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１９９８年长江发生了自１９５４年以来的又一次流域性大洪水，长江中下游干流沙市—螺山、武穴—九江河段及洞庭、鄱阳两湖水位均超过历史最高洪水位。长江中下游堤防工程发挥了重要作用，获得了巨大经济效益。通过对长江中下游堤防防洪效果的分析，并依据有关实际资料对主要堤防的防洪经济效益进行计算，结果表明，建国以来逐年培修的堤防工程在１９９８年洪水中的防洪效益价值量达４０６７亿元。
In 1998, another major flood occurred in the Yangtze River Basin since 1954. The water levels of the Shashi-Luoshan, Wuxiu-Jiujiang reach and the Dongting and Poyang Lakes in the middle and lower reaches of the Yangtze River exceeded the highest historical flood level. The middle and lower reaches of the Yangtze River embankment project has played an important role, access to great economic benefits. Based on the analysis of the dike flood control effects in the middle and lower reaches of the Yangtze River and the calculation of the flood control economic benefits of the main levees based on the actual data, the results show that the flood control benefit of flood dike projects cultivated annually since the founding of PRC was 406.7 billion yuan .