Dynamic attribution of global water demand to surface water and groundwater resources: Effects of abstractions and return flows on river discharges

Autor: de Graaf, I. E. M., van Beek, L. P. H., Wada, Y., Bierkens, M. F. P., Landscape functioning, Geocomputation and Hydrology, Hydrologie
Přispěvatelé: Landscape functioning, Geocomputation and Hydrology, Hydrologie
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Advances in Water Resources, 64, 21. Elsevier Limited
Advances in Water Resources 64 (2014)
Advances in Water Resources, 64, 21-33
ISSN: 0309-1708
Popis: As human water demand is increasing worldwide, pressure on available water resources grows and their sustainable exploitation is at risk. To mimic changes in exploitation intensity and the connecting feedbacks between surface water and groundwater systems, a dynamic attribution of demand to water resources is necessary. However, current global-scale hydrological models lack the ability to do so. This study explores the dynamic attribution of water demand to simulated water availability. It accounts for essential feedbacks, such as return flows of unconsumed water and riverbed infiltration. Results show that abstractions and feedbacks strongly affect water allocation over time, particularly in irrigated areas. Also residence time of water is affected, as shown by changes in low flow magnitude, frequency, and timing. The dynamic representation of abstractions and feedbacks makes the model a suitable tool for assessing spatial and temporal impacts of changing global water demand on hydrology and water resources.
Databáze: OpenAIRE
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