Zoning and Analysis of Control Units for Water Pollution Control in the Yangtze River Basin, China

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Zoning and Analysis of Control Units for Water Pollution Control in the Yangtze River Basin, China

In order to meet the needs of the control-unit-based water pollution prevention problem in China, we proposed a comprehensive control unit zoning method with the combined basic administrative region and objective watershed management. The method can effectively connect the natural characteristics of watershed water sources, three-level zoning of water resources, and comprehensively consider the pollution distribution, socio-economics and many other factors. The zoning process includes four steps: (1) Generate the multi-level hydrological unit; (2) Identify the multi-element water catchment units; (3) Obtain the control unit with the administrative boundary as the boundary; (4) Check and adjust the results to meet the actual needs. Based on this method, the Yangtze River Basin was divided into 568 control units with a total area of 1.91 million km2. These control units were used as the basic unit to analyze the water quality status and the results show that the upper reaches have good water quality, while the lower reaches have poor water quality and more serious water pollution. Our study helps the Ministry of Environmental Protection of China develop the list of control units that are needed to improve water quality during the “13th Five-Year Plan”, with a goal to provide technical support for control-unit-based water pollution prevention and control in the future.

Keywords: water pollution prevention; control unit; catchment unit; Yangtze River Basin 

Fuliang Deng 1,2, Tao Lin 2,* ID , Yue Zhao 3 and Ying Yuan 1
1 Institute of Space Information Technology, Xiamen University of Technology, Xiamen 361024, China;
fldeng8266@xmut.edu.cn (F.D.); yuanying@xmut.edu.cn (Y.Y.)
2 Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
3 Environmental Planning Institute, Ministry of Environmental Protection, Beijing 100012, China;
zhaoyue@caep.org.cn
* Correspondence: tlin@iue.ac.cn; Tel.: +86-592-619-0651
Received: 21 June 2017; Accepted: 1 August 2017; Published: 4 August 2017

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