Review of Design Flood Estimation Methods for Cascade Reservoirs

Abstract

流域上游修建水库后将改变下游河道的洪水特性，直接影响下游断面的设计洪水，因此应该考虑上游水库的调洪影响及设计断面以上各部分洪水的地区组成。针对我国目前主要采用同频率组成法和典型年组成法来拟定设计洪水地区组成的现状，综述梯级水库设计洪水的研究进展，分析现有方法的优缺点，探讨推求梯级水库设计洪水的新途径，并提出进一步开展研究工作的建议。 The construction of upstream reservoirs will certainly change the flood characteristics and affect the design floods in the downstream river. As a result, the reservoir operation and regional composition of upstream and inter-basin inflows should be considered when estimating design flood in the downstream controlled sections. The equivalent frequency and typical year synthesis are the most frequently used regional composition analysis methods in China, the research advancement of design flood estimation methods for cascade reservoirs are summarized and reviewed. New approaches of design flood derivation for cascade reservoir are also discussed by assessing the advantage and disadvantage of these methods. The research directions of design flood for cascade reservoir are also suggested.