Study on Formation of Huge Waves due to Landslide in a Reservoir

水库滑坡形成巨浪的研究

• 批准号: 10480095
• 负责人: MICHIUE Masanori
• 金额: $ 1.09万
• 依托单位: TOTTORI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10480095/
• 关键词: Landslide; Tsunami disaster; Mt.Mayuyama; Numerical simulation of Landslide; Numerical simulation of waves; 運動特性

Almost 200 years ago, in 1792, a big landslide occurred at Mayuyama in Shimabara peninsula, Kyusyu island, Japan About 1.5 hundred millions of sediments slid and flowed into the Ariake Bay. In this case, the huge waves like Tsunami were generated by the landslide and the wave height became more than 20m and 14,500 people were killed in coastal area. This disaster is one at the most huge disaster in Japan. In this project, a two-dimensional numerical simulation model for Tsunami based on two-dimensional landslide model has developed and is applied to Mayuyama disaster. In the simulation of landslide, A result of calculation is closed agree with time actual final shape of the landslide after the termination, the length and the height in the area of Ariake bay. In this case, the phermomena of landslide might finish in about 100sec after the collapse was triggered, and the velocity and the thickness are almost 100m/sec and 30m respectively. And In wave simulation, according to comparison with simulation results and the observed one, it is found how well the calculation method introduced here recreates the change in water level which is accompanied the landslide.

大约200年前的1792年，日本九州岛岛原半岛的Mayuyama发生了一次大滑坡，大约1.5亿沉积物滑入有明湾。在这种情况下，滑坡产生了海啸般的巨浪，浪高超过20米，沿海地区有14，500人死亡。这场灾难是日本最大的灾难之一。本研究以二维滑坡模型为基础，发展了海啸二维数值模拟模型，并将其应用于Mayuyama灾害。在滑坡模拟中，计算结果与有明湾地区滑坡终止后的实际最终形态、长度和高度都比较接近。在这种情况下，滑坡的先兆可能在崩塌触发后约100秒内结束，其速度和厚度分别约为100米/秒和30米。在波浪模拟中，通过与实测结果的比较，发现本文所介绍的计算方法能较好地再现滑坡引起的水位变化。

项目成果

Fukuzumi et. al.: "Study on 2-d Numerical Simulation Method for Mass Movement of andslide Body"Proc. of 52^<th> Conf., Tyugoku Bran.. 111-112 (2000)

福住等。

Masayoshi SHIMIZU: "Reinforcement's effects in the tank-model prediction of slope failure due to rainfalls"Proc.of International Symposium on Slope Stability Engineering-IS-SHIKOKU'99/Matsuyama/Shikoku/Japan. 453-458 (1999)

Masayoshi SHIMIZU：“加固对降雨引起的边坡破坏的坦克模型预测的影响”Proc.of 国际边坡稳定性工程研讨会-IS-SHIKOKU99/松山/四国/日本。

Kajikawa et. al.: "Study on Numerica Simulation method for Formation of Tsunami due to Movement of Landslide Body"Proc. of 52^<th> Conf., Tyugoku Bran.. 113-114 (2000)

梶川等。

Shimizu :: "Reinforcement's effects in the tank-model prediction of slope failure due to rainfalls"Proc. of Int.Sym.on Slope Stability Engineering-IS-SHIKOKU' 99/Matsuyama/Shikoku/Japan. 453-458 (1999)

Shimizu ::“加固对降雨引起的边坡破坏的坦克模型预测的影响”Proc。

道上正規,宮本邦明 他: "崩壊土塊の運動と2次元数値解析手法の研究"土木学会中国支部研究発表会発表概要集. 第52回. 111-112 (2000)

道上正则、宫本国明等：“塌陷土体运动及二维数值分析方法研究”日本土木工程学会中国分会研究报告摘要集（2000年）111-112。 ）