红水河河池河段典型水库富营养化研究

Study on Eutrophication of Typical Reservoirs in Hechi Reach of Hongshui River

为了解河池境内流域的营养化状况,文章选取2018年10月至2021年9月的红水河河池境内河段中龙滩、岩滩两个水库水质监测数据,通过对水样重要水质指标数据分析研究其富营养化程度。分析结果表明:龙滩、岩滩水库整体上处于由中营养向贫营养状态发展,河段内水质整体保持良好。两个水库总氮(totalnitrogen,TN)的综合营养状态指数最高,水库中主要超标污染物为TN,是可能引起水体富营养化的重要诱因。龙滩、岩滩水库的总氮/总磷比(total nitrogen/total phosphate,TN/TP)年平均值一直处于79.5~235.6之间,说明磷是龙滩、岩滩水库藻类生长的限制因素,均属于典型的磷(P)限制型水库。研究为河池市水资源富营养化防治与科学管理提供了科学依据。

In order to understand the eutrophication status of the basin in Hechi,this paper selects the water quality monitoring data of Longtan and Yantan reservoirs in the reach of Hongshui river from October 2018 to September 2021,and studies the eutrophication degree through the analysis of important water quality index data of water samples.The analysis results show that Longtan and Yantan reservoirs are developing from medium nutrition to poor nutrition on the whole,and the water quality in the river section remains good on the whole.The comprehensive nutritional status index of total nitrogen(TN) in the two reservoirs is the highest,and the main excessive pollutant in the reservoirs is TN,which is an important inducement that may cause water eutrophication.The annual average value of total nitrogen/total phosphorus ratio(TN/TP) of Longtan and Yantan reservoirs has always been between 79.5 and 235.6,indicating that phosphorus is the limiting factor of algae growth in Longtan and Yantan reservoirs,which belong to typical phosphorus(P) limited reservoirs.The study provides a scientific basis for the prevention and scientific management of water resources eutrophication in Hechi city.