック               
    茨城県北ジオパーク推進協議会; 茨城大学茨城県北ジオパーク委員会, Editor
    茨城新聞社, 17 Sep. 2022
    9784872734683
  • 日本列島地質総覧 地史・地質環境・資源・災害               
    加藤禎一・脇田浩二・斉藤眞・高木哲一・水野清秀・宮崎一博 編, Contributor
    朝倉書店, 01 Jun. 2022, [Reviewed]
    9784254162776
  • 地図の事典               
    日本地図学会監修, Contributor
    朝倉書店, 01 Nov. 2021, [Reviewed]
    9784254163582
  • 防災・環境のためのGIS               
    山岸宏光編著, Joint work
    古今書院, Aug. 2018
  • Monitoring and Modelling of Global Changes: A Geomatics Perspective. Springer Remote Sensing/ Photogrammetry               
    Li J.; Yang X, Joint work
    Springer, 2015
  • 東日本大震災合同調査報告.共通編3地盤災害               
    東日本大震災合同調査報告書編集委員会, Contributor
    丸善出版, Jun. 2014
  • 空間情報による災害の記録               
    日本写真測量学会編, Contributor
    鹿島出版会, Sep. 2012
  • 測量用語事典               
    測量用語辞典編集委員会編, Contributor
    東洋書店, Jul. 2011
  • 沿岸域環境事典               
    日本沿岸域学会, Contributor
    共立出版, Jul. 2004

Lectures, oral presentations, etc.

  • 常時微動計測で把握した恋瀬川低地の地形発達史と地盤災害リスクの検討               
    小荒井衛; 影山蒼; 先名重樹; 中野早登; 川村直樹
    日本地理学会2026年春季学術大会, 27 Mar. 2026
    20260326, 20260327
  • 歴史史料から復元した近世以降の利根川中流域および渡良瀬川下流域における洪水氾濫特性の地形学的検討               
    田口陽菜; 小荒井衛; 米田夕夏
    国文学研究資料館・茨城大学GLEC 共同シンポジウム 歴史資料・古典籍を活用した減災・気候変動研究, 17 Mar. 2026, [Invited]
    20260317, 20260317
  • 福島県中央部,磐梯火山南西麓に分布する岩屑なだれ堆積物の特徴               
    古庄航輝; 小荒井衛
    日本地質学会第132年学術大会, 16 Sep. 2025
    20250914, 20250916
  • 常時微動計測は活断層研究にどこまで適用可能か               
    小荒井衛; 金子朋紀; 中島 展之; 先名 重樹
    日本地質学会第132年学術大会, 15 Sep. 2025
    20250914, 20250916
  • 活断層の活動履歴を常時微動計測から探る               
    小荒井衛
    190回地理地殻活動研究センター談話会, 12 Sep. 2025, [Invited]
    20250912, 20250912
  • 土と水を対象とした衛星画像・ドローンを用いたアプローチ               
    小荒井衛
    防災推進国民大会2025(ぼうさいこくたい2025), 07 Sep. 2025, [Invited]
    20250906, 20250907
  • 常時微動観測と露頭調査による信濃川中流域の地形発達過程の検討               
    佐藤ひとみ; 小荒井衛; 杉元海渡; 先名重樹
    第79回地学団体研究会総会(高田), 30 Aug. 2025
    20250829, 20250831
  • 2004 年新潟県中越地震の斜面崩壊地における地形や地質構造等のGIS 解析               
    中村天嶺; 小荒井衛
    第79回地学団体研究会総会(高田), 30 Aug. 2025
    20250829, 20250831
  • 常時微動観測により把握した小千谷市南部周辺の地下構造と活構造の活動性               
    杉元海渡; 小荒井衛; 佐藤ひとみ; 先名重樹
    第79回地学団体研究会総会(高田), 30 Aug. 2025
    20250829, 20250831
  • Relationship between topography and decrease of wetland on the top of Mt. Naeba, Central Japan               
    Seren Teduka; Mamoru Koarai; Natsuki Sasaki
    JPGU2025, 29 May 2025
    20250525, 20250530
  • Creation of a geocycling map on the Mt. Tsukuba Regional Geopark: Examples of Hojo and Konda District, Tsukuba City, Ibaraki Prefecture               
    Akira Igarashi; Mamoru Koarai; Shigeki Senna
    JPGU2025, 29 May 2025
    20250525, 20250530
  • The relationship between inundation characteristics and topography in northeastern Saitama Prefecture since Edo period, as reconstructed from historical records.               
    Koudai Saotome; Mamoru Koarai
    JPGU2025, 28 May 2025
    20250525, 20250530
  • Sources and emplacement mechanisms of debris avalanche deposits at the foot of Bandai and Nekoma volcanoes, Central Fukushima Prefecture, Japan               
    Koki Furusho; Mamoru Koarai
    JPGU2025, 27 May 2025
    20250525, 20250530
  • Past activity of Shionohira Fault estimated by micro tremor observation, Iwaki City, North-East Japan               
    Mamoru Koarai, Tomoki Kaneko, Shigeki Senna, Kazuki Yoshida
    JPGU2025, 26 May 2025
    20250525, 20250530
  • Estimation of ground structure around the former river channels in the Kinu district of Shimotsuma City and the Yoshino district of Joso City, using microtremor observation               
    Mitsuki Akazawa; Mamoru Koarai; Shigeki Senna
    JPGU2025, 25 May 2025
    20250525, 20250530
  • Relationship between rock strength determined by Schmidt hammer, landslides and geology - An example of the 2004 Mid-Niigata Prefecture Earthquake               
    Amane Nakamura; Mamoru Koarai
    The General Meeting of the Association of Japanese Geographers, Spring 2025, 20 Mar. 2025
    20250319, 20250321
  • A simple method to automatically remove artificial terrain from airborne LiDAR DTMs in plain areas               
    Kazuki Yoshida; Mamoru Koarai
    The General Meeting of the Association of Japanese Geographers, Spring 2025, 19 Mar. 2025
    20250319, 20250321
  • Fault location and geomorphological evolution of the Futaba Fault on the Pacific coast, Fukushima prefecture, Northeastern Japan, estimated by microtremor observations               
    Tomoki Kaneko; Mamoru Koarai; Shigeki Senna
    The General Meeting of the Association of Japanese Geographers, Spring 2025, 19 Mar. 2025
    20250319, 20250321
  • 北埼玉地区の洪水特性と地形
    早乙女昴大; 小荒井衛
    国文学研究資料館・茨城大学GLEC 共同シンポジウム「歴史資料・古典籍を活用した減災・気候変動研究」, 07 Mar. 2025, [Invited]
    20250307, 20250307
  • 苗場山山頂湿原の湿原面積減少に関する植生分布の変化と地形との関係               
    手塚瀬恋; 小荒井衛
    日本山の科学会2024年秋季研究大会, 23 Nov. 2024
    20241123, 20241124
  • 常時微動計測で知る桜川低地と恋瀬川低地の地盤構造と災害リスク               
    小荒井衛
    第182回地理地殻活動研究センター談話会, 20 Sep. 2024, [Invited]
    20240920, 20240920
  • Exploring the landform evolution of the Sakuragawa lowlands in southern Ibaraki Prefecture by micro-tremors observation               
    Mamoru Koarai; Sota Yagai; Hayato Nakano; Shigeki Senna
    The 131st Annual Meeting of the Geological Society of Japan, 2024
    20240908, 20240911
  • 常時微動観測により明らかになった下妻市鬼怒地区の旧河道の地盤構造               
    赤澤光樹; 小荒井衛; 先名重樹
    第78回地学団体研究会総会(つくば), 17 Aug. 2024
    20240816, 20240819
  • Underground structure estimated from microwave observations at Futaba fault and Shionohira faults in Hamadori, Fukushima Prefecture               
    Tomoki Kaneko; Mamoru Koarai; Shigeki Senna
    The 78th Annual Meeting (Tsukuba) of the Association for the Geological Collaboration in Japan, 17 Aug. 2024
    20240816, 20240819
  • 筑波山地域ジオパークにおけるジオサイクリングツアー向けの地図作成               
    五十嵐明; 小荒井衛
    茨城地理学会 2024年度講演会, 03 Aug. 2024
    20240803, 20240803
  • 常時微動計測で明らかにした下妻市の鬼怒川旧河道の地下構造               
    赤澤光樹; 小荒井衛; 先名重樹
    茨城地理学会 2024年度講演会, 03 Aug. 2024
    20240803, 20240803
  • Formation of hummocks distributed at the southwestern foot of Bandai Volcano               
    Kouki Furusho; Mamoru Koarai
    Japan Geoscience Union Meeting 2024, 31 May 2024
    20240526, 20240531
  • Geotechnical hazard risk of the Sakuragawa Lowland estimated by micro tremor observation               
    Mamoru Koarai, Sota Yagai, Hayato Nakano, Shigeki Senna
    Japan Geoscience Union Meeting 2024, 27 May 2024
    20240526, 20240531
  • Seismic hazard risk of Miyanohara fault estimated by micro tremor observation
    Mamoru Koarai; Nobuyuki Nakajima; Shigeki Senna; Takashi Azuma; Kazuki Yoshida; Takayuki Nakano
    Japan Geoscience Union Meeting 2024, 26 May 2024
    20240526, 20240531
  • データソースと解像度の異なるDEMの地形解析上の特徴の違い               
    小荒井衛; 栗原夏希
    日本写真測量学会令和6年度年次学術講演会, 24 May 2024
    20240523, 20240524
  • Underground structure of depressions in Kodaira City, Tokyo, using micro tremor measurements               
    Mamoru KOARAI; Yuta KUWAMORI; Shigeki SENNA
    日本地理学会2024年春季学術大会, 19 Mar. 2024
    20240319, 20240321
  • 福島県いわき市の塩ノ平 断層,井戸沢断層,湯ノ岳断層におけ る滝の後退量から推定する過去の活動               
    金子朋紀; 小荒井衛
    日本地理学会2024年春季学術大会, 19 Mar. 2024
    20240319, 20240321
  • 磐梯山南西麓に分布する流れ山地 形の形成要因               
    古庄航輝; 小荒井衛
    日本地理学会2024年春季学術大会, 19 Mar. 2024
    20240319, 20240321
  • 古文書資料と地形情報から復元した 埼玉県行田市周辺地域の水害特性について
    小荒井衛; 米田夕夏
    人間文化研究機構国文学研究資料館 茨城大学地球・地域環境共創機構(GLEC)共同セミナー, 14 Mar. 2024, [Invited]
    20240314, 20240314
  • 航空レーザデータから森林構造を推定した斜面災害リスク評価
    小荒井衛; 村山いであ; 渡辺啓太
    CSIS DAYS 2023, 24 Nov. 2023
    20231124, 20231125
  • 航空レーザ測量データから取得した森林情報を活用した斜面災害リスクの検討
    小荒井衛; 村上亘; 桑原祐史; 村山いであ; 渡辺啓太
    日本地質学会 第130年学術大会, 18 Sep. 2023
    20230916, 20230918
  • 解像度とデータソースの違うDEMの 尾根谷密度の特徴について               
    小荒井衛
    176回 地理地殻活動研究センター談話会, 15 Sep. 2023, [Invited]
    20230915, 20230915
  • Deference of ground condition detected by micro tremor observation between Sakura-gawa Lowland and Koise-gawa Lowland, Ibaraki Pref.               
    Mamoru KOARAI; Hayato NAKANO; Naoki KAWAMURA; Souta YAGAI
    日本第四紀学会2023年大会, 01 Sep. 2023
    20230831, 20230904
  • Topographic features and flood damage characteristics of the Northeastern Saitama Prefecture ascertained from DEM analysis and archival research
    Mamoru KOARAI; Natsuki KURIHARA; Yuka YONEDA
    第77回地学団体研究会ちちぶ総会, 19 Aug. 2023
    20230819, 20230820
  • 常時微動観測により推定した長野県白馬村堀之内地区周辺における地盤特性と断層の関係
    中島展之; 小荒井 衛; 先名重樹
    第77回地学団体研究会ちちぶ総会, 19 Aug. 2023
    20230819, 20230820
  • 〔Major achievements〕航空レーザ測量から推定した森林構造情報の斜面災害リスク評価への活用可能性
    小荒井衛・村山いであ(茨城大学院理工学研究科; 現在:国土防災技術)・渡辺啓太(茨城大学院理工学研究科; 現在:パスコ)・村上亘(森林総合研究所)・桑原祐史(茨城大学工学野)
    日本写真測量学会令和5年度年次学術講演会, 18 May 2023, JSPRS
    20230516, 20230517
  • 〔Major achievements〕Landform evolution and source of the Otsukigawa debris avalanche deposits in the Otsukigawa basin on the Yatsugatake Volcano in Central Japan               
    Michito KOSHIBA (Graduate Student; Ibaraki Univ.) and Mamoru KOARAI
    The General Meeting of the AJG Spring 2023, 25 Mar. 2023, The Association of Japanese Geographers
    20230325, 20230327
  • 〔Major achievements〕Topographic analysis characteristics of DEM with different mesh sizes and data sources               
    Mamoru KOARAI; Natsuki KURIHARA (Ibaraki Univ.); Junko IWAHASHI (GSI) and Kazuki YOSHIDA (GSI)
    The General Meeting of the AJG Spring 2023, 25 Mar. 2023, The Association of Japanese Geographers
    20230325, 20230327
  • 〔Major achievements〕研究プロジェクト紹介
    小荒井衛
    国文学研究資料館・茨城大学地球・地域環境共創機構共同セミナー「歴史資料を活用した減災・気候変動適応に向けた文理融合研究の深化」, 22 Feb. 2023, 国文学研究資料館,茨城大学地球・地域環境共創機構, [Invited]
    20230222, 20230222
  • 〔Major achievements〕LiDARデータを用いた森林3次元構造の推定
    村山いであ(茨城大M2)・小荒井衛・渡辺啓太(茨城大M2)・栗花優衣(パスコ)・成清茜(ゼウス・エンタープライズ)
    CSIS DAYS 2022, 18 Nov. 2022, The University of Tokyo, Center of Spatial Information Science
    20221118, 20221119
  • 〔Major achievements〕航空レーザデータから水塚(みずか)の痕跡の抽出は可能か?               
    小荒井衛・元橋悠季(那珂川町立小川中学校)
    CSIS DAYS 2022, 18 Nov. 2022, The University of Tokyo, Center of Spatial Information Science
    20221118, 20221119
  • 〔Major achievements〕片貝断層群を中心とした新潟県小千谷地域の地形変動と地形発達               
    藤井奏冴(茨城大学大学院理工学研究科修士2年)・小荒井衛
    CSIS DAYS 2022, 18 Nov. 2022, The University of Tokyo, Center of Spatial Information Science
    20221118, 20221119
  • 〔Major achievements〕メッシュサイズとデータソースの異なるDEMにより解析した尾根谷密度と地質の関係についての検討               
    栗原夏希(茨城大学理学部4年)・小荒井衛
    CSIS DAYS 2022, 18 Nov. 2022, The University of Tokyo, Center of Spatial Information Science
    20221118, 20221119
  • 〔Major achievements〕常時微動計測結果からみる水戸及び霞ヶ浦周辺の谷底平野の地形発達的特徴と地盤災害特性               
    小荒井衛・川村直輝(茨城大理学部;現在:岩手県庁)・中島展之(茨城大院理工学研究科M1)・中野早登(茨城大理学部4年)・中埜貴元(国土地理院)・先名重樹(防災科研)
    日本地質学会第129年学術大会 東京・早稲田大会, 06 Sep. 2022, 日本地質学会
    20220904, 20220906
  • 〔Major achievements〕新潟県津南町~長野県飯山市における地震被害と地形・地盤特性の関係               
    中島展之・小荒井衛・高見慧一・橋上直生・福岡千夏・先名重樹・中埜貴元
    第76回地学団体研究会総会(長野), 20 Aug. 2022, 地学団体研究会
    20220820, 20220821
  • 〔Major achievements〕地形分類に基づく地震による地盤災害リスク評価の細分化の検討について-自然堤防と谷底平野の例-               
    小荒井衛
    国土地理院地理地殻活動研究センター談話会, 15 Jul. 2022, 国土地理院, [Invited]
    20220715, 20220715
  • 〔Major achievements〕Estimating 3D Forest Structure Using LiDAR Data For Risk Assessment Of Slope Collapse Considering Root System Development
    M. Koarai; I. Murayama; K. Watanabe; Y. Kurihana and A. Narikiyo
    ISPRS Congress 2022, 09 Jun. 2022, International Society for Photogrammetry and Remote Sensing
    20220606, 20220611
  • Geomorphological and petrological studies on the development of landform and source of the Otsukigawa debris avalanche deposits in,the Otsukigawa basin on the Yatsugatake Volcano in central Japan               
    小柴理人・小荒井 衛 (茨城大学大学院理工学研究科)
    JPGU2022, 01 Jun. 2022, JPGU
    20220529, 20220603
  • 苗場山頂湿原における植生変遷と地形との関係
    小荒井衛(茨城大院理工学研究科)・阿部聖(茨城大学理学部地球環境科学コース:現茨城県庁)
    JPGU2022, 22 May 2022, JPGU
    20220522, 20220527
  • 常時微動計測から推定した東茨城台地内の谷底平野の地形発達と地震時リスク               
    小荒井衛(茨城大院理工学研究科)・川村直輝(茨城大理学部;現在:岩手県庁)・中埜貴元(国土地理院)・先名重樹(防災科研)
    JPGU2022, 22 May 2022, JPGU
    20220522, 20220527
  • 常時微動観測により推定した宮野原断層周辺の地盤特性と2011年長野県北部地震の家屋被害との関係               
    中島展之(M1生)・小荒井衛・先名重樹(防災科研)・中埜 貴元(地理院)
    JPGU2022, 22 May 2022, JPGU
    20220522, 20220527
  • 航空レーザデータを用いた水塚の抽出手法の検討               
    小荒井衛 茨城大学理工学研究科教授・元橋 悠季(茨城大学理学部地球環境科学コース:現栃木県那珂川町立小川中学校)
    (一社)日本写真測量学会令和3年度年次学術講演会, 19 May 2022, (一社)日本写真測量学会
    20220519, 20220520
  • 歴史学的アプローチと理工学的アプローチを組み合わせた防災研究               
    小荒井衛(茨城大学大学院理工学研究科(理学野)教授)
    国文学研究資料館 創立50周年記念式典, 13 May 2022, 国文学研究資料館, [Invited]
    20220513, 20220513
  • 地図等から読み解く自然環境への人為の影響と災害リスクの変化               
    小荒井衛
    日本学術会議公開シンポジウム・第13回防災学術連携シンポジウム「自然災害を取り巻く環境はどう変化してきたか」, 09 May 2022, 日本学術会議・防災学術連携体, [Invited]
    20220509, 20220509
  • 研究プロジェクト紹介               
    小荒井衛
    国文学研究資料館・茨城大学GLEC共同セミナー『歴史資料を活用した減災・気候変動適応,に向けた新たな研究分野の創成』, 07 Mar. 2022, 国文学研究資料館・茨城大学GLEC, [Invited]
    20220307, 20220307
  • 茨城大学におけるフィールド教育               
    小荒井衛(茨城大学理学部教授)・小柴理人(修士1年)・橋本果歩(修士1年)
    第2回JABEEオンラインシンポジウム『昔と違う イマドキのフィールド教育』, 06 Mar. 2022, 日本地質学会, [Invited]
    20220306, 20220306
  • 地形を知る事は命を守る事               
    Mamoru KOARAI
    防災講演会, 26 Dec. 2021, [Invited]
    20211226, 20211226
  • 八溝山地中部の堆積岩地域における航空レーザ計測データによる森林の3次元要素の抽出               
    渡辺啓太(茨城大学M1生)・小荒井衛・村山いであ(茨城大学M1生)
    CSIS DAYS 2021, 19 Nov. 2021, CSIS
    20211119, 20211120
  • 熱海の土石流に関して(原因解明に関する空間情報計測技術の役割)               
    小荒井衛(茨城大学大学院理工学研究科(理学野))
    日本写真測量学会令和3年度秋季学術講演会, 21 Oct. 2021, (一社)日本写真測量学会
    20211021, 20211022
  • LiDARデータを活用した地形及び花崗岩風化と根系発達の関係               
    村山いであ(修士1年)・小荒井衛(茨城大学大学院理工学研究科(理学野))・渡辺啓太(修士1年)・栗花優衣(パスコ)・成清茜(ゼウス・エンタープライズ)
    日本写真測量学会令和3年度秋季学術講演会, 21 Oct. 2021, (一社)日本写真測量学会
    20211021, 20211022
  • 2021年7月3日(土)に発生した熱海市伊豆山地区の土石流について               
    小荒井衛
    R3年度地学団体研究会福島総会(オンライン)Web交流会(応用地質研究会 話題提供), 21 Aug. 2021, 地学団体研究会, [Invited]
    20210821, 20210822
  • 茨城県常総市三坂新田・沖新田地区の村落成立に関する地図と地盤条件からの検討               
    小荒井衛(茨城大院理工学研究科(理学野))・三木香奈穂(茨城大学理学部卒業生)・高見慧一(茨城大院理工学研究科:現(株)パスコ)・先名重樹(防災科学技術研究所)
    「日本地図学会 2021 年度定期大会」・「茨城地理学会」, 20 Aug. 2021, 日本地図学会・茨城地理学会
    20210820, 20210821
  • 常時微動計測を用いた鬼怒川・小貝川低地の堆積環境の推定               
    小荒井衛(茨城大院理工学研究科)・三木香奈穂(茨城大学理学部卒業生)・高見慧一(茨城大院理工学研究科:現(株)パスコ)・先名重樹(防災科学技術研究所)
    JPGU2021, 05 Jun. 2021, JPGU
    20210530, 20210606
  • 長野県飯山市における工学的基盤深度と活構造・地震被害との関連性               
    小荒井衛(茨城大院理工学研究科)・高見慧一(茨城大院理工学研究科;現在:(株)パスコ)・橋上直生(茨城大理学部;現在:岩手県庁)・中埜貴元(国土地理院)・先名重樹(防災科研)
    日本地球惑星科学連合2021年大会, 04 Jun. 2021, 日本地球惑星科学連合
    20210530, 20210606
  • 樹木の根系発達を考慮した斜面崩壊リスク評価のための航空レーザによる森林構造の推定               
    小荒井衛(茨城大学大学院 理工学研究科 地球環境科学領域)・村山いであ・渡辺啓太(茨城大学大学院 理工学研究科)・栗花優衣(現在 (株)パスコ)・成清茜(現在 (株)ゼウスエンタープライズ)
    (社)日本リモートセンシング学会第70回学術講演会, 18 May 2021, (社)日本リモートセンシング学会
    20210517, 20210518
  • 令和元年台風 19 号による堤防決壊・浸水氾濫過程の調査               
    小荒井衛
    台風19号災害茨城大学調査団最終報告会, 05 Feb. 2021, 茨城大学, [Invited]
    20210205
  • 長野県栄村および長野市松代地区における地盤震動特性と地震被害との関係               
    高見慧一(M2生)・小荒井衛・先名重樹(防災科研)・福士沙織(朝日航洋(修士修了生))
    日本第四紀学会2020年大会, 26 Dec. 2020, 日本第四紀学会
    20201226, 20201227
  • ジオサイト地図における地形表現の効果について               
    小荒井衛・武田直樹(茨城大学ジオパーク推進室)ほか学生13名
    JPGU2020, 16 Jul. 2020, JPGU
    20200712, 20200716
  • 1847年善光寺地震における長野市松代町の建物被害と地形・地盤との関係               
    福士沙織(朝日航洋(修士修了生))・小荒井衛・高見慧一(M1生)・先名重樹(防災科研)
    JPGU2020, 16 Jul. 2020, JPGU
    20200712, 20200716
  • 茨城県内における谷底平野の勾配の特徴               
    小荒井衛・關根友哉(卒業生)・中埜貴元(国土地理院)
    JPGU2020, 14 Jul. 2020, JPGU
    20200712, 20200716
  • 詳細なDEMデータを活用した新潟県信濃川流域に広がる段丘面の地形解析               
    小関敏史(M2生)・小荒井衛
    JPGU2020, Jul. 2020, JPGU
    20200712, 20200716
  • 新潟県長岡市武道窪地区における地形発達過程の解明               
    笹森幸祐(都立大M1生(卒業生))・小荒井衛
    JPGU2020, Jul. 2020, JPGU
    20200712, 20200716
  • 台風19号災害による那珂川・久慈川水系の被害               
    小荒井衛・茨城大学令和元年度台風19号災害調査団被災過程解明グループ
    第11回GIS Landslide 研究集会, 21 Apr. 2020, GIS Landslide 研究会
    20200421
  • 古文書や古地図を使った文理融合の地震災害研究ー1847年善光寺地震の松代での事例ー               
    小荒井衛・福士沙織(M2生)
    国文学研究資料館・茨城大学ICAS共同シンポジウム 歴史資料を活用した減災・気候変動適応に向けた新たな研究分野の創成, 13 Feb. 2020, 国文学研究資料館・茨城大学ICAS, [Invited]
    20200213, 20200213
  • 台風19号による茨城県内における那珂川水系・久慈川水系の被害について               
    小荒井衛
    日本地理学会台風19号緊急報告会, 22 Dec. 2019, 日本地理学会, [Invited]
    20191222
  • 被災過程解明Gのこれまでの取り組みと今後の予定               
    小荒井衛
    台風19号災害茨城大学調査団速報報告会, 11 Dec. 2019, 茨城大学, [Invited]
    20191211
  • Estimation of three dimensional structure of forest and development of roots of trees using LiDAR data               
    Mamoru Koarai / Akane Narikiyo / Wataru Murakami (Forest Research Institute)
    International Cartography Conference 2019, 19 Jul. 2019, ICA
    20190715, 20190720
  • Consideration of topographic expression for Geopark maps -Case study of the North Ibaraki Geopark               
    Mamoru Koarai / Rika Imaizumi (Aero Asahi)
    International Cartography Conference 2019, 17 Jul. 2019, ICA
    20190715, 20190720
  • 航空レーザデータを用いた森林の三次元構造と根系発達の推定               
    小荒井衛・成清茜(ゼウス・エンタープライズ(卒業生))・村上亘(森林総研)・桑原祐史(茨城大学広域水圏センター)
    2019年度日本地図学会定期大会, 16 Jul. 2019, 日本地図学会
    20190716, 20190717
  • 自然堤防の比高による液状化危険度の違いについて               
    小荒井衛・内山滉太(基礎地盤(卒業生))・中埜貴元(国土地理院)
    JPGU2019, 30 May 2019, (一社)日本地球惑星科学連合
    20190527, 20190531
  • 阿武隈山地における航空レーザデータを用いた森林三次元構造の把握について               
    成清茜(ゼウス・エンタープライズ(卒業生))・〇小荒井衛・村上亘(森林総研)・小川泰浩(森林総研)
    JPGU2019, 30 May 2019, (一社)日本地球惑星科学連合
    20190526, 20190530
  • ジオパークのガイドマップにおける多重光源陰影段彩図の有効性ー茨城県北ジオパーク構想を例にー               
    鈴木敬子(東京地図研究社)・石川剛(同左)・小荒井衛・今泉利架(朝日航洋(卒業生))・武田直樹(茨城大学ジオパーク推進室)
    JPGU2019, 30 May 2019, JPGU
    20190526, 20190530
  • 新潟県信濃川・魚野川合流域周辺における段丘区分および地形発達過程について               
    小関敏史(M1生)・小荒井衛
    JPGU2019, 26 May 2019, JPGU
    20190526, 20190530
  • ジオサイトにおける地形表現の活用 〜茨城県北ジオパーク構想での事例〜               
    石川剛(東京地図研究社)・鈴木敬子(同左)・小荒井衛・今泉利架(朝日航洋(卒業生))・武田直樹(茨城大学ジオパーク推進室)
    JPGU2019, 26 May 2019, JPGU
    20190526, 20190530
  • 斜面崩壊予測のための航空レーザによる森林構造の把握について               
    成清茜(ゼウス・エンタープライズ(卒業生))・〇小荒井衛・村上亘(森林総研)・小川泰浩(森林総研)
    日本写真測量学会令和元年年次学術講演会, 24 May 2019, (一社)日本写真測量学会
    20190524, 20190525
  • 国文学研究資料館との共同研究とは               
    小荒井衛
    国文学研究資料館・茨城大学ICAS共同シンポジウム 水害対応の過去-現在-未来, 15 Feb. 2019, 国文学研究資料館・茨城大学ICAS, [Invited]
    20190215, 20190215
  • ジオパーク地図における地形表現方法の検討-茨城県北ジオパークを対象にして-               
    今泉利架(4年生)・小荒井衛
    JPGU2018, 24 May 2018, JPGU
    20180520, 20180524
  • 2014年長野県北部の地震による白馬村堀ノ内地区の建物被害と地形・表層地質との関係               
    冨田美有(卒業生)・小荒井衛
    JPGU2018, 21 May 2018, JPGU
    20180520, 20180524
  • 自然堤防における液状化発生箇所の地形・地盤条件               
    小荒井衛・星野春奈(卒業生)・横須賀一茂(卒業生)
    JPGU2018, 20 May 2018, JPGU
    20180520, 20180524
  • 茨城大学学生による地質情報を活用した茨城県における地域振興               
    渡部将太・大友眞太郎・小関敏史・柴田翔平・菅原慎吾・古屋海砂(以上学生)・小荒井衛
    JPGU2018, 20 May 2018, JPGU
    20180520, 20180524
  • 東北地方太平洋沖地震による津波災害区分と地形との関連についての砂浜海岸とリアス式海岸との比較               
    小荒井衛・菅原一希(地盤調査事務所(卒業生))
    CSIS DAYS 2017, 30 Nov. 2017, CSIS
    20171130, 20171201
  • 航空機SARの多偏波後方散乱強度を用いた津波被害区分の検討               
    小荒井衛・中埜貴元(国土地理院)
    CSIS DAYS 2016, 17 Nov. 2016, CSIS
    20161117, 20161218
  • 鬼怒川水害の地理空間情報解析               
    小荒井衛(茨城大)・中埜貴元(国土地理院)・村上哲(福岡大)・安原一哉(茨城大ICAS)
    CSIS DAYS 2016, 17 Nov. 2016, CSIS
    20161117, 20161218

Courses

  • Apr. 2025 - Present
    茨城キリスト教大学
  • Sep. 2022 - Present
    茨城大学
  • Apr. 2020 - Present
    茨城大学
  • Sep. 2016 - Present
    茨城大学大学院博士前期課程
  • Sep. 2015 - Present
    茨城大学大学院博士前期課程
  • Apr. 2015 - Present
    茨城大学
  • Sep. 2014 - Present
    茨城大学
  • Sep. 2014 - Present
    茨城大学
  • Apr. 2015 - Jul. 2024
    茨城大学
  • 茨城大学
  • 茨城大学
  • 茨城大学
  • 茨城大学
  • 茨城大学
  • 茨城大学
  • 茨城大学

Affiliated academic society

  • 2015 - Present, 茨城地理学会
  • 2005 - Present, JPGU
  • 1999 - Present, 地理情報システム学会
  • 1999 - Present, 日本写真測量学会
  • 1999 - Present, 日本リモートセンシング学会
  • 1990 - Present, 日本地理学会
  • 1990 - Present, 日本沿岸域学会
  • 1988 - Present, 日本地質学会
  • 1988 - Present, 日本地図学会
  • 1988 - Present, 東京地学協会
  • 1988 - Present, 日本火山学会
  • 1987 - Present, 日本第四紀学会
  • 1984 - Present, 地学団体研究会
  • 東北地理学会
  • 社会地質学会

Research Themes

Media Coverage

  • 〔Major achievements〕茨城県北ジオブックの刊行           
    茨城新聞社, 茨城新聞, Oct. 2023, Paper
  • 〔Major achievements〕地図アプリで災害は予測できる!?学者に聞いた「水害大国日本」の土地の歴史           
    マイネ王, May 2021, Internet
  • 〔Major achievements〕いわきの活断層調査の同行取材           
    NHK水戸支局, NHKいば6, Mar. 2021, Media report

Academic Contribution Activities

  • 地学団体研究会 会長               
    Planning etc
    Aug. 2020 - Present
  • 東京地学協会 渉外委員               
    Planning etc
    Apr. 2020 - Present
  • 日本地質学会 技術者教育委員               
    Planning etc
    Jul. 2019 - Present
  • 防災学術連携体連携会員(日本第四紀学会)               
    Academic research planning
    Jul. 2017 - Present
  • 日本リモートセンシング学会 評議員               
    Planning etc
    May 2017 - Present
  • 日本リモートセンシング学会 国土防災委員会委員               
    Academic research planning
    Apr. 2017 - Present
  • 日本地図学会 防災委員会委員               
    Academic research planning
    Apr. 2017 - Present
  • 日本リモートセンシング学会 防災委員会委員               
    Academic research planning
    Apr. 2017 - Present
  • 日本第四紀学会 評議員               
    Planning etc
    Aug. 2010 - Present
  • 日本地図学会 評議員               
    Planning etc
    Aug. 2005 - Present
  • 日本地理学会 災害対応委員               
    Planning etc
    Jul. 2005 - Present

Others

  • 科研費申請書作成のポイント
    Sep. 2019