Quantity and quality of China's water from demand perspectives. (19th November 2019)

• Record Type: Journal Article
• Authors: Li, Xian; Shan, Yuli; Zhang, Zongyong; Yang, Lili; Meng, Jing; Guan, Dabo
• Is Part Of: Environmental research letters. Volume 14:Number 12(2019:Dec.)
• Publication Date: 2019-11-19
• Subjects: embodied water use -- embodied COD discharge -- input–output analysis; Environmental sciences -- Periodicals; Human ecology -- Research -- Periodicals; Environmental health -- Periodicals; 333.7
• DOI: 10.1088/1748-9326/ab4e54
• Languages: English
• ISSNs: 1748-9326

Abstract

Abstract: China is confronted with an unprecedented water crisis regarding its quantity and quality. In this study, we quantified the dynamics of China's embodied water use and chemical oxygen demand (COD) discharge from 2010 to 2015. The analysis was conducted with the latest available water use data across sectors in primary, secondary and tertiary industries and input–output models. The results showed that (1) China's water crisis was alleviated under urbanisation. Urban consumption occupied the largest percentages (over 30%) of embodied water use and COD discharge, but embodied water intensities in urban consumption were far lower than those in rural consumption. (2) The 'new normal' phase witnessed the optimisation of China's water use structures. Embodied water use in light-manufacturing and tertiary sectors increased while those in heavy-manufacturing sectors (except chemicals and transport equipment) dropped. (3) Transformation of China's international market brought positive effects on its domestic water use. China's water use (116–80 billion tonnes (Bts))1 and COD discharge (3.95–2.22 million tonnes (Mts)) embodied in export tremendously decreased while its total export values (11–25 trillion CNY) soared. Furthermore, embodied water use and COD discharge in relatively low-end sectors, such as textile, started to transfer from international to domestic markets when a part of China's production activities had been relocated to other developing countries.