摘要
对河流进行合理、客观的水质评价,能为改善河流污染状况、保护地表水资源提供科学性依据。基于渭南潼关吊桥断面2010—2016年的水质实测数据,利用基于熵权的TOPSIS法从不同时间尺度对渭河水质进行评价,并分析水质的变化趋势。结果表明:渭河主要的水污染因子为NH3-N和CODMn;水质的优劣与水量的丰枯呈正相关性;不同时间尺度的渭河水质均呈好转的趋势。综合分析表明该方法在水质评价中可以客观地反映水质的变化情况,且通过不同时间尺度对水质进行对比研究,为地表水质评价提供一种新思路。
Reasonable and objective evaluation of water quality can provide scientific basis for improving river pollution condition and protecting surface water resources. Based on the water quality data of Weinan Tongguan bridge section on2010—2016,the TOPSIS method with entropy weight were used to evaluate the water quality of Weihe in different time scales and analyse its changing tendency. The results showed that: The main factors of water pollution in Weihe were NH3-N and CODMn. The water quality was positively correlated with the yield of water. The water quality of Weihe in different time scales showed a trend of improvement. Comprehensive analysis showed that the TOPSIS entropy method could reflect the variation in the evaluation of water quality,and provide a new idea of surface water quality evaluation by making a comparative study of water quality in different time scales.
出处
《环境工程》
CSCD
北大核心
2017年第S1期247-252,共6页
Environmental Engineering
关键词
渭河
渭南潼关吊桥断面
地表水质评价
TOPSIS法
熵权
Weihe River
Weinan Tongguan bridge section
surface water quality assessment
TOPSIS method
entropy weight
