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Studies for subaqueous and submerged landslides and their relation to tsunamis in caldera areas

破火山口地区水下和水下滑坡及其与海啸关系的研究

基本信息

批准号：
23710206
负责人：
YAMASAKI Shintaro
金额：
$ 2.91万
依托单位：
Kitami Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2013
项目状态：
已结题

项目摘要

Subaqueous landslides and submerged landslides in caldera areas and their outer rims were investigated to know geologic structures and topographies for them. The important results are following three: First, many sublake landslides in Caldera lake Kussharo, east part of Hokkaido were found, and the high possibility that a landslide related to the tsunami disaster of the 1923 Kussharo earthquake was showed by topographic and bottom material analyses and its combined numerical simulation. Second, an example of collapsed outer rims submerging to the sea, the Nebukawa landslide which induced by the 1923 Kanto great earthquake was investigated, and the affected area of landslide and the shape of landslide body that has been scarcely reported was clarified. Third, the newly acoustic investigating method was developed through these above investigations. This method consists of leisure-use fish finders and side-scan sonar, and it can be introduced in narrow and shallow water.

对破火山口地区及其外缘的水下滑坡和淹没滑坡进行了调查，以了解其地质结构和地形。重要成果有以下三点：第一，在北海道东部的库沙罗火山口湖发现了多处湖下滑坡，通过地形和底部物质分析及其组合的数值模拟，表明滑坡与1923年库沙罗地震海啸灾害有关的可能性很大。其次，以1923年关东大地震诱发的根川滑坡为例，考察了崩塌外缘沉入海中的情况，明确了滑坡的影响范围和滑坡体的形态。第三，通过以上研究，发展了新的声学探测方法。该方法由休闲用探鱼仪和侧扫声纳组成，可以在狭窄和浅水中引入。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

レジャー用魚群探知機を利用した水底地形調査

使用休闲鱼探仪进行水下地形测量

DOI：
发表时间：
2013
期刊：
応用地質
影响因子：
0
作者：
Tatsuo Kanamaru;Kuniyuki Furukawa;金丸龍夫,古川邦之;Tatsuo Kanamaru and Kuniyuki Furukawa;金丸龍夫・古川邦之;金丸龍夫・高橋正樹;西山昭仁;山崎新太郎・原口強・伊藤陽司
通讯作者：
山崎新太郎・原口強・伊藤陽司

Underwater topographic survey for inaccessible water areas, and its applications to submarine and sublake landslides