安徽省某大型综合利用水库生态基流研究

大中型综合利用水库调度运行将使下游河道水文情势发生较大改变，为避免河流水生态系统功能遭受无法恢复的破坏，需要合理确定工程下游河段的生态基流。在综合分析某水库坝下河段的生态保护需求和服务功能的基础上，通过对常用的生态基流计算方法进行整理与比选，采用Tennant法、湿周法、R2-Cross法、7Q10法和90%保证率最枯月平均流量法等计算了水库下游河段的生态基流。在此基础上，综合考虑下游湿地的生态需水要求、水厂取水、工农业用水等因素，确定了工程下游河段的生态基流量。研究结果可为工程规划设计提供技术支持。 

Study on ecological basic flow for a large multipurpose reservoirs in Anhui Province

The operation of large and middle multipurpose reservoirs will change the natural hydrological regime downstream. To avoid irreversible damage to the functions of river aquatic ecosystem, it is necessary to rationally determine the ecological basic flow in the downstream channel. Taking a reservoir as a case, the methods including Tennant, Wetted Perimeter Method, R2-Cross,7Q10 and the most dried monthly average discharge with guarantee rate of 90% etc. are selected on the basis of the comprehensive analysis on the ecological protection demands and service functions of the downstream channel, through the comparison and selection of the common used ecological basic flow calculation methods. Based on the calculation results and by consideration of the ecological water demand of downstream wetland, water intake of waterworks, water demand of industry and agriculture, the ecological basic flow of the reservoir is determined.