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1 基本情况贵州省息烽县地处贵阳、遵义两市之间,南距贵阳66km,北距遵义90km,位处黔中腹地,气候温和,降水充沛,但地表水并不丰富。流域面积大于20km~2的河流有12条,其中大于100km~2的有1条。按流域长度分,大于10km以上的河流有6条,平均每100km~2有河长17.8km。根据水资源调查测算,多年平均降水量为1117mm,水面、陆面蒸发量分别为893.mm和659.3mm,多年平均地面径流量4.567亿m~3。不同频率的地面径流:丰水年(P=20%)为6.158亿m~3,平水年(P=50%)4.657亿m~3,偏枯年(P=75%)3.722亿m~3,特枯水年(P=95%)2.721亿m~3,地下水可开发水量1.257亿m~3。人均占有量2000m~3左右,低于全省和全国人均水平。建国50多年来,全县已建各类水利工程620余处,其中蓄水工程227处(含小(一)型水库2处,小(二)
1 Basic Situation Xifeng County, Guizhou Province is located between Guiyang and Zunyi. It is located at 66km to Guiyang in the south and 90km to Zunyi in the north. It is located in the central hinterland of Guizhou Province with a mild climate and abundant rainfall but the surface water is not rich. There are 12 rivers whose drainage area is more than 20km ~ 2, of which there are one more than 100km ~ 2. According to the length of the river basin, there are 6 rivers above 10km, with an average length of 17.8km for every 100km ~ 2 river. According to the water resources survey, the average annual precipitation is 1117mm, the water surface and land surface evaporation are 893.mm and 659.3mm respectively, and the average annual surface runoff is 456.7 million m 3. Surface runoff at different frequencies: 614.8 million m ~ 3 in wet years (P = 20%), 467.7 million m ~ 3 in plain water years (P = 50%) and 372.2 million m ~ The dry year (P = 95%) was 272.1 million m 3, and that of groundwater was 125.7 million m 3. Per capita possession of about 2000m ~ 3, lower than the province and the national per capita level. Over the past 50 years since the founding of the People’s Republic of China, the county has built more than 620 water conservancy projects, including 227 water storage projects (including 2 small reservoirs and 2 small reservoirs,