Does the incorporation of process conceptualisation and tracer data improve the structure and performance of a simple rainfall-runoff model in a mesoscale catchment?

Doerthe Tetzlaff, S. Uhlenbrook, S. Eppert, Christopher Soulsby

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A geomorphological instantaneous unit hydrograph (GIUH) rainfall-runoff model was applied in a 31 km(2) montane catchment in Scotland. Modelling was based on flow path length distributions derived from a digital terrain model (DTM). The model was applied in two ways; a single landscape unit response based on the DTM alone, and a two-landscape unit response, which incorporated the distribution of saturated areas derived from field-validated geographic information system (GIS) analysis based on a DTM and soil maps. This was to test the hypothesis that incorporation of process-information would enhance the model performance. The model was applied with limited multiple event calibration to produce parameter sets which could be applied to a spectrum of events with contrasting characteristics and antecedent conditions. Gran alkalinity was used as a tracer to provide an additional objective measure for assessing model performance. The models captured the hydrological response dynamics of the catchment reasonably well. In general, the single landscape unit approach produced the best individual model performance statistics, though the two-landscape unit approach provided a range of models, which bracketed the storm hydrograph response more realistically. There was a tendency to over-predict the rising limb of the hydrograph, underestimate large storm event peaks and anticipate the hydrograph recession too rapidly. Most of these limitations could be explained by the simplistic assumptions embedded within the GIUH approach. The modelling also gave feasible predictions of stream water chemistry, though these could not be used as a basis for model rejection. Nevertheless, the study suggested that the approach has potential for prediction of hydrological response in ungauged montane headwater basins. Copyright (c) 2007 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)2461-2474
Number of pages13
JournalHydrological Processes
Volume22
Issue number14
Early online date16 Nov 2007
DOIs
Publication statusPublished - 1 Jul 2008

Keywords

  • GIUH
  • tracers
  • catchment modelling
  • catchment hydrology
  • Scotland
  • mesoscale
  • ungauged catchments
  • geomorphological unit-hydrograph
  • different spatial scales
  • hydrological flow paths
  • digital elevation data
  • sub-Arctic catchment
  • salmon salmo-salar
  • Atlantic salmon
  • residence times
  • Mharcaidh catchment
  • information-system

Cite this

@article{013f498c3e334ce6a750640e97d21ff9,
title = "Does the incorporation of process conceptualisation and tracer data improve the structure and performance of a simple rainfall-runoff model in a mesoscale catchment?",
abstract = "A geomorphological instantaneous unit hydrograph (GIUH) rainfall-runoff model was applied in a 31 km(2) montane catchment in Scotland. Modelling was based on flow path length distributions derived from a digital terrain model (DTM). The model was applied in two ways; a single landscape unit response based on the DTM alone, and a two-landscape unit response, which incorporated the distribution of saturated areas derived from field-validated geographic information system (GIS) analysis based on a DTM and soil maps. This was to test the hypothesis that incorporation of process-information would enhance the model performance. The model was applied with limited multiple event calibration to produce parameter sets which could be applied to a spectrum of events with contrasting characteristics and antecedent conditions. Gran alkalinity was used as a tracer to provide an additional objective measure for assessing model performance. The models captured the hydrological response dynamics of the catchment reasonably well. In general, the single landscape unit approach produced the best individual model performance statistics, though the two-landscape unit approach provided a range of models, which bracketed the storm hydrograph response more realistically. There was a tendency to over-predict the rising limb of the hydrograph, underestimate large storm event peaks and anticipate the hydrograph recession too rapidly. Most of these limitations could be explained by the simplistic assumptions embedded within the GIUH approach. The modelling also gave feasible predictions of stream water chemistry, though these could not be used as a basis for model rejection. Nevertheless, the study suggested that the approach has potential for prediction of hydrological response in ungauged montane headwater basins. Copyright (c) 2007 John Wiley & Sons, Ltd.",
keywords = "GIUH, tracers, catchment modelling, catchment hydrology, Scotland, mesoscale, ungauged catchments, geomorphological unit-hydrograph, different spatial scales, hydrological flow paths, digital elevation data, sub-Arctic catchment, salmon salmo-salar, Atlantic salmon, residence times, Mharcaidh catchment, information-system",
author = "Doerthe Tetzlaff and S. Uhlenbrook and S. Eppert and Christopher Soulsby",
year = "2008",
month = "7",
day = "1",
doi = "10.1002/hyp.6841",
language = "English",
volume = "22",
pages = "2461--2474",
journal = "Hydrological Processes",
issn = "0885-6087",
publisher = "Wiley-Blackwell",
number = "14",

}

TY - JOUR

T1 - Does the incorporation of process conceptualisation and tracer data improve the structure and performance of a simple rainfall-runoff model in a mesoscale catchment?

AU - Tetzlaff, Doerthe

AU - Uhlenbrook, S.

AU - Eppert, S.

AU - Soulsby, Christopher

PY - 2008/7/1

Y1 - 2008/7/1

N2 - A geomorphological instantaneous unit hydrograph (GIUH) rainfall-runoff model was applied in a 31 km(2) montane catchment in Scotland. Modelling was based on flow path length distributions derived from a digital terrain model (DTM). The model was applied in two ways; a single landscape unit response based on the DTM alone, and a two-landscape unit response, which incorporated the distribution of saturated areas derived from field-validated geographic information system (GIS) analysis based on a DTM and soil maps. This was to test the hypothesis that incorporation of process-information would enhance the model performance. The model was applied with limited multiple event calibration to produce parameter sets which could be applied to a spectrum of events with contrasting characteristics and antecedent conditions. Gran alkalinity was used as a tracer to provide an additional objective measure for assessing model performance. The models captured the hydrological response dynamics of the catchment reasonably well. In general, the single landscape unit approach produced the best individual model performance statistics, though the two-landscape unit approach provided a range of models, which bracketed the storm hydrograph response more realistically. There was a tendency to over-predict the rising limb of the hydrograph, underestimate large storm event peaks and anticipate the hydrograph recession too rapidly. Most of these limitations could be explained by the simplistic assumptions embedded within the GIUH approach. The modelling also gave feasible predictions of stream water chemistry, though these could not be used as a basis for model rejection. Nevertheless, the study suggested that the approach has potential for prediction of hydrological response in ungauged montane headwater basins. Copyright (c) 2007 John Wiley & Sons, Ltd.

AB - A geomorphological instantaneous unit hydrograph (GIUH) rainfall-runoff model was applied in a 31 km(2) montane catchment in Scotland. Modelling was based on flow path length distributions derived from a digital terrain model (DTM). The model was applied in two ways; a single landscape unit response based on the DTM alone, and a two-landscape unit response, which incorporated the distribution of saturated areas derived from field-validated geographic information system (GIS) analysis based on a DTM and soil maps. This was to test the hypothesis that incorporation of process-information would enhance the model performance. The model was applied with limited multiple event calibration to produce parameter sets which could be applied to a spectrum of events with contrasting characteristics and antecedent conditions. Gran alkalinity was used as a tracer to provide an additional objective measure for assessing model performance. The models captured the hydrological response dynamics of the catchment reasonably well. In general, the single landscape unit approach produced the best individual model performance statistics, though the two-landscape unit approach provided a range of models, which bracketed the storm hydrograph response more realistically. There was a tendency to over-predict the rising limb of the hydrograph, underestimate large storm event peaks and anticipate the hydrograph recession too rapidly. Most of these limitations could be explained by the simplistic assumptions embedded within the GIUH approach. The modelling also gave feasible predictions of stream water chemistry, though these could not be used as a basis for model rejection. Nevertheless, the study suggested that the approach has potential for prediction of hydrological response in ungauged montane headwater basins. Copyright (c) 2007 John Wiley & Sons, Ltd.

KW - GIUH

KW - tracers

KW - catchment modelling

KW - catchment hydrology

KW - Scotland

KW - mesoscale

KW - ungauged catchments

KW - geomorphological unit-hydrograph

KW - different spatial scales

KW - hydrological flow paths

KW - digital elevation data

KW - sub-Arctic catchment

KW - salmon salmo-salar

KW - Atlantic salmon

KW - residence times

KW - Mharcaidh catchment

KW - information-system

U2 - 10.1002/hyp.6841

DO - 10.1002/hyp.6841

M3 - Article

VL - 22

SP - 2461

EP - 2474

JO - Hydrological Processes

JF - Hydrological Processes

SN - 0885-6087

IS - 14

ER -