大伙房水库上游土壤侵蚀对水质的影响

Influence on Water Quality of the Soil Erosion in the Upstream of Dahuofang Reservoir

为了研究土壤侵蚀对大伙房水库水质的影响,分析了水库上游流域2004—2013年的土壤侵蚀数据和水库各观测断面水质的关联关系,探讨了各级土壤侵蚀面积比与水库水质的关系。结果表明:水库上游流域土壤侵蚀面积及不同侵蚀强度的面积百分比与水库水质各指标间呈明显的相关性;水库上游土壤侵蚀是导致大伙房水库水质恶化的主要原因之一,也是非点源污染的重要来源,需加强水库上游水土流失治理。

In order to study the influence of soil erosion to the water quality of Dahuofang Reservoir, this paper analyzed the relationship of soil erosion and water quality of each observation section with the data of upstream and in the reservoir in 2004?2013. BP neural network simulation and prediction method were used to make a comprehensive evaluation of the water quality of Dahuofang Reservoir and to explore the relationship between soil erosion and water quality. The results show that the index of water quality has an obvious correlation with the soil erosion area in the upstream of the reservoir basin and the percentage of different erosion intensity area. Soil erosion in the upstream of the reservoir is one of the main reasons for water quality deterioration and it is also an important source of non?point source pollution. The control of soil erosion in the upstream of the reservoir should be enhanced.