Numerical simulation of organic pollutant transport in unsaturated soil
文献类型：会议论文
| 作者 | Xue, Q; Feng, XT; Wang, HY; Liu, JJ |
| 出版日期 | 2004 |
| 会议日期 | OCT 11-14, 2004 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 关键词 | organic pollutant petroleum leakage coupled dynamic model numerical simulation |
| 页码 | 1081-1085 |
| 英文摘要 | A coupled dynamic mathematical model has been established to predict transient flow and organic pollutant transport in unsaturated soil. Solutions to the coupled equations are accomplished by the characteristic finite difference method and implicit pressure explicit saturation method. The numerical model is used to predict the temporal and spatial distribution of contaminant concentrations. Numerical shows soil texture has a direct connection with soil leaching height, The maximum leaching depth is 60cm in clay soil, whereas for 35cm in sand soil. It is mainly because that petroleum pollutant leaching properties vary with soil texture which influences total porosity, soil permeability and water velocity. Moreover, under certain leakage conditions, the saturation caused by petroleum pollutant has a trend of increase with time. The leakage of petroleum pollutant to subsurface, it will have displacement vertically and horizontally under the pressure of weight and capillary pressure, but the direction of its transport and migration is vertical as a whole. As pollutant migrate the capillary zone, the capillary tension restrict the vertical movement. The pollutant must overcome the entrapment pressure of oil-water interface before it entering the capillary zone, and pollutant accumulates on the top of capillary zone to obtain pressure. The pore pressure of pollutant exceeds the entrapment pressure of oil-water interface, it enters capillary zone and forms a lens above the groundwater level. It provides theory evidence for studying distribution and inclination of organic pollutant transport in subsurface environment, and the science evidence and method are provided for evaluating of soil quality and forecasting pollutant transport in soil, prevention and cure of pollutant. |
| 会议录 | Land and Water Management: Decision Tools and Practices, Vols 1 and 2
 |
| 会议录出版者 | CHINA AGRICULTURAL UNIV |
| 会议录出版地 | BEIJING |
| 语种 | 英语 |
| WOS研究方向 | Agriculture ; Water Resources |
| WOS记录号 | WOS:000229506800153 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4389]  |
| 专题 | 岩土力学所知识全产出_会议论文 岩土力学所知识全产出 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech |
| 推荐引用方式 GB/T 7714 | Xue, Q,Feng, XT,Wang, HY,et al. Numerical simulation of organic pollutant transport in unsaturated soil[C]. 见:. Beijing, PEOPLES R CHINA. OCT 11-14, 2004. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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