| Abstract: | This paper demonstrates that analytic element models have potential as powerful screening tools that can facilitate or improve calibration of more complicated finite-difference and finite-element models. We demonstrate how a two-dimensional analytic element model was used to identify errors in a complex three-dimensional finite-difference model caused by incorrect specification of boundary conditions. An improved finite-difference model was developed using boundary conditions developed from a far-field analytic element model. Calibration of a revised finite-difference model was achieved using fewer zones of hydraulic conductivity and lake bed conductance than the original finite-difference model. Calibration statistics were also improved in that simulated base-flows were much closer to measured values. The improved calibration is due mainly to improved specification of the boundary conditions made possible by first solving the far-field problem with an analytic element model.This paper demonstrates that analytic element models have potential as powerful screening tools that can facilitate or improve calibration of more complicated finite-difference and finite-element models. We demonstrate how a two-dimensional analytic element model was used to identify errors in a complex three-dimensional finite-difference model caused by incorrect specification of boundary conditions. An improved finite-difference model was developed using boundary conditions developed from a far-field analytic element model. Calibration of a revised finite-difference model was achieved using fewer zones of hydraulic conductivity and lake bed conductance than the original finite-difference model. Calibration statistics were also improved in that simulated base-flows were much closer to measured values. The improved calibration is due mainly to improved specification of the boundary conditions made possible by first solving the far-field problem with an analytic element model. |
| Genre: | Article |
| ProdID: | 70020574 |
| Citation Author: | Hunt, R. J.; Anderson, M. P.; Kelson, V. A. |
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| Citation End Page: | 1017 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ground Water |
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| Citation Number Of Pages: | 7 |
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| Citation Publisher: | Ground Water Publ Co |
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| Citation Search Results Text: | Improving a complex finite-difference ground water flow model through the use of an analytic element screening model; 1998; Article; Journal; Ground Water; Hunt, R. J.; Anderson, M. P.; Kelson, V. A. |
| Citation Start Page: | 1011 |
| Citation Volume: | 36 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Improving a complex finite-difference ground water flow model through the use of an analytic element screening model; 1998; Article; Journal; Ground Water; Hunt, R. J.; Anderson, M. P.; Kelson, V. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
| Publisher: | Ground Water Publ Co |
