陕西渭河河段水质与水量综合评价

W. Guo, Jie Chen, Y. Sheng, Jie Wang
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引用次数: 2

摘要

利用2000 ~ 2008年渭河河段水质、水量及水质、水量综合结果对渭河河段的水环境状况进行了分析。讨论了渭河流域主要水文站径流与COD、NH3-N浓度的相关性。从结果中可以得出结论。(1)渭河在陕西的中下游已经受到污染。兴平控制段至潼关控制段的COD、NH3-N BOD5和DO均超过国家地表水水质标准。(2)渭河平均径流量为51.91×108 m3,约占1959 ~ 2008年渭河年平均径流量的70%。从渭河河段径流量来看,有效水资源在减少。水资源短缺导致的水质问题在该地区日益严重。(3)渭河上游COD、NH3-N浓度与径流量的相关性较弱,渭河中下游污染物浓度与径流量呈平均负相关。与COD相比,NH3-N与渭河径流的相关性更明显。
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Integrated evaluation of water quality and quantity of the Wei River reach in Shaanxi Province
The water environment condition of the Wei River reach in Shaaxi province was analysed in terms of the water quality, water quantity and the integrated results of the water quality and quantity, based on the data collected over the period from 2000 to 2008. Moreover, the correlation between the runoff and the concentrations of COD and NH3-N at the main hydrological stations in the Wei River reach was discussed. The conclusions can be drawn from the results. (1)The middle and lower stream of the Wei River reach in Shaanxi province has already been polluted. The concentrations of COD, NH3-N BOD5 and DO exceed the national surface water quality standards from the Xingping control section to the Tongguan control section. (2) The average runoff of the Wei River amounts to 51.91×108 m3, which equals to 70 percent of the average annual runoff volume of the Wei River over the period from 1959 to 2008. The available water resource descends in terms of the runoff volume of the Wei River reach. The scarcity of water resource resulting from the water quality problems has been more and more severe in the region. (3) The concentrations of COD, NH3-N correlates to the runoff weakly in the upstream of the Wei River, while the average negative correlation between the pollutant concentrations and runoff is shown in middle and lower stream of the Wei River. Compared to COD, NH3-N correlates to the runoff the Wei River more apparently.
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