Tian Ying, Long Zeqing, Li Qiangang
School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China.
Department of Public Health and Preventive Medicine, Changzhi Medical College, Changzhi, 046000, China.
Environ Sci Pollut Res Int. 2023 Feb;30(9):23538-23552. doi: 10.1007/s11356-022-23887-9. Epub 2022 Nov 3.
Wastewater discharge reduction (WDR) is a key breakthrough point for China's environmental protection. Based on China's 30 provincial data from 2011 to 2017, this paper applied the logarithmic mean Divisia index (LMDI) method to clarify the determinants of WDR at national, regional, and provincial levels. Except for wastewater discharge factor, economic development, and total population, four innovative factors, total water application intensity, water environment cost, water treatment industry development level, and drainage infrastructure investment scale were first proposed in this study. The results indicated that from 2011 to 2017, at the national level, total water application intensity and water treatment industry development level were dominant contributors to WDR, while other factors all inhibited WDR. At the regional level, the results of wastewater discharge factor, economic development, and water environment cost were similar to the national level. The drainage infrastructure investment scale had a positive effect on WDR in Northeast and South China while having a negative effect on other regions. And except for Northeast China, the water treatment industry development level promoted WRD, while the total population inhibited WDR. Finally, the determinants of WDR at the provincial level were investigated. On this basis, targeted corresponding policies were provided in this paper.
减少废水排放是中国环境保护的关键突破点。基于2011年至2017年中国30个省份的数据，本文运用对数平均迪氏指数（LMDI）方法，在国家、区域和省级层面厘清了减少废水排放的决定因素。本研究首次提出除废水排放因子、经济发展和总人口外的四个创新因素，即总用水强度、水环境成本、水处理行业发展水平和排水基础设施投资规模。结果表明，2011年至2017年，在国家层面，总用水强度和水处理行业发展水平是减少废水排放的主要贡献因素，而其他因素均抑制了减少废水排放。在区域层面，废水排放因子、经济发展和水环境成本的结果与国家层面相似。排水基础设施投资规模对中国东北和华南地区的减少废水排放有积极影响，而对其他地区有负面影响。除中国东北地区外，水处理行业发展水平促进了废水减排，而总人口抑制了废水减排。最后，研究了省级层面减少废水排放的决定因素。在此基础上，本文提出了针对性的相应政策。
