Utilization of Japan Engineering Geomorphologic Classification Map for Nationwide Hazard Assessments

利用日本工程地貌分类图进行全国灾害评估

基本信息

批准号：
15510155
负责人：
WAKAMATSU Kazue
金额：
$ 2.43万
依托单位：
The Association for Earthquake Disaster Prevention
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510155/
关键词：
Geographic Information System (GIS)Geomorphologic land classification Site amplification factors Average shear-wave velocity in the upper 30m Reservoir sedimentation Flood hazard potential Surface geology Slope GIS 地盤地震動増幅特性ダム堆砂量

项目摘要

The authors have developed a Japan Engineering Geomorphologic Classification Map (JEGM) for nationwide hazard assessments, covering the all of Japan with Japanese standard size grid which is 30 arc-seconds in latitude x 45 arc-seconds in longitude (approximately 1 x 1 km). The map is the first nationally standardized GIS database for ground conditions in Japan, which includes four sets of major attributes : geomorphologic classification, geologic age, slope angle, and relative relief in approximately 380,000 grid cells, respectively. In this study, the JEGM was used to perform hazard zonings for all of Japan, a 378,000-km^2. Hazards include : (1)site amplification, (2)soil liquefaction in low lying areas, (3)reservoir sedimentation in mountainous areas, and (4)flood hazard. Hazard potentials were computed using attributes of geomorphologic classification, geologic age, elevation, slope angle contained in JEGM for site-amplification potential ; attributes of geomorphologic classification and slope angle for liquefaction potential ; attributes of slope angle and geologic age for reservoir sedimentation potential and attributes of geomorphologic classification for flood hazard potential. The map is useful for evaluating the approximate affected areas and for disaster prevention planning such as arrangement of evacuation sites, although the estimation is not in exact detail.

作者开发了用于全国灾害评估的日本工程地貌分类图 (JEGM)，覆盖日本全境，采用日本标准尺寸网格，纬度 30 角秒 x 经度 45 角秒（约 1 x 1 公里）。该地图是日本第一个国家标准化地面状况 GIS 数据库，其中包括四组主要属性：地貌分类、地质年龄、坡度和相对地形，分别约 380,000 个网格单元。在本研究中，JEGM 用于对整个日本（378,000 平方公里^2）进行危险分区。危害包括：（1）场地扩大、（2）低洼地区土壤液化、（3）山区水库淤积、（4）洪水灾害。使用 JEGM 中包含的地貌分类、地质年龄、海拔、坡角属性计算危险潜力，以进行场地放大潜力；地貌分类属性和液化潜力的坡角；水库沉积潜力的坡角和地质年龄属性以及洪水灾害潜力的地貌分类属性。该地图对于评估大概的受影响区域以及避难场所的安排等防灾规划很有用，尽管估算并不准确。