2001 Fiscal Year Final Research Report Summary
Development of a Nationwide GIS-Based Engineering Geomorphologic Classification Map
| Project/Area Number |
12558044
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Natural disaster science
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| Research Institution | Association for Earthquake Disaster Prevention |
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Principal Investigator |
WAKAMATSU Kazue Association for Earthquake Disaster Preventiion, Research Fellow, 研究員 (10132789)
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| Co-Investigator(Kenkyū-buntansha) |
SUGIURA Masam Asia Air Survey Co., Dept. Disaster Prevention Consultancy, Manager, 防災部都市防災課, 課長
KUBO Sumiko Waseda University, School of Education, Associate Professor, 教育部, 助教授 (90275967)
MATSUOKA Masashi National Research Institute for Earth Science and Disaster Prevention, Earthquake Disaster Mitigation Research Center, Research Engineer, 地震防災フロンティア研究センター, 研究員 (80242311)
HASEGAWA Kouichi National Research Institute for Earth Science and Disaster Prevention, Earthquake Disaster Mitigation Research Center, Research Engineer, 地震防災フロンティア研究センター, 研究員 (20360381)
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| Project Period (FY) |
2000 – 2001
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| Keywords | GIS / Geomorphologic land classification / Geologic classification / The Digital National Land Information / Sediment yield / Digital map |
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| Research Abstract |
The present study aims to create a nationwide GIS-based digital map with a 1 X 1 km^2 size pixels for geomorphologic and geotechnical conditions, which can be applicable for compiling various kinds of hazard maps, damage assessments and emergency response for natural disasters, and analysis of damage data and strong motion data. To create the map, land classification mapping system is developed using the topological, geomorphologic and geologic information included in the Digital National Land Information and existing analog maps.
A 1 x 1 km cell is constrained to assign to a single geomorphologic unit that occupied the greatest area of the cell in case of multi-units being actually exist within the cell. Nevertheless, the precision of the digital mapping would be remarkably improved by geomorphologic classification being performed with large scale. Hence, our geomorphologic classification study has been carried out, in principle, at a scale of 1:50,000. This indicates higher-precision
… More
classification mapping than available with the land classification databases in the DNLI at a scale of 1:200,000. A prototype of the engineering geomorphologic map was created for approximately 400,000 grid cells of entire Japan.
As geology and a slope-steepness parameter and geology are an important factor in the evaluation of landslide and slope-failure potential in mountainous region, a practical criteria of land classification for mountainous regions based on combination of and geologic time and average gradient of ground surface were developed for mountainous regions. The average gradient of ground surface for each cell was calculated using the Digital Elevation Model. To verify validity of the criteria, relationships between sediment yield and our classification were investigated for main drainage basins in Shizuoka Prefecture. As the results a combine use of average gradient of ground surface and geologic time was found to obtain good correlations than an individual use of relative relief or geology that were used in previous mappings. Less
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[Publications] Wakamatsu, K., Matsuoka, M., Kubo, S., Sugiura, M., Hasegawa, K.: "Development of a Nationwide GIS-Based Ground-Condition Map for Disaster-Mitigation Systems"Proc., U.S.-Japan Cooperative Research on Urban Earthquake Disaster Mitigation, Seattle, Washington. 146-151 (2001)
Description
「研究成果報告書概要(和文)」より
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