燕山水库生态环境演变特征及综合治理对策OA

Taking Yanshan Reservoir in the upper reaches of the Huai River as the object,based on the long-term water quality monitoring data from 2010 to 2024,ecological environment bulletins,and on-site investigation results of the basin,this study analyzes the trend of ecological environment changes during the reservoir operation,diagnoses the prominent ecological problems,evaluates the effectiveness of comprehensive management,and proposes targeted optimization approaches.The study has shown that from 2010 to 2018,cage aquaculture and agricultural non-point source pollution led to fluctuations in water quality in the reservoir area,with total phosphorus and ammonia nitrogen exceeding the standards,and the water body was close to mild eutrophication.After the restoration and improvement since 2019,the water quality reached Class Ⅲ standards,maintaining mesotrophy,and achieving water ecological restoration.However,there are still deficiencies in the control of non-point source pollution,the restoration of water-level fluctuation belt,and cross-regional collaborative governance.This study provides support and reference for the management of Yanshan Reservoir and similar reservoirs in the Huai River Basin.