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Xu, Jing; Xu, Min; Zhao, Yanxin; Wang, Shaofei; Tao, Minghui; Wang, Yonggui
The Science of the total environment, 12/2021, Letnik: 801Journal Article
Sudden water pollution incidents (SWPI) are random and harmful, which is a problem that cannot be ignored in ecological environment governance and economic development. Identifying spatial-temporal distribution characteristics of SWPI is essential for the disaster prevention and the early warning of water environment. The Kernel Density (DE) and spatial mean center of SWPI transfer curve were used to explore the characteristics with the dataset of 1174 cases from 2006 to 2018 in China. Results showed that: (1) From the time point of view, there was an overall upward trend in the overall number of SWPI. (2) At a regional scale, Eastern China, Southwest China, and Southern China underwent a high frequency with 69.93% of SWPI. The Fujian, Guangdong and Chongqing provinces were specified as the top 3 provinces with incident frequencies. The Yangtze River Basin and the Pearl River Basin were two regions where water pollution incidents occur more often, more than 50% of incidents among basins in China every year. (3) In general, SWPI presents a northeast-southwest distribution pattern and center of SWPI moves in the direction of west by south. (4) More than half of the incidents (57.24% of the total) were induced by illegal pollutant discharge and production safety accidents. Display omitted •Sudden water pollution incidents (SWPI) showed an upward trend from 2006 to 2018.•The number of SWPI were higher in the southeast than in the northwest China.•The Yangtze River Basin and the Pearl River Basin accounted for more than half of the total incidents.•Illegal pollutant discharge, production safety accidents and traffic accidents were major causes of SWPI.•The shift of the center of SWPI consistent with the westward transfer of pollution-intensive industries.
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in: SICRIS
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