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| DOI：10.13522/j.cnki.ggps.2020079 |
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| Assessing Development and Utilization of Reclaimed Wastewater in Northern China Using the Topsis Method |
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YU Pengming, GUAN Xiaoyan, CHEN Junying
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1. Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China;2.Key Laboratory of Gricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, China
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| Abstract: |
| 【Background】The shortage of fresh water has become a bottleneck to socioeconomic development in northern China, and reusing the recycled wastewater could partly alleviate this problem. Existing studies on reclaimed wastewater reuse were qualitative and not comprehensive. Considering the strategies proposed by the central government to improve reuse of unconventional water resources, it is practically significant to evaluate and analyze the comprehensive development and utilization of recycled wastewater.【Objective】The purpose of this paper is to present a method to systematically evaluate the development and utilization of recycled wastewater with a view to improve its sustainable reuse and provide baseline dataset for policy-making.【Method】We considered the 13 provinces, including municipalities and autonomous regions, in northern China, and selected eight factors in the evaluation: water resources, water type, population, economic investment, water pipe network construction, sewage treatment, water level and ecological environment, which could affect the development and utilization of recycled wastewater. The analysis was based on the Topsis method – a comprehensive evaluation method having been used in a wide range of fields. Evaluation of the calculated results was graded using the cluster analysis method.【Result】Beijing was ranked top, followed by Liaoning and Hebei provinces, in the comprehensive evaluation from 2014 to 2017 due to its advanced water supply and drainage infrastructure. In contrast, Qinghai and Gansu provinces were ranked at the bottom. From 2015 to 2017, the comprehensive evaluation revealed that the development and utilization of reclaimed wastewater in Shaanxi province had gradually improved, while that in Shanxi province had been in decline.【Conclusion】The Topsis model can distinguish the development and utilization of reclaimed water in northern provinces, and can better evaluate the development and utilization of reclaimed water in northern regions. |
| Key words: recycled water; Topsis model; comprehensive evaluation; northern region |
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