| Abstract: | Proper discretization of a ground-water-flow field is necessary for the accurate simulation of ground-water flow by models. Although discretiza- tion guidelines are available to ensure numerical stability, current guidelines arc flexible enough (particularly in vertical discretization) to allow for some ambiguity of model results. Testing of two common types of vertical-discretization schemes (horizontal and nonhorizontal-model-layer approach) were done to simulate sloping hydrogeologic units characteristic of New England. Differences of results of model simulations using these two approaches are small. Numerical errors associated with use of nonhorizontal model layers are small (4 percent). even though this discretization technique does not adhere to the strict formulation of the finite-difference method. It was concluded that vertical discretization by means of the nonhorizontal layer approach has advantages in representing the hydrogeologic units tested and in simplicity of model-data input. In addition, vertical distortion of model cells by this approach may improve the representation of shallow flow processes. |
| Genre: | USGS Numbered Series |
| ProdID: | 19251 |
| Citation Author: | Harte, Philip T. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iv, 25 p. :ill. ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey ;
USGS Earth Science Information Center, Open-File Reports Section [distributor], |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 94-343 |
| Citation Search Results Text: | Comparison of vertical discretization techniques in finite-difference models of ground-water flow; example from a hypothetical New England setting; 1994; OFR; 94-343; Harte, Philip T. |
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| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | Comparison of vertical discretization techniques in finite-difference models of ground-water flow; example from a hypothetical New England setting; 1994; OFR; 94-343; Harte, Philip T. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1994/0343/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1994/0343/report.pdf |
| Date Other: | Mon, 1 May 1995 00:00 -0500 |
| Publisher: | U.S. Geological Survey ;
USGS Earth Science Information Center, Open-File Reports Section [distributor], |
