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| Titel |
Seasonal patterns of water storage as signatures of the climatological equilibrium between resource and demand |
| VerfasserIn |
B. François, B. Hingray, F. Hendrickx, J. D. Creutin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 18, no. 9 ; Nr. 18, no. 9 (2014-09-30), S.3787-3800 |
| Datensatznummer |
250120480
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| Publikation (Nr.) |
 copernicus.org/hess-18-3787-2014.pdf |
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| Zusammenfassung |
Water is accumulated in reservoirs to adapt in time the availability of the
resource to various demands like hydropower production, irrigation, water
supply or ecological constraints. Deterministic dynamic programming
retrospectively optimizes the use of the resource during a given time period.
One of its by-products is the estimation of the marginal storage water value
(MSWV), defined by the marginal value of the future goods and benefits
obtained from an additional unit of storage water volume. Knowledge of the
MSWV makes it possible to determine a posteriori the storage requirement
scheme that would have led to the best equilibrium between the resource and
the demand. The MSWV depends on the water level in the reservoir and shows
seasonal as well as inter-annual variations. This study uses the inter-annual
average of both the storage requirement scheme and the MSWV cycle as
signatures of the best temporal equilibrium that is achievable in a given
resource/demand context (the climatological equilibrium). For a simplified
water resource system in a French mountainous region, we characterize how and
why these signatures change should the climate and/or the demand change,
mainly if changes are projected in the mean regional temperature (increase)
and/or precipitation (decrease) as well as in the water demand for energy
production and/or maintenance of a minimum reservoir level.
Results show that the temporal equilibrium between water resource and demand
either improves or degrades depending on the considered future scenario. In
all scenarios, the seasonality of MSWV changes when, for example, earlier
water storage is required to efficiently satisfy increasing summer water
demand. Finally, understanding how MSWV signatures change helps to
understand changes in the storage requirement scheme. |
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