Grey Water Footprint Assessment from the Perspective of Water Pollution Sources: A Case Study of China


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Аннотация

With the acceleration of industrialization and urbanization, the water crisis is becoming more severe and may threaten the future of sustainable development. Assessing grey water footprint (GWF) is a useful step in the prevention and control of water pollution. Conventional studies have only considered agricultural pollutants in their calculations of GWF, ignoring the roles of industrial and household wastewater. Therefore, this study calculates GWFs for the agricultural, industrial, and household sectors in 31 provinces in China from 1998 to 2012. It further analyzes spatial and temporal variations in China’s GWF. The results show that total GWF (TGWF) was relatively high from 1998 to 2002, then increased steadily and peaked in 2006, and dramatically decreased after 2006. Overall, TGWF slightly decreased over the study period. 31 Provinces were divided into five grades of TGWF: very high, high, medium, low, and very low. The provinces with high or very high TGWF, such as Hebei, Shandong, Henan, Jiangsu, Hubei, Hunan, Sichuan, Guangdong, and Guangxi, were primarily located in southeastern and southwestern China. Therefore, efforts to reduce GWF should focus on these regions. Our comparative study also provides a means of understanding how key contributors to GWF vary across the five regions. It offers a basis for the short-term and long-term development policies aimed at decreasing GWF in specific locations.

Авторлар туралы

Xionghe Qin

School of Urban and Regional Science, East China Normal University

Хат алмасуға жауапты Автор.
Email: 119682394@qq.com
ҚХР, Shanghai, 200062

Caizhi Sun

School of Urban and Regional Science, East China Normal University; Center for Studies of Marine Economy and Sustainable Development, Liaoning Normal University

Хат алмасуға жауапты Автор.
Email: suncaizhi@lnnu.edu.cn
ҚХР, Shanghai, 200062; Dalian, 116029

Qin Han

College of Earth and Environment sciences, Lanzhou university

Email: suncaizhi@lnnu.edu.cn
ҚХР, Lanzhou, 73000

Wei Zou

College of Urban and Environmental Science, Liaoning Normal University

Email: suncaizhi@lnnu.edu.cn
ҚХР, Dalian, 116029

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© Pleiades Publishing, Ltd., 2019