Towards minimal calibration of process-based rainfall runoff models in mountainous watersheds

integrating tracer data into geomorphic instantaneous unit hydrographs

Doerthe Tetzlaff, Stefan Uhlenbrook, Stefan Eppert, Christopher Soulsby

Research output: Contribution to journalArticle

Abstract

The Geomorphological Instantaneous Unit Hydrograph (GIUH) approach was applied for rainfall-runoff modelling in a 31 km2 montane catchment in the Scottish Highlands. Modelling was based on flow path length distributions derived from a Digital Terrain Model (DTM). The model was applied using a single landscape unit response based on the DTM, and a two-landscape unit response, which included saturated areas. This was to examine whether process information would enhance the model performance. The model was applied with limited calibration to produce parameter sets, which could be applied to a spectrum of contrasting events. Alkalinity was used as a conservative tracer to provide an additional objective measure ("soft" data) of model performance. The models captured the hydrological response of the catchment reasonably well and facilitated feasible predictions of alkalinity. The single landscape unit approach produced the best individual model performance statistics, probably because of limitations embedded within the GIUH approach. Nevertheless, the study suggested that GIUHs have considerable potential for prediction of hydrological response in ungauged montane basins.
Original languageEnglish
Pages (from-to)49-55
Number of pages7
JournalIAHS-AISH Publication
Volume326
Publication statusPublished - Mar 2009

Fingerprint

unit hydrograph
tracer
watershed
runoff
calibration
rainfall
hydrological response
digital terrain model
alkalinity
catchment
rainfall-runoff modeling
prediction
basin
modeling

Keywords

  • GIUH
  • tracers
  • modelling
  • hydrology
  • mesoscale
  • ungauged catchments

Cite this

@article{26620d0f46d5486c83a3f288a7b12a85,
title = "Towards minimal calibration of process-based rainfall runoff models in mountainous watersheds: integrating tracer data into geomorphic instantaneous unit hydrographs",
abstract = "The Geomorphological Instantaneous Unit Hydrograph (GIUH) approach was applied for rainfall-runoff modelling in a 31 km2 montane catchment in the Scottish Highlands. Modelling was based on flow path length distributions derived from a Digital Terrain Model (DTM). The model was applied using a single landscape unit response based on the DTM, and a two-landscape unit response, which included saturated areas. This was to examine whether process information would enhance the model performance. The model was applied with limited calibration to produce parameter sets, which could be applied to a spectrum of contrasting events. Alkalinity was used as a conservative tracer to provide an additional objective measure ({"}soft{"} data) of model performance. The models captured the hydrological response of the catchment reasonably well and facilitated feasible predictions of alkalinity. The single landscape unit approach produced the best individual model performance statistics, probably because of limitations embedded within the GIUH approach. Nevertheless, the study suggested that GIUHs have considerable potential for prediction of hydrological response in ungauged montane basins.",
keywords = "GIUH, tracers, modelling, hydrology, mesoscale, ungauged catchments",
author = "Doerthe Tetzlaff and Stefan Uhlenbrook and Stefan Eppert and Christopher Soulsby",
note = "Hydrology in mountain regions: observations, processes and dynamics 2009 978-1-901502-89-3",
year = "2009",
month = "3",
language = "English",
volume = "326",
pages = "49--55",
journal = "IAHS-AISH Publication",
issn = "0144-7815",

}

TY - JOUR

T1 - Towards minimal calibration of process-based rainfall runoff models in mountainous watersheds

T2 - integrating tracer data into geomorphic instantaneous unit hydrographs

AU - Tetzlaff, Doerthe

AU - Uhlenbrook, Stefan

AU - Eppert, Stefan

AU - Soulsby, Christopher

N1 - Hydrology in mountain regions: observations, processes and dynamics 2009 978-1-901502-89-3

PY - 2009/3

Y1 - 2009/3

N2 - The Geomorphological Instantaneous Unit Hydrograph (GIUH) approach was applied for rainfall-runoff modelling in a 31 km2 montane catchment in the Scottish Highlands. Modelling was based on flow path length distributions derived from a Digital Terrain Model (DTM). The model was applied using a single landscape unit response based on the DTM, and a two-landscape unit response, which included saturated areas. This was to examine whether process information would enhance the model performance. The model was applied with limited calibration to produce parameter sets, which could be applied to a spectrum of contrasting events. Alkalinity was used as a conservative tracer to provide an additional objective measure ("soft" data) of model performance. The models captured the hydrological response of the catchment reasonably well and facilitated feasible predictions of alkalinity. The single landscape unit approach produced the best individual model performance statistics, probably because of limitations embedded within the GIUH approach. Nevertheless, the study suggested that GIUHs have considerable potential for prediction of hydrological response in ungauged montane basins.

AB - The Geomorphological Instantaneous Unit Hydrograph (GIUH) approach was applied for rainfall-runoff modelling in a 31 km2 montane catchment in the Scottish Highlands. Modelling was based on flow path length distributions derived from a Digital Terrain Model (DTM). The model was applied using a single landscape unit response based on the DTM, and a two-landscape unit response, which included saturated areas. This was to examine whether process information would enhance the model performance. The model was applied with limited calibration to produce parameter sets, which could be applied to a spectrum of contrasting events. Alkalinity was used as a conservative tracer to provide an additional objective measure ("soft" data) of model performance. The models captured the hydrological response of the catchment reasonably well and facilitated feasible predictions of alkalinity. The single landscape unit approach produced the best individual model performance statistics, probably because of limitations embedded within the GIUH approach. Nevertheless, the study suggested that GIUHs have considerable potential for prediction of hydrological response in ungauged montane basins.

KW - GIUH

KW - tracers

KW - modelling

KW - hydrology

KW - mesoscale

KW - ungauged catchments

M3 - Article

VL - 326

SP - 49

EP - 55

JO - IAHS-AISH Publication

JF - IAHS-AISH Publication

SN - 0144-7815

ER -