走马塘拓竣延伸工程是2008年5月国务院批复的《太湖流域水环境综合治理总体方案》安排实施的重要引排工程之一。工程主要是解决望虞河引江济太期间西岸地区的排水出路问题：在望虞河引江济太期间，望虞河西岸地区涝水不入望虞河改由走马塘拓浚延伸工程北排长江。笔者重点分析了走马塘排水对长江水环境的影响。

he Zoumatang channel dredging and expansion project is one of the important drainage projects that have been arranged by Comprehensive Management Plan of Water Environment in Taihu Basin ratified by State Council. The project aims at solving the drain path problem in the west side of Wangyu River during the Wangyu River helping Taihu Lake with diversion of Yangtze River period. The water logging of the west side of Wangyu River will be drained by the Zoumatang channel to the north into Yangtze River instead of drained into Wangyu River. The author analyzed the influence of Zoumatang drainage system on the water environment of Yangtze River.