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Publication Extents

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A modular three-dimensional finite-difference ground-water flow model
M.G. McDonald, A.W. Harbaugh
1984, Open-File Report 83-875
This report presents a finite-difference model and its associated modular computer program. The model simulates flow in three dimensions. The report includes detailed explanations of physical and mathematical concepts on which the model is based and an explanation of how those concepts were incorporated in the modular structure of the...
Seismic refraction studies in the San Juan Basin, Northwest New Mexico
D.H. Evans, L.H. Jaksha
1984, Open-File Report 83-416
The U.S. Geological Survey is studying some of the features of the earth's crust in the San Juan Basin region, northwest New Mexico. As a part of this study seismic refraction-reflection measurements were made in and around the basin using explosions and earthquakes as energy sources. Record sections and traveltime...