柳堰集水库渔光互补工程对水环境影响的数值模拟研究  

Study on numerical simulation of impact of fishery-light complementary project on water environment in Liuyanji Reservoir

作　　者：张万顺[1,2,3] 邓浪浪 彭虹[4] 刘馨 蒋安娜 周奉 ZHANG Wanshun;DENG Langlang;PENG Hong;LIU Xin;JIANG Anna;ZHOU Feng(School of Resource and Environmental Sciences,Wuhan University,Wuhan 430072,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;China Institute of Development Strategy and Planning,Wuhan University,Wuhan 430072,China;School of Water Resources and Hydropower Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]武汉大学中国发展战略与规划研究院,湖北武汉430072 [4]武汉大学水利水电学院,湖北武汉430072

出　　处：《水资源保护》2023年第5期1-8,共8页Water Resources Protection

基　　金：国家自然科学基金项目(41877531)。

摘　　要：针对渔光互补工程对水环境的影响缺乏精准量化研究的问题,构建了适用于柳堰集水库的水动力水质水生态工程耦合数值模型,模拟了2020年8月自然现状和渔光互补工程实施后库区水温、化学需氧量、溶解氧、总磷、总氮、叶绿素a的质量浓度时空分布,并计算了水体富营养化指数。结果表明:渔光互补工程实施后,柳堰集水库的水温、溶解氧和叶绿素a质量浓度分别下降了0~6℃、0~0.02 mg/L和0~0.0005 mg/L,化学需氧量质量浓度上升了0~10 mg/L;总磷、总氮质量浓度变化趋势在光伏板下伏水域和未布设光伏板水域呈现较大差异性,光伏板下伏水域总磷质量浓度升高了0~0.814 mg/L,总氮质量浓度降低了0~0.125 mg/L;各水质指标在渔光互补工程实施前后的差异随时间推移逐渐减小,入汇口水体富营养化程度显著下降,中央库区灌溉取水口水体富营养化指数提高了5.61~16.00。In response to the lack of precise quantitative research on the impact of fishery-light complementary projects on the water environment,a hydrodynamic-water quality-water ecology-engineering coupling numerical model was constructed in Liuyanji Reservoir.The spatiotemporal distribution of mass concentration of water temperature(T),chemical oxygen demand(COD),dissolved oxygen(DO),total phosphorus(TP),total nitrogen(TN),and chlorophyll-a(Chl-a)in the reservoir area was simulated after the implementation of the fishery-light complementary project in August 2020,and the eutrophication index of the water body was calculated.The results showed that after the implementation of the fishery-light complementary project,T and the mass concentrations of DO and Chl-a in Liuyanji Reservoir decreased by 0~6℃,0~0.02 mg/L,and 0~0.0005 mg/L,respectively,while the mass concentration of COD increased by 0~10 mg/L.The mass concentrations of TP and TN varied very differently in the water area under photovoltaic panel than in the water area without panel.The mass concentration of TP in the water area under photovoltaic panel increased by 0~0.814 mg/L,while the mass concentration of TN decreased by 0~0.125 mg/L.The differences in water quality indicators before and after the implementation of the fishery-light complementary project gradually decreased with time,and the eutrophication degree of the water at the inlet significantly decreased.The eutrophication index of the water at the irrigation intake in the central reservoir area had increased by 5.61~16.00.

关 键 词：渔光互补工程 富营养化 水动力水质水生态工程耦合数值模型 柳堰集水库 

分 类 号：X824[环境科学与工程—环境工程]