Quinn, P. F. and Ostendorf, B. and Beven, Keith J. and Tenhunen, J. (1998) Spatial and temporal predictions of soil moisture patterns and evaporative losses using TOPMODEL and the GAS-Flux model for an Alaskan catchment. Hydrology and Earth System Sciences, 2 (1). pp. 51-64. ISSN 1027-5606
Full text not available from this repository.Abstract
By using topographic indices as derived from a Digital Terrain Models (DTM), it is possible to represent the heterogeneity within a landscape. This heterogeneity can reflect both long term evolutionary patterns seen in a landscape and the short term forcing of flow dynamics during storm events. By spatial analysis, the linkage between the geomorphological- hydrological-plant physiological phenomena can be examined. In this study, a direct link will be established between the topographically-driven hydrological phenomena and the eco-physiological response. The topographic distribution function of TOPMODEL is used to control the spatial and temporal flux of the channel flow and water table. The plant physiological model GAS-FLUX is used to give a spatially and temporally dissaggregated species-sensitive estimate of evapotranspiration flux. Evapotranspiration is sensitive to the vegetation phonology, to tundra community physiology and to the temperature regime. A simple linking of TOPMODEL and the GAS-FLUX model is applied to a summer snow-free period to the Imnavait catchment, Alaska (2.2 km2). A species-sensitive evapotranspiration model proved to give the highest quality results when validated against flow observations. Predicted dynamics of variable source area and the component hydrological processes are illustrated.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Hydrology and Earth System Sciences |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre |
| ID Code: | 21861 |
| Deposited By: | ep_ss_importer |
| Deposited On: | 10 Feb 2009 14:34 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 15:52 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/21861 |
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