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Using internal catchment information to reduce the uncertainty of discharge and baseflow prediction

Gallart, Francesc and Latron, Jérôme and Llorens, Pilar and Beven, Keith J. (2007) Using internal catchment information to reduce the uncertainty of discharge and baseflow prediction. Advances in Water Resources, 30 (4). pp. 808-823.

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Abstract

The semi-distributed hydrological model TOPMODEL was tested with data from the Can Vila research basin (Vallcebre) in order to verify its adequacy for simulating runoff and the relative contributions from saturated overland flow and groundwater flow. After a test of the overall performance of the model, only data from a wet period were selected for this work. The test was performed using the GLUE method. The model was conditioned on continuous discharge and water table records. Furthermore, point measurements of recession flow simultaneous with water table depth and the extent of saturated areas were used to condition the distributions of the more relevant parameters, using new or updated evaluation measures. A wide range of parameter sets provided acceptable results for flow simulation when the model was conditioned on flow data alone, and the uncertainty of prediction of the contribution from groundwater was extremely large. However, conditioning on water table records and the distribution of parameters obtained from point observations strongly reduced the uncertainty of predictions for both stream flow and groundwater contribution.

Item Type: Article
Journal or Publication Title: Advances in Water Resources
Uncontrolled Keywords: TOPMODEL ; GLUE ; Hydrograph separation ; Uncertainty analysis ; Overland flow ; Subsurface flow ; Water table ; Saturated areas
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 27344
Deposited By: Mr Richard Ingham
Deposited On: 19 Oct 2009 12:00
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:41
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/27344

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