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- W1511156053 abstract "The reliable prediction of the fate of contaminants in the subsurface is a demanding task for modelers in the environmental sciences. We present a simulation tool that is capable of handling a variety of complex scenarios that are of interest for site remediation or natural attenuation. The modular model components include the Richards equation for (un-) saturated fluid flow which is discretized by locally mass conserving hybrid mixed finite elements. The transport equations contain (nonlinear) terms for equilibrium or kinetic sorption processes and biodegradation reactions. Microbial processes may be described by first order reactions leading to linear reaction networks or a multiplicative dual Monod model including electron donator, electron acceptor and biomass. Simulation of carrier facilitation or surfactant transport (including associated permeability changes and effects on surface tension of the fluid) are feasible as well. The systems of equations are treated with Newton's method and adaptive techniques are applied to improve the efficiency of the implementation. We present an example of coupled surfactant migration and fluid flow. Current and future work includes the application to column experiments to investigate the potential of contaminated sites for natural attenuation and the extension of the model to geochemical multicomponent transport." @default.
- W1511156053 created "2016-06-24" @default.
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- W1511156053 date "2002-01-01" @default.
- W1511156053 modified "2023-09-27" @default.
- W1511156053 title "Accurate and efficient simulation of coupled water flow and nonlinear reactive transport in the saturated and vadose zone—application to surfactant enhanced and intrinsic bioremediation" @default.
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- W1511156053 doi "https://doi.org/10.1016/s0167-5648(02)80125-3" @default.
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