丹江口水库170m蓄水期陶岔水域水质状况及其保障对策

The Water Quality of Taocha Water Area during the 170m Storage Period of Danjiangkou Reservoir and the Safeguarding Countermeasures

2021年10月10日丹江口水库水位蓄至170米正常蓄水位,其水环境质量受各界广泛关注。本文对2021年7~10月陶岔水域水质现状进行分析表明,除陶岔坝后位点溶解氧在10月份为Ⅲ类水外,陶岔水域水质基本保持在Ⅰ~Ⅱ类之间。分析溶解氧降低可能的原因与洪水扰动造成腐殖质耗氧和夏秋交接水处未分层有关。最后,文章从消落带利用管理、缓冲带建设、污染物释放问题研究、库周污染源监控信息系统建设等角度提出了水质保障建议对策。

On October 10, 2021, the water level of Danjiangkou Reservoir was stored to the normal water level of 170 meters, and its water environment quality has attracted widespread attention from all walks of life.This paper analyzes the current situation of water quality in Taocha waters from July to October 2021. The research shows that the water quality of Taocha waters is basically maintained in class Ⅰ~Ⅱ except that the dissolved oxygen at the rear site of Taocha dam is class Ⅲ water in October. Analysis of the decrease in dissolved oxygen may be related to the oxygen consumption of humus caused by flood disturbance and the lack of stratification at the transitional water in summer and autumn. Finally, this paper puts forward suggestions and countermeasures for water quality assurance from the perspectives of utilization management of fluctuating belts, construction of buffer belts, research on pollutant release and construction of pollution source monitoring information system around reservoirs.