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摘要
Tangjiashan Barrier Lake is one of the largest barrier lakes caused by the Wenchuan Earthquake. Its risk analysis, emergency plan and effect of the emergency plan are introduced in this paper. The dam height of Tangjiashan Barrier Dam is about 105 m, and the reservoir storage capacity is 3.2x10(8) m(3). When the dam broke the flood peak were estimated to be larger than 48000 m(3)/s, which might cause a enormous disaster to the downstream cities and residents. A discharge channel with 13 m deep and 8 m wide was drug, so that the water may flow out of the lake before the dam breaks. As a result, the drainage and risk mitigation project are successful. During the drainage process, the flood peak was about 6500 m(3)/s, and about 1.6x10(8) m(3) of water was drained off and the residual reservoir capacity was only 8.97x10(7) m(3). A new channel with average width 100 m was formed, which can bear floods of 200 years frequency. The successful experience and the collected data can be used to deal with the similar natural disasters in future.
- 出版日期2009-4
- 单位中国水利水电科学研究院
