焦岗湖水体污染生态风险评价

Ecological Risk Assessment of Water Pollution in Jiaogang Lake

为了对国家4A级旅游风景区焦岗湖水域进行生态风险评价,按丰水期、枯水期、平水期对水体水质进行采样分析。结果显示,常规指标污染物浓度变化较大,整体表现为平水期优于丰水期和枯水期,降雨量是影响水中TN、COD浓度的重要因素。综合指标风险值整体表现为重金属>常规指标>阴离子和盐类。Cr、Cd、TP三者之间呈显著正相关,三者之间分布机制和输入来源,很可能相同或者相近。中心沟一带的农田水是焦岗湖水质污染的重要来源,风险值较大,应作为焦岗湖水体污染控制的重点。

In order to assess the ecological risk of Jiaogang Lake in the national 4A tourism scenic spot,this paper analyzes the water quality of the water according to the wet season,dry season and flat water period.The results showed that the concentration of pollutants in the conventional indicators changed greatly,and the overall performance was that the flat water period was better than the wet and dry periods,and the rainfall was an important factor affecting the concentration of TN and COD in the water.The overall indicator value of risk for the overall performance of heavy metals>conventional indicators>anions and salts.There is a significant positive correlation between Cr,Cd,and TP.The distribution mechanism and input source among the three are likely to be the same or similar.The farmland water in the central ditch area is an important source of water pollution in Jiaogang Lake.The risk value is relatively large and should be the focus of pollution control in Jiaogang Lake.