Stochastic modeling of transport and degradation of reactive solutes in heterogeneous aquifers

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Title: Stochastic modeling of transport and degradation of reactive solutes in heterogeneous aquifers
Author: Fadel, Ziad Joseph
Abstract: Hydraulic conductivity fields (K ) and degradation rate constants (a ) are commonly used in predicting the fate and transport of reactive contaminants . The natural heterogeneity in aquifer porous materials and its effect on hydrological parameters such as K and a has to be accounted for by using an appropriate stochastic approach . The spatial distribution of K and its correlation with a were examined . Random fields of K having prescribed mean , variance , and correlation lengths were generated using the HYDRO _GEN method . Transport simulations were conducted for an ensemble of two -dimensionally heterogeneous aquifers . Both positive and negative correlations of K and a were considered . The solute ? ?s remaining mass in both the positive and negative correlation scenarios was found to be , on average , within a small range . Concentration profiles for a positive K -a correlation displayed a more uniform behavior of the contaminated plume , compared to a more variable spreading in the negatively correlated cases .
URI: http : / /hdl .handle .net /1969 .1 /3987
Date: 2006-08-16

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Stochastic modeling of transport and degradation of reactive solutes in heterogeneous aquifers. Available electronically from http : / /hdl .handle .net /1969 .1 /3987 .

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