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Erschienen in: Water Resources Management 7/2020

01.05.2020

The Benefit of Using an Ensemble of Global Hydrological Models in Surface Water Availability for Irrigation Area Planning

verfasst von: Alexander Kaune, Patricia López, Anouk Gevaert, Ted Veldkamp, Micha Werner, Charlotte de Fraiture

Erschienen in: Water Resources Management | Ausgabe 7/2020

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Abstract

Hydrological data and information on the availability of water are essential to support water allocation decisions in irrigated agriculture, especially under increasingly water scarce conditions. However, in many agricultural regions hydrological information is scarce, leading to sub-optimal water allocation decisions and crop yield reduction. Here we assess the benefit of using surface water availability estimates derived from an ensemble of global hydrological models for establishing the potential area that can be irrigated; where the size is determined based on agreed water supply reliability targets. Risky outcomes of the annual agricultural production due to the true occurrence of water scarcity are generated for both the reference and established irrigation areas, resulting in a Relative Utility Value (RUV) that expresses the utility of the information used. Results show that using an ensemble of global hydrological models provides more robust estimates of the planned area compared to using any of the single global models that constitutes the ensemble. A comparison of the information content in the ensemble shows that an ensemble with a period of record of 15 years has an information content equivalent to a single model of 30 years.

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Metadaten
Titel
The Benefit of Using an Ensemble of Global Hydrological Models in Surface Water Availability for Irrigation Area Planning
verfasst von
Alexander Kaune
Patricia López
Anouk Gevaert
Ted Veldkamp
Micha Werner
Charlotte de Fraiture
Publikationsdatum
01.05.2020
Verlag
Springer Netherlands
Erschienen in
Water Resources Management / Ausgabe 7/2020
Print ISSN: 0920-4741
Elektronische ISSN: 1573-1650
DOI
https://doi.org/10.1007/s11269-020-02544-1

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