Étude du fonctionnement du système aquifére karstique Cénomano-Turonien de l'oued Igrounzar, bassin d'Essaouira, Maroc

Jalal, M.; Blavoux, Bernard; Bahir, Mohammed; Bellion, Yves; Laftouhi, Nour‐Eddine; Puig, Jean-Michel; Mennani, A.; Daniel, Michel

doi:10.1016/s0899-5362(02)00056-8

Cited by 23 publications

(9 citation statements)

References 3 publications

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“…Since then many studies have been carried out in the field of environmental isotope hydrogeology, with different aims, such as determination of the origin and dynamics of groundwater or its salinity,8–12 surveying the variations in the composition of the water in geothermal reservoirs induced by earthquakes,13 the study of water recharge of rivers and lakes,3, 14 and paleoclimatic investigations 15…”

mentioning

confidence: 99%

Coast and year effect on H, O and C stable isotope ratios of Tyrrhenian and Adriatic italian olive oils

Bontempo

Camin

Larcher

et al. 2009

Rapid Comm Mass Spectrometry

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The paper discusses the (2)H/(1)H, (18)O/(16)O and (13)C/(12)C ratios of 196 authentic Italian extra-virgin olive oils produced in 3 years on the Tyrrhenian and Adriatic coasts. The (2)H/(1)H and (18)O/(16)O ratios were linearly and positively correlated. The year of production influenced mainly (18)O/(16)O in relation to the amount of rainfall and the atmospheric humidity in the period of oil accumulation in the olives. The (2)H/(1)H ratio significantly distinguished the olive oils produced on the Adriatic coast from those on the Tyrrhenian coast in each year. This coast effect is a consequence of the different sources and isotopic compositions of the rainfall and the different climatic conditions on the two coasts. The paper contributes towards understanding the influence of climatic factors on isotopic variability and towards improving the traceability of the geographical origin of olive oils, using (2)H/(1)H as a more innovative parameter.

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mentioning

confidence: 99%

Coast and year effect on H, O and C stable isotope ratios of Tyrrhenian and Adriatic italian olive oils

Bontempo

Camin

Larcher

et al. 2009

Rapid Comm Mass Spectrometry

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“…These synclines contain important water reservoirs, notably the Cenomanian-Turonian aquifer which remains the most important in the region. According to Jalal et al (2001), this aquifer has transmissivities varying between 2.2*10 -4 and 2.7*10 -1 m²/s. The downstream part contains 2 important aquifers: (i) the Plio-quaternary and the (ii) Turonian in the northern part, between Ksob wadi and Tidzi wadi, (iii) the Barremian-Aptian located between Tidzi wadi and Amssittene anticline and (iv) the Hauterivian, southern limit of the study area, is interposed between the Amssittene anticline and Igouzoullene wadi (Fig.2).…”

Section: Study Areamentioning

confidence: 99%

Quantitative and Qualitative Assessment of Groundwater from Semi-Arid Zones in the Context of Climate Change, Example of Essaouira Region, Morocco

Bahir¹,

Ouhamdouch²,

Ouazar³

et al. 2020

Preprint

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This study aims to assess the effect of climate change on water resources in semi-arid environments, taking the Essaouira region as an example. Analysis of climate data shows a downward trend in precipitation of 12 to 16% and an increase in air temperature of 2.3 °C over the past three decades. The piezometric study shows a continuous drop in the piezometric level which exceeds 12 m for the Cenomanian-Turonian aquifer, 17 m for the Plio-Quaternary aquifer, around 8 m for the Barremian-Aptian aquifer and 5 m for the Hauterivian. Hydrogeochemical analysis shows that (i) the groundwater mineralization is controlled by the dissolution of evaporitic and carbonates minerals, by the reverse ions exchange phenomenon, and by the marine intrusion, especially at Plio-Quaternary aquifer; (ii) the groundwater quality in the study area deteriorates gradually over time and space. The isotopic technique shows that (i) the groundwater recharge in the study area is ensured by precipitation of oceanic origin without significant evaporation and that (ii) climate change has no remarkable effect on the isotopic content of the groundwater of the study area. However, the results of this article reflect that the Essaouira basin is very vulnerable to climate change.

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“…Sur le plan hydrogéologique, l'analyse de la série stratigraphique et des résultats des sondages méca- niques réalisés dans la zone, pennettent de mettre en évidence un aquifere contenu dans le Cénomano-Turonien, qui alimente les plus grandes sources karstiques de la région (Jalal et al, 2000). Cet aquifere se caractérise par des transmissivités comprises entre 2,2 x 10-4 et 2,7 x 10-1 m 2 /s, son substratum est formé par les mames vertes de l' oued Tidzi.…”

Section: Hydrogéologieunclassified

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Bahir¹,

Jalal²,

Mennani³

et al. 2001

Estud. geol.

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The synclinal basin of Kourimat, situated in the oriental part of Essaouira basin, shelters an aquiferous carbonate. This aquiferous represents the unique resource in water for the region.The study undertaken on this aquiferous has allowed us the characterize it viewpoint hydrodynamically, hydrogeologically and hydrogeochimically. The piezometric map of the system shows a senses of water flow underground of the southeast to the northwest. The hydraulic gradient varies from the upstream to the downstream. The evolution of the piezometry at one time watch of annual and seasonal fluctuations in connection with variations of precipitations.The results of chemical analyses have allowed to distinguish two aquiferious: the first is Cenomanian, the second is Turonian. Theses aquiferious were diffrenciated by there chemical facies and the origine of chemicals elements.Key words: Essaouira, Kourimat, Aquiferous, Cenomanian, Turonian, piezometry, hydrochemistry. RESUME La cuvette synclinale de Kourimat, située dans la partie orientale du bassin d'Essaouira, abrite un aquifere carbonaté constituant l'unique ressource en eau de la région.L' étude entreprise sur cet aquifere a permis de le caractériser de point de vue hydrodynamique, hydrogéologique et hydrogéochimique. La carte piézométrique du systeme montre un sens d'écoulement global du sud-est vers le nord-ouest. Le gradient hydraulique varie de l'amont vers l'aval. Les fluctuations piézométriques montrent une bonne corrélation avec les aléas climatiques.Les résultas de l'étude hydrochimique ont permis de mettre en évidence l'existence de deux nappes: la premiere dans le Cénomanien et l'autre dans le Turonien. Ces deux nappes se différencient par leurs facies chimiques et par l' origine des éléments en solution.

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Étude du fonctionnement du système aquifére karstique Cénomano-Turonien de l'oued Igrounzar, bassin d'Essaouira, Maroc

Cited by 23 publications

References 3 publications

Coast and year effect on H, O and C stable isotope ratios of Tyrrhenian and Adriatic italian olive oils

Coast and year effect on H, O and C stable isotope ratios of Tyrrhenian and Adriatic italian olive oils

Quantitative and Qualitative Assessment of Groundwater from Semi-Arid Zones in the Context of Climate Change, Example of Essaouira Region, Morocco

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