| ENVIRONMENTAL SCIENCE AND ENGINEERING |
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Source identification of accidental water pollution in a tidal river network based on a water environment model and database |
| CHEN Zhengxia1, DING Yi2, MAO Xuhui1, WANG Zheng1, JIA Haifeng1 |
1. School of Environment, Tsinghua University, Beijing 100084, China;
2. Shanghai Urban Planning & Design Research Institute, Shanghai 200040, China |
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Abstract The source of accidental water pollution can be accurately and quickly identified using a water environment model and database. The Foshan section of the Xijiang and Beijiang Rivers was taken as an example to build a EFDC (environmental fluid dynamics code) hydrodynamic and WASP (water quality analysis simulation program) water quality model. The WASP water quality model included the WASP-EUTRO model for normal pollutants and the WASP-TOXI model for toxic pollutants. The EFDC-WASP model sorts information on the pollutant risk source at each automatic monitoring section to establish a toxic and normal pollutant source identification database. A hypothetical scenario having the Shakou monitoring station in the Chancheng district measuringa high Cr6+ concentration was taken as an example with 3 possible pollutant emission situations identified through a database query. Initial loads for each situation 1-3 were estimated according to a first-order kinetics equation, with the location and load for each situation then calculated by the model. The pollutant source was quickly and accurately identified.
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| Keywords
tidal river network
environmental fluid dynamics code (EFDC) model
water quality analysis simulation program (WASP) model
database
accidental water pollution
source identification
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Issue Date: 15 November 2017
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2017,
Vol. 57
