Gabes Jeffara Aquifers Management in Relation with Oasien Ecosystems

Vernoux, Jean-François; Horriche, Faten Jarraya; Ghoudi, Rhida; Abdedaiem, Slah; Hamza, Mekki

doi:10.1007/978-3-319-70548-4_181

Cited by 2 publications

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“…47 Another negative impact is the degradation of oasis ecosystems, which are strongly related to groundwater 48 (Abdedaiem 2016;Mekki et al 2013). 49 The objective of this study was to improve the groundwater resources management in the Gabes area, taking 50 into account the needs of socioeconomic activities and the sustainable preservation of coastal oasis 51 ecosystems (Vernoux et al 2017c). An important part of this study was devoted to developing a numerical 52 flow model of the Jeffara aquifers to be used as a future groundwater management tool considering different 53 scenarios of recharge or exploitation.…”

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Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems

2020

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8The Gabes Jeffara aquifer system, in southeastern Tunisia, is essentially recharged by rainfall infiltration 9 and by groundwater inflow from the Intercalary Continental aquifer in the northwest. The increase in 10 groundwater pumping for irrigation in recent decades has induced a serious decrease in groundwater levels, 11 depletion of springs and degradation of oasis ecosystems. A multidisciplinary study was carried out to better 12 understand the behavior of oasis ecosystems and aquifer systems and to provide tools and recommendations 13 for water resources management. An important part of the study was devoted to developing a hydrodynamic 14 flow model of the Jeffara aquifer system, which can be used as a future groundwater management tool 15 considering different recharge or exploitation scenarios. This model was built with Processing Modflow, 16 gathering data on geology, hydrogeology, hydrology, rainfall, piezometry, withdrawals and spring flow 17 rates. The model was calibrated in steady state with reference to the piezometric levels measured in 1970 18 and in transient state for the period 1972-2014, using records from more than 200 wells and piezometers. 19 The analysis of current and future water consumption was carried out with existing data, processed satellite 20 images and farmer surveys. This analysis was used to define water demand scenarios combined with 21 scenarios of decreased groundwater withdrawal, reinforced groundwater recharge and use of alternative 22 water resources. The scenarios tested with the model show that the situation will be critical in less than 25 23 years without radical measures to reduce groundwater withdrawals by at least 60 MCM/y. 24 25

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Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems

2020

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“…Más aún, se ha provocado que la calidad del agua pase de aceptable a mala, evidenciando un deterioro que está relacionado con el incremento de los volúmenes de explotación y la disminución de la recarga secundaria de agua de buena calidad (Pino y Coarita, 2018). A su vez, una fuerte explotación de las aguas subterráneas de los acuíferos costeros, provoca el secado de manantiales (Vernoux et al, 2018).…”

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Medidas de mitigación para el acuífero costero La Yarada, un sistema sobreexplotado en zonas áridas

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Este artículo es una revisión del estado actual de la sobreexplotación del acuífero costero La Yarada, emplazado en una zona árida, cabecera del Desierto de Atacama. Según referencia de otros sistemas similares a nivel mundial, se ha identificado las medidas de mitigación más favorables para la conservación del sistema acuífero. Se plantean acciones físicas y no físicas o de gestión, conducentes a la mitigación del colapso y lograr la recuperación y conservación del acuífero.Palabras clave: acuífero La Yarada, medidas de mitigación, conservación del acuífero.

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Gabes Jeffara Aquifers Management in Relation with Oasien Ecosystems

Cited by 2 publications

References 1 publication

Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems

Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems

Medidas de mitigación para el acuífero costero La Yarada, un sistema sobreexplotado en zonas áridas

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