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篇目详细内容 |
【篇名】 |
Application of Visual MODFLOW to assess the Sewage Plant accident pool leakage impact on groundwater in the Guanting Reservoir area of Beijing |
【刊名】 |
Frontiers of Earth Science in China |
【刊名缩写】 |
Front. Earth Sci. China |
【ISSN】 |
1673-7385 |
【EISSN】 |
1673-7490 |
【DOI】 |
10.1007/s11707-010-0118-1 |
【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
【出版年】 |
2010 |
【卷期】 |
4
卷3期 |
【页码】 |
320-325
页,共
6
页 |
【作者】 |
Weifang SHI;
Weihua ZENG;
Bin CHEN;
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【关键词】 |
groundwater; leakage; Visual MODFLOW; adsorption; dynamic reaction |
【摘要】 |
In this paper, Visual MODFLOW is used to simulate groundwater flow and transport within the study area based on a certain scenario, assessing the leakage impact of a Sewage Plant accidental pool on groundwater using NH3-N as the assessment factor. In the model constructed, soil absorption and degradation was taken into account; the adsorption process of NH3-N adopted the Langmuir equation and the degradation was simplified as a first-order dynamic reaction. The leakage process was defined as a recharge with contaminants in the case that where there are two accidents happening to the Sewage Plant within a one month interval. The result of the model indicated that the NH3-N concentration of groundwater increased sharply when the Sewage Plant was malfunctioning. The peak of NH3-N concentration under the accident pool was about 8.0 × 10?5?mg/L at the first accident. When the second accident happened, the NH3-N concentration increased to a maximum of about 1.1 × 10?4mg/L. At a location of about 20?m from the accident pool, the concentration declined to about one sixth of the center, which demonstrated that the NH3-N concentration increase caused by leakage of the accident pool was little, and the spatial influence also was small. The paper provides a method of dealing with the transport of physically and chemically reactive substances in groundwater with Visual MODFLOW and assessing the Sewage Plant accident pool leakage impact on groundwater quantitatively. |
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