HR: 1340h
AN: H13B-1245    [Abstracts]
TI: Coordinate Mapping of Analytical Transport Solutions to Non-Uniform Flow Fields
AU: * Craig, J R
EM: jrcraig@uwaterloo.ca
AF: University of Waterloo, 200 University Ave West, Waterloo, ON N2L 3G1, Canada
AB: While analytical solutions for solute transport continue to be used as screening and predictive tools for contaminated site analysis, there remain many limitations to their applicability. Despite the recent advances in their ability to simulate complex chemistry (e.g., parent-daughter decay and mixing-driven chemical equilibrium), most existing analytical transport models depend upon the critical assumptions of uniform flow and uniform saturated thickness. A time-of-flight-based mapping procedure has been developed to take existing analytical solutions for transport in uniform flow and map them to simple non-uniform flow fields. This presentation will discuss some of the inherent assumptions in the mapping method, as well as its strengths and its weaknesses. It was found that the mapping approach, exact for purely advective transport problems, can be reliably used in steady-state flow systems with wells, surface water features, and (to a limited degree) mild recharge and heterogeneity. The mapping errors are on the same magnitude as those due to discretization error or upstream weighting in numerical simulation methods.
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 1849 Numerical approximations and analysis
DE: 1894 Instruments and techniques: modeling
SC: Hydrology [H]
MN: 2007 Fall Meeting