Lancaster EPrints

Including spatially variable soil depths in TOPMODEL.

Saulnier, Georges-Marie and Beven, Keith J. and Obled, Charles (1998) Including spatially variable soil depths in TOPMODEL. Journal of Hydrology, 202 (1-4). pp. 158-172.

Full text not available from this repository.

Abstract

TOPMODEL (Beven and Kirkby, 1979; Beven et al., 1995) was one of the first attempts to model distributed hydrological responses based on variable contributing area concepts. It makes use of an index of hydrological similarity based on an analysis of the topographic data. The index approach was later generalised to take account of spatial variability of soil transmissivities, but no similar spatial analysis of the variability in the rate of the decrease of the transmissivity with depth has yet been examined. This paper shows how the TOPMODEL theory can be extended to handle this spatial variability, using a 2D distribution function of a new soil depth-topographic index of hydrological similarity. A first sensitivity analysis of the effect of variable soil depths on the model predictions for the Maurets catchment, France, is presented. Predicted discharges and calibrated parameter values are not sensitive to the patterns of effective soil depth investigated. Distributed predictions may be more sensitive but raise questions of how to obtain the parameter data required.

Item Type: Article
Journal or Publication Title: Journal of Hydrology
Uncontrolled Keywords: TOPMODEL ; DTM ; Hydraulic conductivity ; Soil depth ; Rainfall-runoff modelling
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21865
Deposited By: ep_ss_importer
Deposited On: 10 Feb 2009 14:15
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:52
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21865

Actions (login required)

View Item