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利用分蓄洪区蓄纳江河超量洪水,是一项重要的非工程防洪措施。汉江下游杜家台分洪区自1956年投入运用以来,为保卫武汉市和汉江下游两岸的安全共分洪运用19次,是国内分洪运用最为频繁,也是运用效益极为显著的分蓄洪区之一。本文从分析杜家台分洪区分蓄洪运用对减少河道洪峰流量、降低洪峰水位的作用入手,通过对其各次分洪运用的情况及其与汉江中下游其它防洪措施的关系的分析、比较,达到估算分洪区运用后所产生的经济效益价值量的目的。经过初步分析、估算,杜家台分洪区自投入运用以来所产生的经济效益价值量约为23.9亿元。
It is an important non-engineering flood prevention measure to use the flood diversion area to store excessive floods of rivers. Since Dujiantai flood diversion area in the lower reaches of the Hanjiang River has been put into operation in 1956, it has been one of the flood diversion floodplains where flood diversion is the most frequently used in China and 19 floods are used to ensure safe flood diversion across the lower reaches of the Han River. Based on the analysis of the role of flood diversion in Dujiatai flood diversion to reduce the flood peak discharge of flood courses and reduce the peak water level, the paper analyzes and compares the application of flood diversion and other flood control measures in the middle and lower reaches of the Han River Diversion area after the use of the value of economic benefits arising from the purpose. After preliminary analysis, it is estimated that the economic benefit value of Dujiatai flood diversion area since it was put into operation is about 2.39 billion yuan.