Technical Note: Reducing the spin-up time of integrated surface water–groundwater models

Handle URI:
http://hdl.handle.net/10754/346781
Title:
Technical Note: Reducing the spin-up time of integrated surface water–groundwater models
Authors:
Ajami, H.; Evans, J. P. ( 0000-0003-1776-3429 ) ; McCabe, Matthew ( 0000-0002-1279-5272 ) ; Stisen, S.
Abstract:
One of the main challenges in the application of coupled or integrated hydrologic models is specifying a catchment's initial conditions in terms of soil moisture and depth-to-water table (DTWT) distributions. One approach to reducing uncertainty in model initialization is to run the model recursively using either a single year or multiple years of forcing data until the system equilibrates with respect to state and diagnostic variables. However, such "spin-up" approaches often require many years of simulations, making them computationally intensive. In this study, a new hybrid approach was developed to reduce the computational burden of the spin-up procedure by using a combination of model simulations and an empirical DTWT function. The methodology is examined across two distinct catchments located in a temperate region of Denmark and a semi-arid region of Australia. Our results illustrate that the hybrid approach reduced the spin-up period required for an integrated groundwater–surface water–land surface model (ParFlow.CLM) by up to 50%. To generalize results to different climate and catchment conditions, we outline a methodology that is applicable to other coupled or integrated modeling frameworks when initialization from an equilibrium state is required.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Technical Note: Reducing the spin-up time of integrated surface water–groundwater models 2014, 18 (12):5169 Hydrology and Earth System Sciences
Publisher:
Copernicus GmbH
Journal:
Hydrology and Earth System Sciences
Issue Date:
12-Dec-2014
DOI:
10.5194/hess-18-5169-2014
Type:
Article
ISSN:
1607-7938
Additional Links:
http://www.hydrol-earth-syst-sci.net/18/5169/2014/
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAjami, H.en
dc.contributor.authorEvans, J. P.en
dc.contributor.authorMcCabe, Matthewen
dc.contributor.authorStisen, S.en
dc.date.accessioned2015-03-17T13:50:19Zen
dc.date.available2015-03-17T13:50:19Zen
dc.date.issued2014-12-12en
dc.identifier.citationTechnical Note: Reducing the spin-up time of integrated surface water–groundwater models 2014, 18 (12):5169 Hydrology and Earth System Sciencesen
dc.identifier.issn1607-7938en
dc.identifier.doi10.5194/hess-18-5169-2014en
dc.identifier.urihttp://hdl.handle.net/10754/346781en
dc.description.abstractOne of the main challenges in the application of coupled or integrated hydrologic models is specifying a catchment's initial conditions in terms of soil moisture and depth-to-water table (DTWT) distributions. One approach to reducing uncertainty in model initialization is to run the model recursively using either a single year or multiple years of forcing data until the system equilibrates with respect to state and diagnostic variables. However, such "spin-up" approaches often require many years of simulations, making them computationally intensive. In this study, a new hybrid approach was developed to reduce the computational burden of the spin-up procedure by using a combination of model simulations and an empirical DTWT function. The methodology is examined across two distinct catchments located in a temperate region of Denmark and a semi-arid region of Australia. Our results illustrate that the hybrid approach reduced the spin-up period required for an integrated groundwater–surface water–land surface model (ParFlow.CLM) by up to 50%. To generalize results to different climate and catchment conditions, we outline a methodology that is applicable to other coupled or integrated modeling frameworks when initialization from an equilibrium state is required.en
dc.publisherCopernicus GmbHen
dc.relation.urlhttp://www.hydrol-earth-syst-sci.net/18/5169/2014/en
dc.rightsThis work is distributed under the Creative Commons Attribution 3.0 License.en
dc.titleTechnical Note: Reducing the spin-up time of integrated surface water–groundwater modelsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalHydrology and Earth System Sciencesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Civil and Environmental Engineering, University of New South Wales, Sydney, Australiaen
dc.contributor.institutionConnected Waters Initiative Research Centre, University of New South Wales, Sydney, Australiaen
dc.contributor.institutionClimate Change Research Centre, University of New South Wales, Sydney, Australiaen
dc.contributor.institutionARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, Australiaen
dc.contributor.institutionGeological Survey of Denmark and Greenland, Copenhagen, Denmarken
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMcCabe, Matthewen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.