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一、工程概况天桥水电站位于黄河中游河口镇以下199公里的干流上,下距山西保德、陕西府谷两县城8公里,为一座低水头、大流量的河床式径流电站。工程兴建的目的是发展电力灌溉,改变陕北和晋西北老区干旱低产面貌,同时也为开发黄河多沙河段提供经验。工程于1970年动工,1977年投产发电。坝址以上流域面积约为40.4万平方公里,为典型的峡谷水库。区间90％以上均为黄土丘陵沟壑区,有皇甫川、红河、清水川、偏关河等支流汇入。由于流域坡度大,暴雨历时短,洪水峰高,来势猛,并挟带大
First, the project profile Tianqiao Hydropower Station is located in the middle reaches of the Yellow River estuary below the mouth of 199 kilometers of the mainstream, the distance from Shanxi Baode, Shaanxi Fugu two counties eight kilometers, is a low head, high flow riverbed runoff power station. The purpose of the construction of the project is to develop electric power irrigation and change the appearance of drought and low yield in the old areas of north Shaanxi and northwestern Shanxi, as well as to provide experience for the development of the Dousha Reach of the Yellow River. Construction started in 1970, put into operation in 1977. The dam area above the basin area of about 404,000 square kilometers, is a typical canyon reservoir. More than 90% of the interval is loess hill and gully area, with Huangfuchuan, Honghe, Qingshuichuan, partial off the river and other tributaries into. Due to the large watershed gradient, torrential rain lasted for a short time and the flood peaked, the situation became fierce and brought along with it