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Detecting the effects of spatial variability of rainfall on hydrological modelling within an uncertainty analysis framework
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2009 (English)In: Hydrological Processes, ISSN 0885-6087, E-ISSN 1099-1085, Vol. 23, no 14, 1988-2003 p.Article in journal (Refereed) Published
Abstract [en]

Spatial patterns of rainfall are known to cause differences in observed flow. In this paper, the effects of perturbations in rainfall patterns on changes in parameter sets as well as model output are explored using the hydrological model Dynamic TOPMODEL for the Brue catchment (135 kin 2) in southwest England. Overall rainfall amount remains the same at each time step so the perturbations act Lis effectively treated errors in the spatial pattern. The errors were analysed with particular emphasis on when they could be detected under an uncertainty framework. Higher rainfall Perturbations (multipliers of x4 and greater) in the low lying and high areas of the catchment resulted in changes to event peaks and accompanying compensation in the baseflow. More significantly, changes in the effective model parameter values required by the best models to take account of the more extreme patterns were able to be detected by noting when distributions of parameters change under uncertainty. Copyright (C) 2009 John Wiley & Sons, Ltd.

Place, publisher, year, edition, pages
2009. Vol. 23, no 14, 1988-2003 p.
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:uu:diva-120829DOI: 10.1002/hyp.7341OAI: oai:DiVA.org:uu-120829DiVA: diva2:304322
Note
K Bevan har adress Catchment and Aquatic Processes, Lancaster Environment Centre, Lancaster University på artikelnAvailable from: 2010-03-17 Created: 2010-03-16 Last updated: 2017-12-12Bibliographically approved

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