Change of topography and prediction of sediment disaster after the Chi-chi earthquake in Taiwan

台湾集集地震后地形变化及泥沙灾害预测

• 批准号: 17405033
• 负责人: SHIMOKAWA Etsuro
• 金额: $ 5.91万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17405033/
• 关键词: Taiwan; 1999 Chi-Chi Taiwan Earthquake; Change of topograph; Hydrologic observation; Slope failure; Debris flow; Disaster prevention; International joint research; 国際研究者交流

The Chi-Chi Taiwan Earthquake on September 21, 1999 killed many people and involved great property loss. Also, it triggered many slope failures and debris flows in the mountainous regions. The resulting sediment movement caused sediment disasters at every heavy rain. This study aimed to examine the prediction of sediment disaster and the change of topography following the earthquake based on the field investigations. The results are summarized as follows :1. Changes of topography of slopes and river channels following the earthquake ware clarified quantitatively in the study area (10.76km^2)in central Taiwan. More than 131 slope-failure scars have been identified through aerial photographic interpretation. The slope-failure area is 1.35km^2, representing 12.5% of the study area. The sediment from slope failures flows out to the lower reaches of the river at every heavy rain. The outflow of the sediment changes the river topography at the same time as it causes sediment disasters.2.19 courses of traverse were installed in altitude 800m-1100m, and change of the topography was surveyed every year in the main river channel of the study area. The long-term topography changes following the earthquake were quantitatively clarified based on the survey results.3. Although debris flows had occurred about once per year in the study area before the earthquake, they occurred 20 times or more after the earthquake. Older and more recent debris-flow terraces are observed along the river in the study area. In Taiwan, severe earthquakes have occurred repeatedly in the past, and sediment movement resulting from earthquakes is considered to be the main cause of change in mountain and river topography.4. In order to research the characteristics of debris flows after the earthquake, debris flow was observed using the video camera. The big debris flow was observed also in 2007.

1999年9月21日，台湾奇奇台湾地震造成了许多人，并造成了巨大的财产损失。此外，它触发了许多山坡的斜坡故障和碎屑流动。由此产生的沉积物运动在每一场大雨中都会造成沉积物灾难。这项研究旨在根据现场调查研究地震后沉积物灾难的预测和地形变化。结果总结如下：1。台湾中部的研究区域（10.76 km^2）在数量上阐明了地震塑形的地形变化。通过航空摄影解释已经确定了131多个斜率疤痕。坡度出现区域为1.35 km^2，占研究区域的12.5％。在每次大雨中，坡度故障的沉积物流向河的下部。沉积物的流出改变了河流的地形，同时造成沉积物灾难。2.19Traverse赛程安装在800m-1100m的高度，每年在研究区的主要河流通道中调查了地形的变化。根据调查结果对地震后的长期地形变化进行了定量阐明。3。尽管地震发生前的研究区域每年大约发生了一次碎屑流，但地震后发生了20次或更多。在研究区域的河流沿线观察到较旧的杂物流露台。在台湾，过去曾多次发生严重的地震，地震引起的沉积物运动被认为是山和河流地形变化的主要原因。4。为了研究地震后碎屑流的特征，使用摄像机观察到碎屑流。在2007年也观察到了大碎片流。

项目成果

九州火山地域における土砂災害とその対策(Sediment Disasters and Theme Countermeasures in Volcanic Area of Kyushu,Japan)

日本九州火山区泥沙灾害及主题对策

• 发表时间: 2005
• 期刊: Proc.2005 International Conference on Himslope Stabilization and Environmental Restoration
• 作者: TERAMOTO;Y;地頭薗隆;地頭薗隆;地頭薗隆;TERAMOTO Yukiyoshi;TERAMOTO Yukiyoshi;TERAMOTO Yukiyoshi;下川 悦郎;地頭 薗隆
• 通讯作者: 地頭 薗隆

Damage caused by typhoon Nabi to slopes bordering forest roads in the Takakuma Experimental Forest, Kagoshima University, in September 2005

2005 年 9 月，台风“彩蝶”对鹿儿岛大学高熊实验林森林道路边缘的斜坡造成破坏

• 发表时间: 2006
• 期刊: Res. Bull. Kagoshima Univ. For. 34
• 作者: TERAMOTO;Y
• 通讯作者: Y

Sediment Disasters and Their Countermeasures in Volcanic Area of Kyushu, Japan

日本九州火山区泥沙灾害及其对策

• 发表时间: 2005
• 期刊: Proc. 2005 International Conference on Hillslope Stabilization and Environmental Restoration
• 作者: JITOUSONO;T
• 通讯作者: T

日本における土砂災害研究と対策の動向(The Research and Strategy of Mass-movement and Sediment-relate Disaster in Japan)

日本大规模移动泥沙灾害研究与对策

• 发表时间: 2005
• 期刊: Proc.2005 International Conference on Hilislope Stabilization and Environmental Restoration
• 作者: TERAMOTO;Y;地頭薗隆;下川悦郎
• 通讯作者: 下川悦郎

特集:「降雨の流出過程と土砂生産」-5深層崩壊

专题：《降雨径流过程及泥沙产生》-5 深层滑坡

• 发表时间: 2005
• 期刊: 砂防学会誌(新砂防) 53(3)
• 作者: TERAMOTO;Y;地頭薗隆;地頭薗隆;地頭薗隆;TERAMOTO Yukiyoshi;TERAMOTO Yukiyoshi;TERAMOTO Yukiyoshi;下川 悦郎;地頭 薗隆;久保田 哲也;下川 悦郎;地頭 菌隆;地頭 曹隆
• 通讯作者: 地頭 曹隆