基于DPSIRM汉江生态经济带水环境承载力评价研究

Study on the Evaluation of Water Environment Capacity of Hanjiang River Ecological Economic Belt Based on DPSIRM

为了评价湖北汉江生态经济带水环境承载力,在DPSIRM概念框架的基础上,构建了水环境承载力评价指标体系,较全面、系统地分析评价了2007~2016年湖北汉江生态经济带水环境承载力的变化趋势及影响因素。研究结果表明:2007~2016年湖北汉江生态经济带水环境承载力综合指数呈上升态势,评价等级从2007年IV级转变为2016年II级,表明了水环境承载力在逐步提高;驱动力目标层对水环境承载力的影响比重最高,评价指数上升幅度最大,压力目标层和管理目标层次之,表明驱动力目标层是影响湖北汉江生态经济带水环境承载力的最重要因子;对水环境承载力影响程度最大的6个指标层依次为:人均GDP、单位GDP能耗、农田灌溉亩均用水量、人均日生活用水量、单位耕地面积化肥施用量和环境污染治理投资占GDP比重。研究结果对湖北汉江生态经济带水环境改善、水资源合理利用和生态环境建设具有一定的理论参考价值和实践指导意义。

In order to evaluate the water environment carrying capacity of the Hanjiang River eco-economic belt,based on the concept framework of DPSIRM,the evaluation index system of the water envi-ronment carrying capacity was constructed,and the changing trend and influencing factors of the water environment carrying capacity of the Hanjiang River in Hubei province from 2007 to 2016 were analyzed and evaluated systematically.The results show that the overall water environment carrying capacity of the Hubei Hanjiang River eco-economic belt has risen from 2007 to 2016,and the evaluation level has changed from Class IV in 2007 to Grade II in 2016,indicating that the water environment carrying capacity is gradually increasing.The driving force target layer has the highest impact on the water environment carrying capacity,and the evaluation index is the highest,followed by the pressure target layer and management target layer,indicating that the driving force target layer is the most important factor affecting the water carrying capacity of the ecological economic belt of the Hanjiang River in Hubei Province.The six indicator layers that have the greatest impact on the degree of water environment carrying capacity are:per capita GDP,energy consumption per unit of GDP,average water consumption per Mu of farmland irrigation,per capita daily water consumption,per unit of arable land fertilizer application,and environmental pollution management investment in the proportion of GDP.The research results are of theoretical reference value and practical guidance to the improvement of water environment,the rational use of water resources and the construction of ecological environment in Hubei Hanjiang River.