The identification research of emergency treatment technology for sudden heavy metal pollution accidents in drainage basin based on D-S evidence theory

As a sudden heavy metal pollution accident occurs in a drainage basin, decision makers need to quickly select the optimal emergency treatment technology and formulate emergency schemes according to the actual accident characteristics. Therefore, a two-step identification method of emergency treatmen...

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Bibliographic Details
Published in:Water science and technology 2019-12, Vol.80 (12), p.2392-2403
Main Authors: Luo, Yulan, Liu, Ying, Du, Qianying, Chen, Qingsong, Cheng, Zhihui
Format: Article
Language:English
Subjects:
Access
Accidents
Aluminum oxide
Arsenic
Basins
China
Decision making
Delphi method
Diversion channels
Drainage
Drainage basins
Emergencies
Emergency Treatment
Environmental impact
Environmental Pollution
Experts
Fault diagnosis
Feasibility studies
Heavy metals
Identification
Metals
Metals, Heavy
Methods
Pollution
Risk assessment
River basins
Technology
Theories
Water pollution
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Summary:As a sudden heavy metal pollution accident occurs in a drainage basin, decision makers need to quickly select the optimal emergency treatment technology and formulate emergency schemes according to the actual accident characteristics. Therefore, a two-step identification method of emergency treatment technology for sudden heavy metal pollution accidents based on Dempster-Shafer (D-S) evidence theory is proposed, in order to screen the optimal emergency treatment technology effectively and solve the conflict among fusion data in the process of index quantification. Firstly, the available technologies were screened preliminarily by the primary identification indexes (technical characteristic indexes). Secondly, the weight synthesis method based on the D-S evidence theory and attribute assignment was utilized to score the secondary identification indexes (technical evaluation indexes) of each available technology comprehensively. Finally, the optimal emergency treatment technology for this sudden pollution accident was obtained. Taking the sudden arsenic pollution accident of the Picang flood diversion channel in Linyi, Shandong Province as an example, the activated alumina adsorption dam technology was extracted successfully, which is in accordance with the actual treatment situation. The result shows that the method has strong feasibility and practicability, which can provide strong decision support for dealing with sudden pollution accidents in drainage basins efficiently.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2020.065