Efficiency evaluation for regional urban water use and wastewater decontamination systems in China: A DEA approach |
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| Affiliation: | 1. Sydney Institute of Language & Commerce (SILC Business School), Shanghai University, Shanghai 201800, PR China;2. School of Business, Anhui University, Hefei 230039, PR China;1. SHU-UTS SILC (Sydney Institute of Language & Commerce) Business School, Shanghai University, Shanghai 201899, PR China;2. School of Management, University of Science and Technology of China, Hefei 230026, PR China;3. School of Business, Anhui University, Hefei 230601, PR China;1. College of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road 1, Nanjing, 210098, China;2. School of Civil Engineering and Architecture, Nanchang Hangkong University, Fenghenan Road 696, Nanchang, 330063, China;1. Center for Studies of Marine Economy and Sustainable Development, Liaoning Normal University, No.850 Huanghe Road, Shahekou District, Dalian City, Liaoning Province 116029, China;2. Faculty of Management and Economics, Dalian University of Technology, No.2 Linggong Road, High-Tech District, Dalian City, Liaoning Province 116024, China;1. SHU-UTS SILC (Sydney Institute of Language & Commerce) Business School, Shanghai University, Shanghai 201899, PR China;2. School of Business, Anhui University, Anhui Province, Hefei 230601, PR China |
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| Abstract: | 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. |
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| Keywords: | China Data envelopment analysis Water use efficiency Wastewater decontamination efficiency |
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