Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America

A satisfactory performance of hydrological models under historical climate conditions is considered a prerequisite step in any hydrological climate change impact study. Despite the significant interest in global hydrological modeling, few systematic evaluations of global hydrological models (gHMs) a...

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Autores principales:	Magali Troin, Richard Arsenault, Elyse Fournier, François Brissette
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	global hydrological modeling regional hydrological modeling multi-model intercomparison study catchment-scale assessment North America Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/885153ec3db848d384e05951cbb27b43
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spelling	oai:doaj.org-article:885153ec3db848d384e05951cbb27b432021-11-11T19:57:38ZCatchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America10.3390/w132131122073-4441https://doaj.org/article/885153ec3db848d384e05951cbb27b432021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3112https://doaj.org/toc/2073-4441A satisfactory performance of hydrological models under historical climate conditions is considered a prerequisite step in any hydrological climate change impact study. Despite the significant interest in global hydrological modeling, few systematic evaluations of global hydrological models (gHMs) at the catchment scale have been carried out. This study investigates the performance of 4 gHMs driven by 4 global observation-based meteorological inputs at simulating weekly discharges over 198 large-sized North American catchments for the 1971–2010 period. The 16 discharge simulations serve as the basis for evaluating gHM accuracy at the catchment scale within the second phase of the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP2a). The simulated discharges by the four gHMs are compared against observed and simulated weekly discharge values by two regional hydrological models (rHMs) driven by a global meteorological dataset for the same period. We discuss the implications of both modeling approaches as well as the influence of catchment characteristics and global meteorological forcing in terms of model performance through statistical criteria and visual hydrograph comparison for catchment-scale hydrological studies. Overall, the gHM discharge statistics exhibit poor agreement with observations at the catchment scale and manifest considerable bias and errors in seasonal flow simulations. We confirm that the gHM approach, as experimentally implemented through the ISIMIP2a, must be used with caution for regional studies. We find the rHM approach to be more trustworthy and recommend using it for hydrological studies, especially if findings are intended to support operational decision-making.Magali TroinRichard ArsenaultElyse FournierFrançois BrissetteMDPI AGarticleglobal hydrological modelingregional hydrological modelingmulti-modelintercomparison studycatchment-scale assessmentNorth AmericaHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3112, p 3112 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	global hydrological modeling regional hydrological modeling multi-model intercomparison study catchment-scale assessment North America Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	global hydrological modeling regional hydrological modeling multi-model intercomparison study catchment-scale assessment North America Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Magali Troin Richard Arsenault Elyse Fournier François Brissette Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
description	A satisfactory performance of hydrological models under historical climate conditions is considered a prerequisite step in any hydrological climate change impact study. Despite the significant interest in global hydrological modeling, few systematic evaluations of global hydrological models (gHMs) at the catchment scale have been carried out. This study investigates the performance of 4 gHMs driven by 4 global observation-based meteorological inputs at simulating weekly discharges over 198 large-sized North American catchments for the 1971–2010 period. The 16 discharge simulations serve as the basis for evaluating gHM accuracy at the catchment scale within the second phase of the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP2a). The simulated discharges by the four gHMs are compared against observed and simulated weekly discharge values by two regional hydrological models (rHMs) driven by a global meteorological dataset for the same period. We discuss the implications of both modeling approaches as well as the influence of catchment characteristics and global meteorological forcing in terms of model performance through statistical criteria and visual hydrograph comparison for catchment-scale hydrological studies. Overall, the gHM discharge statistics exhibit poor agreement with observations at the catchment scale and manifest considerable bias and errors in seasonal flow simulations. We confirm that the gHM approach, as experimentally implemented through the ISIMIP2a, must be used with caution for regional studies. We find the rHM approach to be more trustworthy and recommend using it for hydrological studies, especially if findings are intended to support operational decision-making.
format	article
author	Magali Troin Richard Arsenault Elyse Fournier François Brissette
author_facet	Magali Troin Richard Arsenault Elyse Fournier François Brissette
author_sort	Magali Troin
title	Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
title_short	Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
title_full	Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
title_fullStr	Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
title_full_unstemmed	Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America
title_sort	catchment scale evaluation of multiple global hydrological models from isimip2a over north america
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/885153ec3db848d384e05951cbb27b43
work_keys_str_mv	AT magalitroin catchmentscaleevaluationofmultipleglobalhydrologicalmodelsfromisimip2aovernorthamerica AT richardarsenault catchmentscaleevaluationofmultipleglobalhydrologicalmodelsfromisimip2aovernorthamerica AT elysefournier catchmentscaleevaluationofmultipleglobalhydrologicalmodelsfromisimip2aovernorthamerica AT francoisbrissette catchmentscaleevaluationofmultipleglobalhydrologicalmodelsfromisimip2aovernorthamerica
_version_	1718431361657733120

Catchment Scale Evaluation of Multiple Global Hydrological Models from ISIMIP2a over North America

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