摘要
[目的]分析近10年渭河干流陕西段水质变化趋势及其成因。[方法]根据《地表水环境质量评价办法》,参照《地表水环境质量标准》(GB 3838-2002),利用2001～2010年渭河干流陕西段的环境质量监测数据,对近10年该流域水质的变化趋势进行评价,并初步探究其原因。[结果]2001～2010年,渭河干流水污染程度呈持续减轻态势,主要污染物高锰酸盐指数、五日生化需氧量、氨氮、石油类、挥发酚呈显著下降趋势,综合污染指数降幅达62.7%,如期实现了消灭渭河黑臭的目标。但是,近10年渭河干流污染仍很严重,各年均为重度污染,西安段仍然是渭河治理的重点。[结论]该研究为渭河陕西段的环境综合治理提供了科学依据。
[Objective] The study aimed to analyze the changing trends of surface water quality and their causes of Weihe River in Shaanxi Province over past ten years.[Method] Based on the available monitoring data of Weihe River in Shaanxi Province from 2001 to 2010,the changing trends of surface water quality of Weihe River in Shaanxi Province during recent ten years were assessed according to the Assessment Method of Surface Water Quality and Environmental Quality Standards for Surface Water（GB 3838-2002）.Moreover,the possible reasons for the trends were also proposed.[Result] From 2001 to 2010,there was a relatively decreasing trend of water pollution in Weihe River due to the considerable decline in the content of the main environmental pollutants like permanganate index,5-day biochemical oxygen demand（BOD5）,ammonia nitrogen,petroleum and volatile phenol.Meanwhile,its comprehensive pollution index fell by 62.7%,eliminating Weihe River’s black and stink on schedule.However,the overall surface water quality of Weihe River was still polluted heavily in each year,and the control of Xi’an section should be paid more attention to.[Conclusion] The research could provide scientific references for the comprehensive environmental control of Weihe River in Shaanxi Province.
出处
《安徽农业科学》
CAS
2012年第25期12609-12612,共4页
Journal of Anhui Agricultural Sciences
关键词
水环境质量
水污染
渭河
陕西
Water quality
Water pollution
Weihe River
Shaanxi Province
