太湖流域小圩区设计排涝模数计算

Calculation for the Designed Flood Drainage Modulus in Small Low-lying Region of Taihu Lake Basin

圩区设计排涝流量的计算对圩区的水安全和有效减免涝灾经济损失有着重要意义。为此以设计流量过程调蓄计算方法确定设计排涝模数,并以太湖流域圩区为实例,分析了圩区设计排涝模数计算的数学模型,得出设计排涝模数与水面率之间的二次抛物线关系,其系数与圩区面积有很好的响应关系。

Calculation of designed flood drainage flow rate has significant importance for water safety and effectively reduction of economic loss from water logging disaster in low-lying region.The designed flood drainage modulus was determined by calculating the flow hydrograph,and the mathematical model for calculation of designed flood drainage modulus was analyzed based on condition of low-lying region in Taihu Lake basin.And the quadratic parabola was obtained between the designed flood drainage modulus and water surface ratio,and its coefficient was in good response with area of low-lying region.