摘要
针对流经陕西境内的渭河干流主要断面的流量逐年减少,而入河污染负荷却保持着增加趋势,导致渭河水质超标严重这一水环境现状,分析了渭河流域陕西片的降雨特性,并以降雨形式、地表特性(土壤类型,前期土壤湿润程度,土地利用)、地形特征等因素为基础,利用SCS模型进行了流域产流量的模拟计算。从降雨量与产流量的关系表明,单场降雨量小于6 mm时较难产生地表径流;由于流域片内除径流外没有可以利用的其他水资源。提出了改善渭河水质须削减入河污染负荷和增加河道流量并行措施。
With a great decreasing of annual flow, and a big increasing of pollutant loading, the Weihe River suffers serious pollution at most of the sections in Shaanxi sub-basin. In this paper, a characterization of rainfall, runoff and pollutant loading in this sub-basin, and an analysis of the water environment in this area are analyzed. In order to calculate the quantity of surface runoff due to rainfall in the sub-basin, local runoff analysis is conducted by taking into account of rainfall patterns, surface characteristics （soil type, soil wetness, land utilization etc. ） and topographic features of the sub-basin area, and using the SCS （soil conservation services） model. The result indicates that rainfall less than 6 mm is difficult to bring runoff. In order to improve the water environment of the Weihe River, the measures of reducing pollutant load and increasing flow of the river are formulated.
出处
《太原理工大学学报》
CAS
北大核心
2007年第5期428-430,共3页
Journal of Taiyuan University of Technology
基金
陕西省自然基金资助项目(2006D06)
陕西省教育厅专项基金资助项目(05JK249)
关键词
降雨
径流
水环境
渭河
rainfall
runoff
water environment
Weihe River
