基于FLO-2D的抽水蓄能电站泥石流模拟分析

Simulation analysis on debris flow in pumped storage power station based on FLO-2D

针对新疆吐鲁番盆地东侧鄯善县泥石流灾害影响该地区工程建设与发展的问题,以新疆鄯善县抽水蓄能电站下库区泥石流为研究对象,运用FLO-2D数值模拟软件,对不同降雨频率下(P=1%,2%,5%)泥石流沟的发生过程进行模拟。结果表明:在降雨频率P=1%和P=2%的降水条件下,沟内泥石流将冲出淤积在拦沙坝附近,并侵占河道。以库区运行年限100 a计,库区淤积总量为21567 m^(3),对下库区库容产生一定的影响。

In view of the debris flow disasters in Shanshan County,east of Turpan Basin,Xinjiang,which seriously affected the engineering construction and development in this area,we selected the debris flow in the lower reservoir area of the pumped storage power station in Shanshan County,Xinjiang as the research object.FLO-2D simulation software was used to simulate the occurrence process of debris flow in the ditch under different rainfall frequency(P=1%,2%,5%).The results showed that under the precipitation conditions of P=1%and P=2%,the debris flow in the ditch would wash out and deposit near the sand barrier and occupy the river channel.Based on the operating period of 100 years in the reservoir area,the total amount of sedimentation in the reservoir area was 21567 cubic metre,which had a certain impact on the storage capacity of the lower reservoir area.