【摘要】 城市水循环系统运行状态的稳定与否关系着城市水安全的健康程度,而城市水代谢效率作为表征城市水循环系统是否健康运行的重要依据则成为研究的焦点。以天津市为例,依据DEA模型的基本原理构建城市水循环系统的代谢效率评价指标体系,选取天津市近15年相关指标数据作为样本,采用改进型主成分分析法对指标进行筛选,进而预测天津市水循环系统的代谢效率及变化趋势,并评估与分析其城市水循环系统的代谢效率。根据研究分析结果,为保证天津市水循环系统的持续健康发展,提高天津市水循环系统的代谢效率,需要在控制污废水排放、降低水耗、节约水资源等方面增加研发投入。降低污废水的直接排放量,提升水资源的利用效率,降低水耗,并积极构建水资源的输入通道,保持城市经济低水耗、低污染发展。更多还原

【Abstract】 The continuous and healthy operation of urban water cycle system is an important prerequisite and basis for ensuring urban water security,while the urban water metabolism efficiency is an important basis to characterize the health of urban water cycle system. Based on the basic principles of the DEA model,this paper constructed a metabolic efficiency evaluation index system of the urban water cycle system,selected nearly 15 years data of relevant indicators from Tianjin City as a sample,used the improved principal component analysis method to filter the index,to measure,analyze and evaluate the metabolic efficiency and trend of the urban water cycle system. According to the results,to ensure the healthy development and to improve the metabolic efficiency of the water cycle system in Tianjin City,responsible government departments need to increase the R & D investments in controlling wastewater discharge,reducing water consumption,and conserving water resource. Meanwhile,it is necessary to reduce the direct discharge of wastewater,improve the efficiency of water resource utilization,reduce water consumption,and actively build the input channel of water resources,encourage the urban economy to adopt a low water consumption and low pollution development path.更多还原