水质水量结合评价渭河干流(陕西段)水资源变化

为了全面掌握渭河(陕西段)干流水资源变化总体情况,本文收集2000-2008年陕西段渭河干流水文、水质监控断面的监测资料,分别从水质、水量以及两者相结合的角度分析了渭河干流的水环境状况,并重点讨论了渭河干流主要水文站径流量与COD、NH3-N污染物的同期监测浓度的相关关系。结果表明:渭河干流(陕西段)中下游水体水质为劣V类,已受到严重污染。渭河干流可利用的水资源量有所下降,其中80%以上的水资源水质为V类,不能满足水体利用的水质目标要求,渭河干流"水质型"水资源短缺的问题凸显。渭河干流上游径流量与COD、NH3-N污染物的浓度呈低相关性,随着流程变化,径流量与COD、NH3-N污染物的浓度在渭河干流的下游华县水文站已表现为中度负相关。相比较而言,渭河干流河流水量的变化对COD浓度的影响程度大于对NH3-N污染物浓度的影响。

Integrated evaluation of water quality and quantity in Weihe River reach of Shaanxi Province

The water environment condition of Weihe River reach in Shaanxi Province was analysed in terms of integrated water quality and quantity,based on the data collected over the period from 2000 to 2008.Moreover,the correlation between runoff and COD,NH3-N were major discussed at the main hydrological stations in Weihe River reach.The results show that the middle and lower stream of Weihe River reach in Shaanxi Province has already been polluted.The concentrations of COD,NH3-N BOD5 and DO exceed the national sur...