| Abstract: | A solution in Laplace transform space is obtained for transport of resident concentration in an imperfectly but yet highly stratified porous medium. From this transform-space solution either temporal moments can be derived by taking derivatives with respect to the Laplace parameter, or the transform-space solution can be inverted numerically to obtain breakthrough curves for the mean concentration. When compared to an equivalent solution with a Fickian dispersive flux, these temporal moments indicate the extent to which transport in heterogeneous porous media deviates from classifical Fickian behaviour. The numerical inversion of the Laplace transform solution gives partial breakthrough curves for the mean concentration which have the appearance of conflicting with the derived moment information. A hypothesis is put forth which resolves this apparent conflict; this hypothesis is verified by adding a component of local dispersion to the governing transport equation. -from Author |
| Genre: | Article |
| ProdID: | 70016683 |
| Citation Author: | Naff, R. L. |
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| Citation End Page: | 68 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Water Resources Research |
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| Citation Number Of Pages: | 16 |
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| Citation Search Results Text: | Arrival times and temporal moments of breakthrough curves for an imperfectly stratified aquifer; 1992; Article; Journal; Water Resources Research; Naff, R. L. |
| Citation Start Page: | 53 |
| Citation Volume: | 28 |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Arrival times and temporal moments of breakthrough curves for an imperfectly stratified aquifer; 1992; Article; Journal; Water Resources Research; Naff, R. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1029/91WR02105 |
| Date Other: | Wed, 1 Jan 1992 00:00 -0600 |
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