西溪河洛古水电站库区泥石流特征及工程影响研究

Features of Debris Flow in Luogu Hydropower Station Reservoir Area of Xixi River and Study of Its Engineering Impact

洛古水电站位于青藏高原东部横断山系东缘的大凉山山脉,调查表明,库区内共发育泥石流沟谷8条。在系统分析泥石流发育地质环境背景的基础上,该文重点对库区泥石流沟的分布发育特征及泥石流沟谷特征进行详细论述,并对流域面积较大、活动性较强的3条典型泥石流沟的容重、流量、冲出量等重要工程参数进行了计算,对泥石流沟状况与发展趋势作了进一步分析,研究表明在水库运行及施工期间泥石流灾害对工程建设影响有限。

The Luogu hydropower station is located in the Daliangshan mountain of east marginal belt of the Qingzang plateau. Investigation results show that there develop 8 debris flow gullies in the reservoir area. Based on the background features of the geological environment, it focuses on studying the distribution feature of de- bris flow and the gully characteristics in the reservoir area in detail, then 3 debris flow gullies with high activity are calculated for the important parameters of debris flow, such as unit weight, designed discharge, potential depositional amount, and a further analysis of the status and development trend are made. The study shows that debris flow disasters have limited impact on the engineering construction in the reservoir construction period.