Stochastic Analysis of Dense Nonaqueous Phase Liquid Dissolution in Naturally Heterogeneous Subsurface Systems

Download or read book Stochastic Analysis of Dense Nonaqueous Phase Liquid Dissolution in Naturally Heterogeneous Subsurface Systems written by Xin Fu and published by . This book was released on 2002 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The theoretical prediction is compared with the DNAPL concentration data from the Hanford site, where millions of pounds carbon tetrachloride were dumped in disposal facilities. In spite of the error and uncertainty involved in the field data, there is reasonable agreement between the field observations and the predicted mean DNAPL concentration field. It is concluded that the dominant factor affecting the field-scale DNAPL dissolution is the variability of the dissolution rate coefficient, which is a function of spatial distribution of DNAPL and permeability. The bypassing effect, reflecting the diversion of water flow around zones of high DNAPL saturation with low aqueous relative permeability, is another important factor that can reduce the effective dissolution rate significantly. The limitations of the study are discussed regarding the data collection and further evaluation of the extrapolation.