流域水环境综合承载力多级多指标可拓评估

Extension Evaluation of Water Environment Comprehensive Carrying Capacity at Basin Scale

从水资源、水环境与水生态系统出发,结合流域水资源开发利用现状,构建了流域水环境综合承载力评价指标体系,建立了基于多级多指标可拓评价的流域水环境综合承载力评估模型。以广东省东江流域为例,依据可拓集合中的关联函数与关联度,由相应等级的关联度大小对流域水环境综合承载力评价体系中水资源、水环境与水生态三个子系统进行可拓评级分析,计算流域水环境综合承载力水平于某一等级的关联度,进而将其由简单的定性描述拓展到定量计算,从而得到较为准确的流域水环境综合承载力水平评价等级及其空间分异特征。

From the perspective of water resources,water environment and water ecosystem,combined with current situation of water resources exploitation at basin scale,a comprehensive carrying capacity evaluation index system is constructed,and a comprehensive carrying capacity evaluation model based on multi-stage multi-index extension evaluation is established.Taking Dongjiang River Basin in Guangdong Province as an example,the appropriate level of correlation is used to conduct extension rating analysis of the three subsystems of water resources,water environment and water ecology in the water environment comprehensive evaluation system according to the correlation function and the correlation of extension set.A certain level of correlation is calculated for the water environment comprehensive carrying capacity of the basin,which makes the level of the water environment comprehensive carrying capacity at basin scale from simple qualitative description to quantitative calculation,and can obtain more accurate level of the water environment comprehensive carrying capacity and its spatial differentiation characteristics.