关键词: 生态基流, 生态流量, 水生生物分析, 需水分析, 综合利用水库

Abstract:

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.

Key words: ecological basic flow, ecological flow, analysis of aquatic organism, water demand analysis, multipurpose reservoir