Efficiency evaluation for regional urban water use and wastewater decontamination systems in China: A DEA approach

被引:127
作者
Bian, Yiwen [1 ]
Yan, Shuai [1 ]
Xu, Hao [2 ]
机构
[1] Shanghai Univ, Sydney Inst Language & Commerce, SILC Business Sch, Shanghai 201800, Peoples R China
[2] Anhui Univ, Sch Business, Hefei 230039, Peoples R China
基金
中国国家自然科学基金;
关键词
China; Data envelopment analysis; Water use efficiency; Wastewater decontamination efficiency; DATA ENVELOPMENT ANALYSIS; ENVIRONMENTAL PERFORMANCE; DECOMPOSITION; MODEL;
D O I
10.1016/j.resconrec.2013.11.010
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Rapid economic growth and urbanization in China have resulted in great water consumption in recent years. China has been facing increasingly severe water shortage crisis, especially in urban areas. This paper focuses on performance analysis for regional urban water use and wastewater decontamination systems in China. To this end, a DEA-based approach is developed. In the proposed approach, the efficiency of the system is decomposed into water use efficiency and wastewater decontamination efficiency. In the wastewater decontamination sub-system, the purified wastewater (reusable water) is treated as a desirable output; while in the water use sub-system, it is incorporated as a fixed input, which cannot be decreased in the process of efficiency optimization. The efficiency of the system is defined as the average of the two sub-systems' efficiencies. The proposed approach can find inefficiencies caused by the internal factors between sub-systems, which cannot be identified using the traditional DEA approaches. We finally apply the proposed approach to analyze the efficiencies of regional urban water use and wastewater decontamination systems in China. Based on the application results, some findings and implications for efficiency improvement of urban water management in China are achieved. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:15 / 23
页数:9
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