云南山区水库溃坝洪水及其演进分析

受地形影响,西南山区水源以水库为主,由于大部分水库修建时间较早,在西南季风气候降水集中影响下,存在较大的溃坝风险。溃坝洪水突发性与破坏性极强,进行水库溃坝洪水计算及洪水演进分析,是在水库大坝发生突发性安全事故时科学应对的基础。结合西南山区实际,优选溃坝洪水计算与洪水演进模型,并以云南省昌宁县河西水库为例,分析确定相关参数,分析指出了西南山区水库溃坝形态以全溃为主,具有溃坝洪水量极大、洪水演进迅速的特点。研究不仅可为河西水库制定大坝安全管理应急预案提供技术支撑,也能为该地区水库溃坝洪水及其演进分析提供参考借鉴。

Analysis of Dam-break Flood Transfer in Yunnan Mountainous Area

Affected by the terrain, reservoirs are taken as the main water sources in the Yunnan mountainous area. Because the most reservoirs were built many years ago, there is a greater risk of dam break under the influence of under the influence of precipitation concentrated in the monsoon climate. Therefore, it is important to make dam-break flood routing. In this paper, a dam-break flood routing model was used for the actual conditions of the Yuannan mountainous area and the Hexi Reservoir in Changning County was taken as a study case to determine the relevant parameters. The results show that if dam break occurs, reservoir will collapse fully, with a great amount of flood flow and rapid transfer.