Abstract
Long-term time series data of aquifer recharge, groundwater extraction, and discharge are used to estimate aquifer storage capacity and maximum annual yield. Aquifer storage capacity is defined as the maximum volume of water that can be stored in an aquifer. It is estimated using a transient water-balance approach. The maximum annual yield is defined as the maximum combined groundwater extraction plus discharge that can be sustained in an aquifer judged by the historical record of recharge. It is determined according to a graphical mass-curve method. These two quantities are useful in aquifer characterization and groundwater management, the apportionment of groundwater rights and aquifer storage and recovery operations being two frequent applications. Time series data from the Edwards Aquifer, Texas, USA, illustrate the application of the methods presented.
Résumé
Des données sur le long terme de la recharge d’aquifère, de l’exploitation de l’eau souterraine et de la vidange sont utilisées pour estimer la capacité d’emmagasinement de l’aquifère et la capacité annuelle maximum. La capacité d’emmagasinement de l’aquifère est définit comme le volume maximum de l’eau qui peut être emmagasinée dans le réservoir. Elle est estimée en utilisant une approche par bilan hydrologique en transitoire. La capacité annuelle maximum est définit comme la combinaison de l’extraction de l’eau souterraine et de la vidange, combinaison qui peut être jugée durable ou non au regard de l’examen des valeurs de recharge. Elle est déterminée au moyen d’une méthode de courbe des valeurs cumulées. Ces deux quantités sont très utiles pour caractériser les aquifères et pour gérer les eaux souterraines, l’imputation des droits aux eaux souterraines, et du fait que les opérations de recharge des aquifères et de récupération sont très fréquentes. Les données temporelles provenant de l’aquifère Edwards, Texas, USA, illustrent l’application de la méthode présentée.
Resumen
Para estimar la capacidad de almacenamiento de un acuífero y su rendimiento máximo anual, se han utilizado series temporales largas de datos de recarga al acuífero, de extracciones de agua subterránea y de descarga. La capacidad de almacenamiento de un acuífero se define como el volumen máximo de agua que puede ser almacenado en el mismo. Se estima utilizando una aproximación con un balance de agua en régimen transitorio. El rendimiento máximo anual se define como el máximo resultante de la combinación de la extracción de aguas subterráneas y la descarga que puede ser sostenido por un acuífero según los registros históricos de recarga y se define según un método gráfico masa-curva. Estos dos valores son útiles en la caracterización de los acuíferos y en la gestión de las aguas subterráneas, el reparto de los derechos sobre las aguas subterráneas y las operaciones de almacenaje y recuperación de los acuíferos, que son dos aplicaciones frecuentes. Las series de tiempo para el Acuífero Edwards, Texas, USA, ilustra la aplicación de los métodos presentados.
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Acknowledgements
This article was prepared with support from the University of California Water Resources Center through grant WR-2007–09 to research the impacts of modern-age global warming on aquifers.
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Loáiciga, H.A. Aquifer storage capacity and maximum annual yield from long-term aquifer fluxes. Hydrogeol J 16, 399–403 (2008). https://doi.org/10.1007/s10040-007-0270-1
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DOI: https://doi.org/10.1007/s10040-007-0270-1