摘要
目的 了解汉江安康段及其流域水资源卫生质量近 30年来的变化 ,为水资源开发利用提供科学依据。方法 收集安康市 196 2年以来各类水质数据 ,通过整理分析 ,根据《生活饮用水卫生标准》和《地面水环境质量标准》评价。结果 汉江安康段内地面水硬度 6 0～ 2 90 mg/L,感官性状良好 ;氯化物、硫酸盐、化学耗氧量、氨氮、硝酸盐氮、亚硝酸盐氮含量 90年代均较 80年代显著上升 ,但均未超标 ;氟、挥发酚、重金属及农药、放射性指标均未超标 ;大肠菌群 (6 98个 /L)低于地面水 级标准 ;全市水源 91.2 %含碘低于 10 μg/L;部分地下水含硒高达 90 μg/L。结论 汉江安康段水质良好 ,主要河流水质均达地面水 级以上标准 ;人为造成的水源污染有上升趋势 ,只要做好水资源保护 ,可以做为理想的生活饮用水源。
Objective To understand the kinetic changes of sanitary quality of water source of Ankang section of Hanjiang River and its valley in recent 30 years,and to provide scientific basis for the development of water resource Methods The various kinds of data on water quality of Ankang city were collected since 1962,and were sorted,analyzed and evaluated on the basis of Sanitary Standard for Drinking Water and Standard for Environmental Quality of Surface Water Results The surface water of Ankang section of Hanjiang River revealed good organoleptic indexes with hardness of 60~290 mg/L (CaCO 3) The indexes such as chloride,sulfate,chemical oxygen demand,ammonia,nitrate and nitrite in 1990s' revealed higher levels compared with those in 1980s',all of them didn't exceed the related national sanitary standards The indexes such as fluoride,volatile phenols,heavy metal,pesticide(DDT and 666) and radioactive constituents were all qualified Total coli form(698/L) was lower than the standard of Grade Ⅱ for surface water.91 2% of the water samples from the water source of the whole city of Ankang revealed the levels of iodine less than 10 μg/L Some water samples of ground water presented higher levels of selenium of 90 μg/L Conclusion The water body of Ankang section of Hanjiang River had a good water quality The sanitary water quality of main branches accorded with the standard of Grade Ⅱ for surface water Although there was slight water pollution and the intensity of pollution caused by human activities tended to increase,Ankang section of Hanjiang River still could be selected as an ideal drinking water source under the effective environmental protection on water resource
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2001年第5期283-285,共3页
Journal of Environment and Health
