Industrial wastewater is one of thethree industrial wastes.If substandard industrial wastewater is discharged intothe environment, there will be a serious impact on the environmental quality.Excessive emissions also indicate that water resources utilization isunreasonable. Therefore, it is of great significance to study the changingtrends and influencing factors of industrial wastewater discharge in order toeffectively conserve resources and improve the environmental quality. In thisstudy, the spatial autocorrelation and the environmental Kuznets curve wereused to study the spatial-temporal changes and characteristics of industrialwastewater discharge at the provincial scale and prefectural scale in China in2004-2015. Then, the Logarithmic Mean Divisia Index was used to analyze theinfluencing factors of wastewater discharge in this period. China's totalindustrial wastewater discharge showed a trend of increasing at the beginningand then decreasing, and more than half provinces or cities show this trend ofdecoupling from economic development. Moreover, wastewater discharge was higherin the east region and lower in the west region at both the provincial scaleand prefectural scale, but the aggregation degree on the prefectural scale ismore obvious than that on the provincial scale. The technical effect has ageneral inhibitory effect on industrial wastewater discharge, but it alsopromoted the discharge in a few cities; the structure effect on industrialwastewater discharge has generally changed from promotion to inhibition duringthe study period; and economic effect and population effect were mainly topromote industrial wastewater discharge. Therefore, a few cities shouldaccelerate technology upgrading and industrial restructuring in recent years inorder to change the promoting effect, and most cities need to strengthen theimplementation of economic measures and improve the residents' environmentalawareness.
Ma,Bingran,Tian,Guangjin,Kong,Lingqiang.Spatial-temporal characteristics of China's industrial wastewater discharge atdifferent scales[J]Environmental science and pollutionresearch,2020,03.