摘要
目的试图对渭河宝鸡段水质污染情况及变化趋势做出评价。方法采用模糊综合评价与加权平均相结合的方法,对渭河宝鸡段1998—2002年水质进行研究。结果除2002年水质接近国家地面水环境质量标准GBZB11999IV级标准外,其他年份均高于IV级标准。其主要污染指标的变化趋势为:化学需氧量、氨氮、高锰酸盐指数有所下降;生化需氧量基本持平;石油类、溶解氧和亚硝酸盐氮略有上升。结论近年来渭河宝鸡段水质均超过国家地面水IV级标准,污染较严重。
Aim To understand the pollution situation and variation tendency of quality of Weihe water in Baoji.Methods Adopting the method of fuzzy comprehensive appraisal combined with weighted average, appraising the water quality of Baoji section of Weihe river from 1998 to 2002.Results Only the quality of water in 2002 is close to the standard of four grades of the national environmental quality level of surface water (GBZB1-1999), and the other years′ are higher than the standard of four grades. The variation tendency of the pollution index mainly is: chemical oxyen demand, ammonia nitrogen and high manganese sour salt index are in decline to some extent; biochemical oxygen demand is fair basically; the type of petroleum, dissolving oxygen and inferior nitrate nitrogen rise a little.Conclusion In recent years the pollution of Weihe river water is relatively serious.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第2期220-223,共4页
Journal of Northwest University（Natural Science Edition）
基金
陕西省自然科学基金资助项目(2001KR38)
关键词
渭河
宝鸡市
水环境
模糊综合评价
Weihe river
Baoji City
the environment of water
fuzzy comprehensive appraisal
