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一、基本情况及治理现状山西省忻县地区汾河流域,地处汾河水库上游,包括宁武、静乐两县,有44个公社,22.7万人。总面积592.5万亩。汾河发源于宁武县管涔山汾源灵治,流经80公里,到静乐县的湾子大队出境。沿途有怀道、西马坊、新堡、鸣河、东西辗河等15条较大支流汇入汾河。在忻县地区范围内,流域面积为481.7万亩,占总面积的81.3%,多年平均径流3.15亿立方米,流量8.2秒立方米。地貌类型多为土石山区与黄土丘陵区,海拔1,140—2,772米。全区共有水土流失面积330.5万亩,占流域面积的68.6%。根据静乐县沙会水文站多年实测资料,从1951—1980年共流失肥土约3.16亿吨。汾河水库建库22年来,已淤积库容29,200万立方米,占总库容的41.7%。由本区输送的泥沙约有1.77亿
I. Basic Situation and Status of Treatment The Fen River in Xin County, Shanxi Province, is located in the upper reaches of Fenhe Reservoir, including Ningwu County and Jingle County, with 44 communes and 227,000 people. The total area of 5925000 mu. Fen River originated in Ningwu County Guan Shan Fenyuan Lingzhi, flowing through 80 kilometers to Jingle County Bay Brigade exit. There are Wudao along the way, West Horse Square, Newcastle, Ming River, East and other big tributaries 15 into the Fen River tributaries. In the Xin County area, the basin area of 4,817,000 mu, accounting for 81.3% of the total area, the average annual runoff 315 million cubic meters, the flow of 8.2 seconds cubic meters. Landform types are mostly rock and mountain and loess hilly region, 1,140-2,772 meters above sea level. The total area of soil and water loss 330500 mus, accounting for 68.6% of the basin area. According to the measured data of Shale Hydrometric Station in Jingle County for many years, a total of 316 million tons of fat soil was lost from 1951-1980. For 22 years, the Fenhe Reservoir has accumulated 292 million cubic meters of silt, accounting for 41.7% of the total storage capacity. Sediment transported by this area has about 177 million