Novel evaporation experiment to determine soil hydraulic properties
A novel experimental approach to determine soil hydraulic material properties for the dry and very dry range is presented. Evaporation from the surface of a soil column is controlled by a constant flux of preconditioned air and the resulting vapour flux is measured by infrared absorption spectroscop...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2006-01-01
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| Series: | Hydrology and Earth System Sciences |
| Online Access: | http://www.hydrol-earth-syst-sci.net/10/817/2006/hess-10-817-2006.pdf |
| _version_ | 1818498064537616384 |
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| author | K. Schneider O. Ippisch O. Ippisch K. Roth |
| author_facet | K. Schneider O. Ippisch O. Ippisch K. Roth |
| author_sort | K. Schneider |
| collection | DOAJ |
| description | A novel experimental approach to determine soil hydraulic material properties for the dry and very dry range is presented. Evaporation from the surface of a soil column is controlled by a constant flux of preconditioned air and the resulting vapour flux is measured by infrared absorption spectroscopy. The data are inverted under the assumptions that (i) the simultaneous movement of water in the liquid and vapour is represented by Richards' equation with an effective hydraulic conductivity and that (ii) the coupling between the soil and the well-mixed atmosphere can be modelled by a boundary layer with a constant transfer resistance. The optimised model fits the data exceptionally well. Remaining deviations during the initial phase of an experiment are thought to be well-understood and are attributed to the onset of the heat flow through the column which compensates the latent heat of evaporation. |
| first_indexed | 2024-12-10T18:53:15Z |
| format | Article |
| id | doaj.art-13bc899949994c4ea4ad0d037a2fb544 |
| institution | Directory Open Access Journal |
| issn | 1027-5606 1607-7938 |
| language | English |
| last_indexed | 2024-12-10T18:53:15Z |
| publishDate | 2006-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj.art-13bc899949994c4ea4ad0d037a2fb5442022-12-22T01:37:14ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382006-01-01106817827Novel evaporation experiment to determine soil hydraulic propertiesK. SchneiderO. IppischO. IppischK. RothA novel experimental approach to determine soil hydraulic material properties for the dry and very dry range is presented. Evaporation from the surface of a soil column is controlled by a constant flux of preconditioned air and the resulting vapour flux is measured by infrared absorption spectroscopy. The data are inverted under the assumptions that (i) the simultaneous movement of water in the liquid and vapour is represented by Richards' equation with an effective hydraulic conductivity and that (ii) the coupling between the soil and the well-mixed atmosphere can be modelled by a boundary layer with a constant transfer resistance. The optimised model fits the data exceptionally well. Remaining deviations during the initial phase of an experiment are thought to be well-understood and are attributed to the onset of the heat flow through the column which compensates the latent heat of evaporation.http://www.hydrol-earth-syst-sci.net/10/817/2006/hess-10-817-2006.pdf |
| spellingShingle | K. Schneider O. Ippisch O. Ippisch K. Roth Novel evaporation experiment to determine soil hydraulic properties Hydrology and Earth System Sciences |
| title | Novel evaporation experiment to determine soil hydraulic properties |
| title_full | Novel evaporation experiment to determine soil hydraulic properties |
| title_fullStr | Novel evaporation experiment to determine soil hydraulic properties |
| title_full_unstemmed | Novel evaporation experiment to determine soil hydraulic properties |
| title_short | Novel evaporation experiment to determine soil hydraulic properties |
| title_sort | novel evaporation experiment to determine soil hydraulic properties |
| url | http://www.hydrol-earth-syst-sci.net/10/817/2006/hess-10-817-2006.pdf |
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