南水北调西线一期工程区泥石流规模预测及其对调水工程的影响

A Study on the Scale Forecast and the Influence of Debris Flow on the Water Diversion Project in the West Line Project of Water Diversion from Upper Yangtze River into Upper Yellow River

泥石流是南水北调西线一期工程区的主要山地灾害之一,可能对调水工程建设与运行期间的工程安全构成一定的威胁和危害。据调查,工程区分布有一定规模的有现代泥石流活动的沟111条、潜在性泥石流沟58条。主要探讨了泥石流发生规模预测中的清水流量、泥石流峰值流量、一次泥石流流出总量等参数的计算方法,在此基础上引入主、支流量比,分析了泥石流堵河问题及其可能堵河高度与回水长度,为评估泥石流对调水工程的影响提供了科学可行的定量分析方法。

Debris flow is one of the main mountain hazards in the West Line of Water Diversion Project From South to North. And it may have threat and danger to the construction and running safety of the Water Diversion Project. With in the engineering site there are 111 active debris flow channels with some scales, 58 potential debris flow channels. This paper mainly discusses the index calculation method of the water discharge, the maximal discharge of debris flow, the total amount of a debris flow and so on. Based on this, the discharge ratio of the main river and the tributary is introduced to analyze the problem of the blockage of the river and the possible height and back water length. This paper provides scientific, feasible, quantitative analyzing method to evaluate the influence of debris flow on the Water Diversion Project.