于桥水库生态清淤过程中降雨侵蚀出露滩地底泥对水库水质的影响  

Influence of Sediment Erosion by Rainfall on Water Quality of Yuqiao Reservoir during Ecological Dredging

作　　者：张扬[1] 申彦科[1] 陈海梅 Zhang Yang;Shen Yanke;Chen Haimei(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水电工程设计》2020年第4期31-33,56,共4页Design of Water Resources & Hydroelectric Engineering

摘　　要：于桥水库生态清淤施工期间干场作业,水库处于低水位运行状态,多数滩地出露,若遇强降雨,底泥中氮、磷营养物质会进入库区水体,影响水库氮、磷营养物质的含量。利用土壤侵蚀及氮、磷营养物质流失计算公式,求解土壤侵蚀和氮磷负荷源项,采用于桥水库平面二维水动力-水质模型,预测其在不同雨强下对水库水质的影响。结果表明,高强度降雨对于桥水库总氮的影响较小,对总磷影响较大,但总体影响范围仍主要位于库周沿岸浅水域和东部滩地较多的库区。During the ecological dredging of Yuqiao Reservoir,the reservoir operates at low water level and most beaches are exposed.In case of heavy rainfall,nitrogen and phosphorus nutrients in the sediment will enter the water body and affect the content of nitrogen and phosphorus nutrients in the reservoir.Based on the calculation formula of soil erosion and loss of nitrogen and phosphorus nutrients,the source of soil erosion and nitrogen and phosphorus load are solved,and two-dimensional hydrodynamic and water quality model of Yuqiao Reservoir is used to predict its impact on water quality under different rainfall intensities.The results show that high intensity rainfall has little effect on the total nitrogen but great effect on the total phosphorus,the overall impact scope is mainly in the shallow water around the reservoir and the area with more beaches in the east.

关 键 词：于桥水库 水动力-营养物质输移模型 不同雨强 出露滩地降雨侵蚀 

分 类 号：X524[环境科学与工程—环境工程]