Development and testing of the WaterGAP 2 global model of water use and availability
Top Cited Papers
- 1 June 2003
- journal article
- Published by Taylor & Francis in Hydrological Sciences Journal
- Vol. 48 (3) , 317-337
- https://doi.org/10.1623/hysj.48.3.317.45290
Abstract
Growing interest in global environmental issues has led to the need for global and regional assessment of water resources. A global water assessment model called “WaterGAP 2” is described, which consists of two main components'a Global Water Use model and a Global Hydrology model. These components are used to compute water use and availability on the river basin level. The Global Water Use model consists of (a) domestic and industry sectors which take into account the effect of structural and technological changes on water use, and (b) an agriculture sector which accounts especially for the effect of climate on irrigation water requirements. The Global Hydrology model calculates surface runoff and groundwater recharge based on the computation of daily water balances of the soil and canopy. A water balance is also performed for surface waters, and river flow is routed via a global flow routing scheme. The Global Hydrology model provides a testable method for taking into account the effects of clim... Résumé L'intérêt croissant pour les questions globales d'environnement a rendu nécessaire l'évaluation globale et régionale des ressources en eau. Nous décrivons un modèle global d'évaluation de l'eau, appelé “WaterGAP 2”, qui consiste en deux composantes principales: un modèle global d'utilisation de l'eau et un modèle hydrologique global. Ces composantes sont utilisées pour calculer l'utilisation et la disponibilité de l'eau au niveau du bassin versant. Le modèle global d'utilisation de l'eau concerne (a) les secteurs domestique et industriel, en prenant en compte les effets des changements structurels et technologiques sur les besoins en eau, et (b) le secteur agricole, en prenant particulièrement en compte les effets du climat sur les besoins en eau pour l'irrigation. Le modèle hydrologique global calcule quant à lui l'écoulement de surface et la recharge des nappes à partir de l'estimation du bilan hydrique journalier du sol et de la canopée. Un bilan est également calculé pour les eaux libres, et l'...Keywords
This publication has 23 references indexed in Scilit:
- Global estimates of water withdrawals and availability under current and future “business-as-usual” conditionsHydrological Sciences Journal, 2003
- A global hydrological model for deriving water availability indicators: model tuning and validationPublished by Elsevier ,2002
- Critical regions: A model-based estimation of world water resources sensitive to global changesAquatic Sciences, 2002
- Model-based Regional Assessment of Water UseAn Example for Semi-arid Northeastern BrazilWater International, 2002
- Impact of Climate Change and Variability on Irrigation Requirements: A Global PerspectiveClimatic Change, 2002
- Global modeling of irrigation water requirementsWater Resources Research, 2002
- Validation of a new global 30-min drainage direction mapJournal of Hydrology, 2002
- A simple water balance model for the simulation of streamflow over a large geographic domainJournal of Hydrology, 1999
- Development of a world data set of soil water retention properties using pedotransfer rulesGeoderma, 1996
- Efficient prediction of ground surface temperature and moisture, with inclusion of a layer of vegetationJournal of Geophysical Research: Oceans, 1978