基于环境基尼系数的苏南运河排水权分配

Allocation of flood drainage rights of Sunan Canal based on environmental Gini coefficient

借鉴环境基尼系数,对苏南运河区域排水权配置进行研究。选择运河沿线防洪包围区域人口、GDP和土地面积为控制指标,通过绘制洛伦茨曲线计算相应的环境基尼系数。在排水权总量一定的情况下,以控制指标的环境基尼系数之和最小为目标函数,设定合理的约束条件,计算得到各区域排水权的优化分配方案。结果表明:在优化配置后,基于人口、GDP和土地面积3项指标的环境基尼系数分别为0.000 2、0.144 1和0.079 6,均优于现状,环境基尼系数的平均变化幅度为0.026 3;基于环境基尼系数的分配方式能够兼顾各地区的实际情况,有利于统筹城市防洪与区域防洪之间的关系,在确保城市防洪安全的前提下减轻苏南运河防洪压力。

Based on the environmental Gini coefficient,this study investigated the allocation of regional flood drainage rights in the Sunan Canal.The population,GDP,and land area of urban flood control regions along the canal are selected as the control indexes,and the environmental Gini coefficient is calculated by drawing the Lorentz curve.In the case of a certain total amount of flood drainage right,the objective function is to minimize the sum of the environmental Gini coefficients of indicators,and reasonable constraints are set.According to the optimal allocation model of flood drainage right,the optimal allocation scheme of each region is calculated.The results show that after the optimal allocation based on population,GDP and land area is better than the current situation,the environmental Gini coefficients,which are 0.0002,0.1441 and 0.0796 respectively,are better than the current allocation,and the average variation range of environmental Gini coefficient is 0.0263.The allocation model based on the environmental Gini coefficient can consider the actual situation of each region and is conducive to the overall planning of the relationship between urban flood control and regional flood control.On the premise of ensuring the city safety,the optimal allocation of flood drainage right alleviates the pressure of flood control in the Sunan Canal.