Change search
ReferencesLink to record
Permanent link

Direct link
Rainfall-runoff model application in ungauged catchments in Scotland
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Användning av en avrinningsmodell i ett skotskt avrinningsområde utan vattenföringsmätningar (Swedish)
Abstract [en]

The conceptual rainfall-runoff model Hysim is used to estimate the flow in ungauged catchments in Scotland by Scottish Water. However, there are non-quantified uncertainties associated with the outcomes of the modelling strategy used. In order to identify and quantify these uncertainties it was necessary to use the framework of proxy-basin validation in order to evaluate the performance of different modelling strategies.   The proxy-basin validation test requires hydrologically analogous catchments for the evaluation of models, a Region Of Influence regionalisation method was used in order group selected catchments by Q95(%MF). Four groups of four catchments were established, which covered Q95(%MF) 5-7%, 7-9%, 9-11% and 11-13%.   The allocation of “donor catchment” and “target catchment” for each Q95(%MF) group was accomplished through discussion with Scottish Water with respect to existing Scottish Water modelled catchments. A single donor catchment and three target catchments were therefore indicated for each group.   Two modelling strategies were developed by the study; the first full transposition method used the entire optimised parameter-set from the donor catchment with the exception of the target catchment’s “catchment area” parameter. The second partial transposition method used the entire optimal parameter-set with the exception of the target catchment’s “interception storage”, “time to peak”, “rooting depth” and “catchment area” parameters.    It was found that the full transposition method had the least uncertainty associated its use for flow estimation when the parameter-set was derived from a donor catchment calibration that was excellent. Contrarily, it was found that the partial transposition model method had the least uncertainty associated with flow estimation for parameter-sets that were derived from a relatively poor donor catchment calibration.   Encouraged by this testing framework, this study has suggested the use of catalogue of donor parameter-sets that can be used to estimate flow for catchments that are hydrologically similar. This strategy of hydrological modelling has been recommended to improve existing Scottish Water Hysim methodology.

Place, publisher, year, edition, pages
2011. , 71 p.
Examensarbete vid Institutionen för geovetenskaper, ISSN 1650-6553 ; 228
Keyword [en]
ungauged catchment, proxy-basin validation, region of interest, transposition method, hysim, rainfall-runoff model, sepa, scottish water, scotland
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:uu:diva-162181OAI: diva2:459228
Educational program
Master Programme in Earth Science
2011-09-16, Geocentrum, 00:00
Life Earth Science
Available from: 2012-10-31 Created: 2011-11-25 Last updated: 2012-10-31Bibliographically approved

Open Access in DiVA

fulltext(2316 kB)1922 downloads
File information
File name FULLTEXT01.pdfFile size 2316 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar
Total: 1922 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 252 hits
ReferencesLink to record
Permanent link

Direct link