峡江水利枢纽运行后库区水质变化及对策建议

Water quality changes in the reservoir area after the operation of Xiajiang water control project and countermeasures

协调水资源开发利用与水资源保护的关系,促进人水和谐,是水利工程建设和运行必须考虑的问题.探讨峡江水利枢纽运行前后库区水质变化,对保障库区内居民生产生活用水安全具有重要意义.本文以库区内8个水功能区的监测断面氨氮、高锰酸盐指数、总磷作为主要分析指标,从时间及空间序列探究这3个指标的相互联系及变化规律,分析了水质变化原因并提出相应对策建议.结果表明,水库运行后库区内水功能区(按双因子评价)水质整体较好,基本控制在Ⅱ~Ⅲ类水之间.高锰酸盐指数较稳定,但有缓慢增长趋势;氨氮和总磷呈显著相关性,有一定上升趋势.

Coordinating the relationship between water resources development and utilization and water resources protection,and promoting harmony between people and water are issues that must be considered in the construction and operation of water conservancy projects.It is of great significance to study the changes of water quality in the reservoir area before and after the operation of Xiajiang water conservancy project.Taking the ammonia nitrogen,permanganate index and total phosphorus in the monitoring sections of the eight water functional zones in the reservoir area as the main analytical indicators,the interaction and variation of these three indicators were investigated from the time and space sequences,and the causes of water quality changes were analyzed.Propose corresponding countermeasures.The results show that the water quality of the water function area(according to two-factor evaluation)in the reservoir area after the operation of the reservoir is generally good,and the basic control is between II and III water.The permanganate index is relatively stable,but has a slow growth trend;ammonia nitrogen and total phosphorus are significantly correlated and have a certain upward trend.