Formation and failure of the Tsatichhu landslide dam, Bhutan
Formation and failure of the Tsatichhu landslide dam, Bhutan
复制标题
DOI：
10.1007/s10346-005-0032-x
复制
发表时间：
2006-01
期刊：
影响因子：
6.7
通讯作者：
S. Dunning;Nick J. Rosser;D. Petley;C. Massey
中科院分区：
文献类型：
--
作者：
S. Dunning;Nick J. Rosser;D. Petley;C. Massey
2003年9月10日00时30分（当地时间），一个由节理和叶理构成的楔形物质（估计体积为7-12× 106 m3）滑入不丹东部伦策省Jarrey Geog的狭窄Tsatchhu河谷。Tsatchhu河是Kurichuu河向东北流动的支流，被山体滑坡完全阻断。在其移动过程中，山体滑坡转变为岩石雪崩，在与对面的谷壁碰撞之前，在山谷中行进了580米。然后，水流沿着山谷向下移动，总距离约为700米。岩石雪崩伴随着强烈的狂风，对森林茂密的山谷斜坡造成了重大破坏。由此产生的地貌典型的岩石崩落坝存款创建了一个大坝，蓄水量为4-7× 106 m3在湖满水位。这个湖是由灾难性的滑坡，这发生在16：20（当地时间）2004年7月10日，在报告较小的失败饱和下游面崩溃释放。溃坝引发的洪水波在下游35公里处的库里丘水电站（Kurichhu Hydropower Plant）产生了5900 m3 s − 1的峰值流量。
At 00:30 (local time) on the 10th September 2003 a joint and foliation defined wedge of material with an estimated volume of 7–12×106m3slid into the narrow Tsatichhu River Valley, in Jarrey Geog, Lhuentse, eastern Bhutan. The Tsatichhu River, a north–easterly flowing tributary of the Kurichuu River, was completely blocked by the landslide. During its movement, the landslide transitioned into a rock avalanche that travelled 580 m across the valley before colliding with the opposite valley wall. The flow then moved down valley, travelling a total distance of some 700 m. The rock avalanche was accompanied by an intense wind blast that caused substantial damage to the heavily forested valley slopes. The resulting geomorphologically-typical rock-avalanche dam deposit created a dam that impounded a water volume of 4–7×106m3at lake full level. This lake was released by catastrophic collapse of the landslide, which occurred at 16:20 (local time) on 10th July 2004, after reported smaller failures of the saturated downstream face. The dam failure released a flood wave that had a peak discharge of 5900 m3s−1at the Kurichhu Hydropower Plant 35 km downstream.