无实测资料河流环境容量核算中设计流量推求

水环境容量核算过程中,经常遇到小流域没有实测径流资料,或者有短期实测径流资料但又无法展延的情况,其设计流量只能通过间接途经来推求。文章以颖河流域为例,应用等值线图法、水文比拟法和径流系数法推算该流域的年径流量,相互验证和比较上述3种方法的推算结果,并将成果用于计算设计流量。结果表明,计算方法能满足水环境容量核算的精度要求。

Calculation of Design Flux in Checking Water Environment Capacity for Ungauged Rivers

Since small valleys are either without gauged runoff data or with short time runoff data which cannot be stretched in the process of checking water environment capacity,some indirect methods were used to calculate the design flux.Taking Yinghe catchment as example,isoline method,hydrologic assimilation method as well as runoff coefficient method was used to calculate annual runoff of the catchment,with validating and comparing of results and applying to the calculation of design flux,which can satisfy the request of calculation precision for water environment capacity.