Kim Jeongkon, Corapcioglu M Yavuz
Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, USA.
J Contam Hydrol. 2003 Aug;65(1-2):137-58. doi: 10.1016/S0169-7722(02)00105-5.
A vertically averaged two-dimensional model was developed to describe areal spreading and migration of light nonaqueous-phase liquids (LNAPLs) introduced into the subsurface by spills or leaks from underground storage tanks. The NAPL transport model was coupled with two-dimensional contaminant transport models to predict contamination of soil gas and groundwater resulting from a LNAPL migrating on the water table. Numerical solutions were obtained by using the finite-difference method. Simulations and sensitivity analyses were conducted with a LNAPL of pure benzene to study LNAPL migration and groundwater contamination. The model was applied to subsurface contamination by jet fuel. Results indicated that LNAPL migration were affected mostly by volatilization. The generation and movement of the dissolved plume was affected by the geology of the site and the free-product plume. Most of the spilled mass remained as a free LNAPL phase 20 years after the spill. The migration of LNAPL for such a long period resulted in the contamination of both groundwater and a large volume of soil.
开发了一个垂直平均二维模型，以描述因地下储油罐泄漏或溢出而进入地下的轻质非水相液体（LNAPL）的区域扩散和迁移。将NAPL运移模型与二维污染物运移模型相结合，以预测由于LNAPL在地下水位上迁移而导致的土壤气体和地下水污染。采用有限差分法获得数值解。使用纯苯的LNAPL进行了模拟和敏感性分析，以研究LNAPL迁移和地下水污染。该模型应用于喷气燃料对地下的污染。结果表明，LNAPL迁移主要受挥发影响。溶解羽流的产生和移动受场地地质和自由产物羽流的影响。泄漏20年后，大部分泄漏物质仍以游离LNAPL相存在。如此长时间的LNAPL迁移导致了地下水和大量土壤的污染。
