Simulation of Regional Ground-Water Flow on a Transboundary Flowline; Trans-Pecos, Texas and Chihuahua, Mexico

by Barry J. Hibbs,
Bruce K. Darling,
John M. Sharp, Jr.,
John B. Ashworth,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A two-dimensional, steady-state, cross-sectional model was used to evaluate boundary conditions, residence times, and potential transboundary movement along a 28 mi (45 km) flowline between the Diablo Plateau of western Texas and the Sierra de San Ignacio of northern Chihuahua, Mexico. Results of the cross-sectional model with geologically distributed values of permeability provided a good fit to the pre-development potentiometric surface. Moderately-low recharge rates and travel times predicted by the model agree with published estimates and estimates derived by environmental isotopes. Model results suggest potential for some transboundary movement of ground water, even under presently undeveloped conditions. Hydrogeologic and isotopic data needed to further assess potential transboundary flow are specified.

Subject Headings: Two-dimensional models | Groundwater flow | Developing countries | Hydrogeology | Cross sections | Two-dimensional flow | Steady states | Texas | United States | Mexico

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