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合理确定圩区排涝模数对于降低涝灾损失具有重要意义。圩区内土地利用性质不同,产汇流机制和排涝标准也不同,但排涝模数计算方法基本一致。本文依据《江苏省暴雨洪水图集》材料,采用20年一遇最大24h暴雨设计,充分考虑圩内河道调蓄作用。以东港镇为例,对勤新联区排涝模数进行计算,同时对其他圩区的排涝模数计算提供借鉴。
It is of great significance to determine the drainage modulus in the polder area reasonably to reduce the waterlogging loss. Land use in polder areas is different in nature, and the production and sink flow mechanism and drainage standards are different, but the calculation methods of drainage modulus are basically the same. Based on the material of “Jiangsu Province Rainstorm and Flood Atlas”, this paper adopts the maximum rainstorm design in 20 years and takes full account of the regulation and control of the river within the polder. Taking Donggang Town as an example, the drainage modulus of Qinxin District is calculated, and the drainage modulus calculation of other polder areas is also provided.