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Water balance in the playa-lakes of an arid environment, Monegros, NE Spain

AutorCastañeda del Álamo, Carmen ; García Vera, Miguel Ángel
Palabras claveArid regions
Wet lands
Monegros desert
Ground water recharge/water budget
Fecha de publicaciónfeb-2008
CitaciónHydrogeology Journal 16 (1): 87-102 (2008)
ResumenThe playa-lakes of the Monegros desert in north-east Spain are saline wetlands in an arid environment, a rare phenomenon in Europe. These extremely valuable habitats are threatened by changes associated with agricultural expansion and incorporation of new irrigated areas. An understanding of the present hydrologic regime will enable changes to be identified, particularly those brought about by flooding and pollution caused by irrigation surplus. This study sets out to show the results of applying a daily water balance in three selected playa-lakes. The balance was in two parts and consisted of: (1) the average balance for all the endorheic basin using the BALAN_11 program, and (2) the water balance in some playa-lakes, applying discharge flows obtained from the previous balance. The resulting volumes of water were converted to water depths and contrasted with reference volumes taken from field and Landsat images. The model was calibrated by applying various hypotheses of function which enabled the results to be adjusted. The proposed balance is an acceptable reproduction of field water measurements during this period, and underlines the consistency of the conceptual model. The methodology used is appropriate for understanding the playa-lakes function and for monitoring them for conservation purposes. © Springer-Verlag 2007.
Versión del editorhttp://dx.doi.org/10.1007/s10040-007-0230-9
Identificadoresdoi: 10.1007/s10040-007-0230-9
issn: 1431-2174
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