水资源保护2026，Vol.42Issue(2)：50-58,9.DOI:10.3880/j.issn.1004-6933.2026.02.006
无锡市排涝对外部承泄河道洪涝情势的影响及机制研究
Research on impact and mechanism of drainage from Wuxi City on flood situation of external drainage channels
摘要
Abstract
In response to the potential spatial transfer of flood risks caused by the improvement of urban drainage capacity and the adverse impact on flood control safety of external drainage channels,a refined hydrological and hydrodynamic model was constructed in the central urban area of Wuxi City and adjacent Jiangnan Canal as the study area.The scenario analysis method was used to compare the differential effects of three drainage modes,namely natural gravity drainage,current pump station drainage,and increased pump station capacity drainage,on flood risks inside and outside the city.The results show that the use of pumping stations can significantly reduce the peak water level in urban areas and shorten the duration of exceeding the warning water level.However,under the existing scheduling rules,the water level improvement effect brought by further improving the pumping station capacity is no longer significant.The momentum exchange effect generated by the concentrated strong discharge at the mouth of the discharge channel in Wuxi City forms a hydraulic barrier along the way,leading to flow reversal and water level rise in the upstream section,while the downstream section is less affected.When the base flow rate of the discharge channel is low,forced lateral inflow is more likely to change the original flow state of the channel,showing obvious low flow sensitivity characteristics.关键词
城市排涝/洪涝风险/承泄河道/水文水动力模型/无锡市Key words
urban drainage/flood risk/drainage channel/hydrological and hydrodynamic model/Wuxi City引用本文复制引用
李曦亭,王磊之,高玉琴,梁志红,苏鑫,揭仕青..无锡市排涝对外部承泄河道洪涝情势的影响及机制研究[J].水资源保护,2026,42(2):50-58,9.基金项目
水利部水旱灾害防御重点实验室开放研究基金项目(WX20241100510) （WX20241100510）
国家自然科学基金项目(52239008,52509014) （52239008,52509014）
江苏省自然科学基金项目(BK20251476) （BK20251476）
江苏省卓越博士后计划项目(2025ZB322) （2025ZB322）
