梅湾水库水环境状况分析及建议

摘要

基于梅湾水库2016年水质逐月监测数据,采用单因子评价法和综合营养状态指数法对水库水质和富营养化状况进行了评价,并对主要环境因子的相关性及水库污染源进行了分析.结果表明:梅湾水库总体水质为Ⅳ类,超标污染物为总磷,属轻度污染.水库水质除11月符合Ⅲ类标准外,其余月份稳定在Ⅳ类.而总氮全年处于劣Ⅴ类水平.水库冬春季为中营养状态,夏秋季为轻度富营养状态,总体上处于轻度富营养状态.叶绿素a与水温、高锰酸盐指数之间两两正相关,相关性极显著,但与N、P相关性不显著.总氮与高锰酸盐指数、水温之间显著正相关.同时,针对库区污染源提出了相应的环境整治建议.%Based on the monthly monitoring data of water quality in 2016,the water quality and eutrophication status of the reservoir were evaluated by single factor evaluation and comprehensive nutrition state index method,and the correlation of main environmental factors and the reservoir pollution sources were analyzed.The results showed that the general water quality of Mei Wan reservoir was class IV,the exceeding pollutant was TP,and belonged to mild pollution level.In November,the water quality meet class Ⅲ standard,while in the remaining months it meet class Ⅳ standard.TN was in the inferior class Ⅴ level throughout the year.Reservoir in winter and spring was medium? eutrophic,and in summer and autumn was mildly eutrophic,overall it was in a mild eutrophic state.There was a very significant correlation between chl-a,water temperature and CODMn,but the correlation was not significant between P and N.There was significant positive correlation between TN,CODMn and water temperature.Meanwhile,we put forward environmental remediation proposals to the pollution sources in the reservoir area.