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On constraining the predictions of a distributed model: The incorporation of fuzzy estimates of saturated areas into the calibration process

Citation

Franks, SW and Gineste, P and Beven, KJ and Merot, P, On constraining the predictions of a distributed model: The incorporation of fuzzy estimates of saturated areas into the calibration process, Water Resources Research, 34, (4) pp. 787-797. ISSN 1944-7973 (1998) [Refereed Article]

Copyright Statement

Copyright 1998 American Geophysical Union

DOI: doi:10.1029/97WR03041

Abstract

Distributed hydrological models are generally overparameterized, resulting in the possibility of multiple parameterizations from many areas of the parameter space, providing acceptable fits to observed data. In this study, TOPMODEL parameterizations are conditioned on discharges, and then further conditioned on estimates of saturated areas derived from ERS-1 synthetic aperture radar (SAR) images combined with the In (a/tan beta) topographic index, and compared to ground truth saturation measurements made in one small subcatchment. The uncertainty associated with the catchment-wide predictions of saturated area is explicitly incorporated into the conditioning through the weighting of estimates within a fuzzy set framework. The predictive uncertainty associated with the parameterizations is then assessed using the generalized likelihood uncertainty estimation (GLUE) methodology. It is shown that despite the uncertainty in the predictions of saturated area the methodology can reject many previously acceptable parameterizations with the consequence of a marked reduction in the acceptable range of a catchment average transmissivity parameter and of improved predictions of some discharge events.

Item Details

Item Type:Refereed Article
Keywords:uncertainty modelling GLUE microwave remote sensing
Research Division:Engineering
Research Group:Environmental Engineering
Research Field:Environmental Engineering Modelling
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Land and Water Management of environments not elsewhere classified
Author:Franks, SW (Professor Stewart Franks)
ID Code:86408
Year Published:1998
Web of Science® Times Cited:167
Deposited By:Engineering
Deposited On:2013-09-14
Last Modified:2013-10-16
Downloads:0

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