某市地面水源水厂取水口搬迁原因分析

The Analysis of the Causes of Movement of Water Intaked Locations From Surface Water for the Water Plants in A City

为总结某市地面水源水厂在水源选择及水源卫生防护方面的经验教训，对某市近１０年内８家水厂搬迁取水口的原因作了调查分析，其原因有取水口陷入城镇建成区、辖区外来污染、原水相对封闭及工业污水影响等因素，导致水源水质下降，甚至毒物超标。对这些水厂的有关经济损失作了估算，这些水厂原取水口设施平均使用６．５年，实际服务效益年为４９９７万元·年，是预期服务效益年的４９．４％。作者对水源选择及卫生防护提出了加强预防性卫生监督，避开水源相对封闭区域。

The causes of the movement of the locations of raw water intake points of surface water sourse for 8 water plants in A city in recent 10 yeas were analysis,to summarize the experiences and lessons in the water sourse selection and its sanitary protectionon.The results showed that the decrease of the water quality and the high levels of the pollutants exceeding the higieuic standard for drinking water were caused by the following factors,such as the locations of water intake collection points from surface water surrounded by the new lyestablished residential and industrial districts,relative closed water source and external pollution industrial sewage,etc.That induced water quality to decline and excessive toxicants in water sources the actual economic benefit was 49.97 million yuany·year,which tooke 49.4% of the original estimated value,for these 8water plants,with 6.5 years of average available period of former water intake facilities.It was recommended that the measures,such as strengthening preventive sanitary inspection,the relative closed water source,selecting the best water source for several neighboring areas except.Should be taken in the water sourcer selection and its sanitary protection.