一、概述坂头水库位于我市酉北约30公里处，是座集城市供水、农田灌溉和防洪为一体的中型水利工程。流域集雨面积67．3平方公里，灌溉农田2万亩，多年平均城市洪水4000多万方。由于水库建设在雨洪河流宁溪的中下游，溪流源短流急，洪水陡涨陡落，对水库安全威胁较大。过去我处 I. Overview Sakamoto Reservoir is located in the city about 30 km north-west, is a collection of urban water supply, farmland irrigation and flood control as one of the medium-sized water conservancy projects. Rainfall catchment area of ​​67.3 square kilometers, irrigated farmland 20000 mus, the average urban floods for many years more than 4,000 square. Due to the construction of reservoirs in the middle and lower reaches of the Ningxia River, where the stream of rain is flowing, the stream source is in short supply and the flood plunges sharply and steeply, threatening the reservoir security. I used to be