莱西市重点水库水质污染现状评价及生态化改善对策研究

Evaluation of water quality pollution status of key reservoirs in Laixi City and countermeasures for ecological improvement

水库水质的健康状态和生态化治理问题事关流域发展和国计民生。本研究调研分析了2018-2020年间莱西市境内重点水库出口重点市控断面的水质污染情况。结果表明:总磷、BOD5、锰和COD是主要的超标因子,其出现次数分别为13次、8次、8次和4次,且高格庄水库超标因子最多(4个)。汛期生活污水的混入、生活垃圾的无组织堆放以及农田面源污染是造成水库部分水质指标超标的主要因素。因此,只有在明确污染源的基础上分别制定因地制宜的环境治理措施,才能建立起长效的水库水质污染生态化改善机制。

The healthy state of reservoir water quality and ecological improvement are related to the development of river basin and the national economy and people’s livelihood.This study investigated and analyzed the water quality pollution of the key municipal control sections at the outlet of key reservoirs in Laixi City from 2018 to 2020.The results showed that total phosphorus,BOD5,manganese,and COD were the main over standard factors,and their occurrence times were 13 times,8 times,8 times,and 4 times,respectively.Especially,the over standard factors of Gaogezhuang reservoir were the most(4).The mixing of domestic sewage in flood season,the unorganized stacking of domestic garbage and the non-point source pollution of farmland were the main factors that cause the water quality index of some reservoirs to exceed the standard limits.Therefore,the long-term ecological improvement mechanism of reservoir water pollution can be established only when the environmental control measures are formulated according to local conditions on the basis of defining pollution sources.