| Abstract: | Analytically-derived sensitivities are presented for parameters in one-dimensional models of solute transport in porous media. Sensitivities were derived by direct differentiation of closed form solutions for each of the odel, and by a time integral method for two of the models. Models are based on the advection-dispersion equation and include adsorption and first-order chemical decay. Boundary conditions considered are: a constant step input of solute, constant flux input of solute, and exponentially decaying input of solute at the upstream boundary. A zero flux is assumed at the downstream boundary. Initial conditions include a constant and spatially varying distribution of solute. One model simulates the mixing of solute in an observation well from individual layers in a multilayer aquifer system. Computer programs produce output files compatible with graphics software in which sensitivities are plotted as a function of either time or space. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 14508 |
| Citation Author: | Knopman, D. S. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 97 p. ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 86-605 |
| Citation Search Results Text: | Analytically-derived sensitivities in one-dimensional models of solute transport in porous media; 1987; OFR; 86-605; Knopman, D. S. |
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| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Analytically-derived sensitivities in one-dimensional models of solute transport in porous media; 1987; OFR; 86-605; Knopman, D. S. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1986/0605/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1986/0605/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
