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Analytical compensation between DTM grid resolution and effective values of saturated hydraulic conductivity within the TOPMODEL framework.

Saulnier, Georges-Marie and Obled, Charles and Beven, Keith J. (1997) Analytical compensation between DTM grid resolution and effective values of saturated hydraulic conductivity within the TOPMODEL framework. Hydrological Processes, 11 (9). pp. 1331-1346. ISSN 0885-6087

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Abstract

The recent widespread availability of digital terrain data has resulted in increasing use, in a variety of hydrological models, of different degrees of complexity. Previous experience suggests that neither model results nor effective parameter values are independent of the resolution of the digital terrain data used. Calibration of parameter values can compensate for lack of resolution in the digital terrain data. This paper will show, for one particular model, TOPMODEL, how an analytical link can be established between the grid size of a raster digital terrain model and the effective saturated hydraulic conductivity value used in the model. The work generalizes the results of the recent study by Franchini et al. (1996) and allows the change in effective conductivity to be estimated on the basis of keeping a realistic simulation of saturated contributing areas as the DTM grid size changes.

Item Type: Article
Journal or Publication Title: Hydrological Processes
Uncontrolled Keywords: TOPMODEL • DTM • digital terrain analysis • rainfall-runoff modelling • hydraulic conductivity
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21952
Deposited By: ep_ss_importer
Deposited On: 16 Feb 2009 14:04
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:54
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21952

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