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A Physically-Based Model of Heterogeneous Hillslopes II. Effective Hydraulic Conductivities.

Binley, Andrew M. and Beven, Keith J. and Elgy, John (1989) A Physically-Based Model of Heterogeneous Hillslopes II. Effective Hydraulic Conductivities. Water Resources Research, 25 (6). pp. 1227-1233. ISSN 0043-1397

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Abstract

Using the results of a fully three-dimensional model of variably saturated flow on a heterogeneous hillslope, the concept of equivalent homogeneous hillslopes is explored. By considering single realizations of random patterns of saturated hydraulic conductivity, attempts are made to determine single effective hydraulic conductivity values capable of reproducing both subsurface and surface flow hydrographs. For the case of high-permeability soils, effective parameters were found to reasonably reproduce the hillslope hydrograph, although there was no consistent relationship between the effective values and the moments of the spatial distributions. For the case of low-permeability soils, characterized by surface flow domination of the runoff hydrograph, single effective parameters were not found to be capable of reproducing both subsurface and surface flow responses. Furthermore, the event dependency of effective conductivity values under such conditions was demonstrated.

Item Type: Article
Journal or Publication Title: Water Resources Research
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 26286
Deposited By: Prof Andrew Binley
Deposited On: 28 Apr 2009 13:47
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:31
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/26286

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