Estimation du champ de transmissivité d’un aquifère alluvial fortement hétérogène à partir de la résistance transversale. Application à la nappe du Haouz de Marrakech (Maroc)

Sinan, Mohamed; Razack, Moumtaz

doi:10.7202/013540ar

Cited by 11 publications

(8 citation statements)

References 34 publications

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“…The hydraulic conductivity values vary from 6 × 10 −5 to 4 × 10 −4 m s −1 . They are relatively low but are in good agreement with other reported for the area (Sinan & Razack, 2006). The effective porosity at 2 and 3 m (0.18%–0.20%) depth is lower than that at 1 and 4 m (0.27%–0.30%).…”

Section: Resultssupporting

confidence: 92%

“…The recharging events were simulated using 1DTemPro. The hydraulic conductivities inferred from the grain size analysis (Table 3) and the effective porosities of the sediment deduced from the measured water content data ( & Razack, 2006). The effective porosity at 2 and 3 m (0.18%-0.20%) depth is lower than that at 1 and 4 m (0.27%-0.30%).…”

Section: Numerical Modeling Of Heat For Recharging Eventsmentioning

confidence: 99%

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Seasonality in Intermittent Streamflow Losses Beneath a Semiarid Mediterranean Wadi

Fakir

Bouimouass

Constantz

2021

Water Resources Research

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Intermittent and ephemeral streams are predominant in arid-semiarid Mediterranean regions (Gutiérrez-Jurado et al., 2019). Their occurrence in watersheds has steadily increased due to increasing groundwater pumping as well as general decadal scale drying of these watersheds, possible linked to climate change. Both ephemeral and intermittent streams are classified as nonperennial channels with zero-flow periods (Magand et al., 2020;Nikolopoulos et al., 2011), alternation between dry and wet phases, extreme flow variations and flashfloods (Tzoraki et al., 2013;Vivoni et al., 2006) with high suspended sediment transport (Alexandrov & Laronne, 2003;De Girolamo et al., 2015). Compared to ephemeral streams, intermittent streams often experience shorter zero-flow periods over the hydrological year and typically longer wet seasons of steady streamflow. Semiarid regions characterized by long duration, wet season streamflows in winter and spring are particularly prone to intermittent flow. In wet seasons, intermittent streams are fed by rainfall or snowmelt and may flow continuously or intermittently, either as normal flow (baseflow) or floods. In dry seasons, they are generally dry or flow as flashfloods in response to episodic storms thus showing a strictly ephemeral behavior.In semiarid regions, the demand for water resources has steadily increased with growing populations, which has increased a need to study streamflow losses considered as the main source of groundwater recharge (Simmers, 2003;Shentsis & Rosenthal, 2003). Hence, streamflow infiltration and subsequent potential recharge beneath nonperennial streams have been a topic of great interest in recent decades. Various methods were used to study these processes (

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Section: Resultssupporting

confidence: 92%

Section: Numerical Modeling Of Heat For Recharging Eventsmentioning

confidence: 99%

Seasonality in Intermittent Streamflow Losses Beneath a Semiarid Mediterranean Wadi

Fakir

Bouimouass

Constantz

2021

Water Resources Research

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“…Furthermore, the channels located in the left side of the Ourika stream, to the North, divert greater volumes of water than those located in the right side where agricultural crops are less extensive. fer is characterized by heterogeneous transmissivity values varying from 9 × 10 −2 to 5 × 10 −5 m 2 /s 1 with an average of 6.7 × 10 −3 m 2 /s 1 (Sinan & Razack, 2006) and hydraulic conductivities values from 5.5 × 10 −3 to 4.6 × 10 −6 m/s with a mean of 4.4 × 10 −4 m/s. The groundwater provides drinking water for the villages and irrigation water when streamflow deliveries are insufficient.…”

Section: Irrigation By Streamflow Diversionmentioning

confidence: 99%

Groundwater recharge sources in semiarid irrigated mountain fronts

Bouimouass

Fakir

Tweed

et al. 2020

Hydrological Processes

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High‐elevation mountains often constitute for basins important groundwater recharge sources through mountain‐front recharge processes. These processes include streamflow losses and subsurface inflow from the mountain block. However, another key recharge process is from irrigation practices, where mountain streamflow is distributed across the irrigated piedmont. In this study, coupled groundwater fluctuation measurements and environmental tracers (18O, 2H, and major ions) were used to identify and compare the natural mountain‐front recharge to the anthropogenically induced irrigation recharge. Within the High Atlas mountain front of the Ourika Basin, Central Morocco, the groundwater fluctuation mapping from the dry to wet season showed that recharge beneath the irrigated area was higher than the recharge along the streambed. Irrigation practices in the region divert more than 65% of the stream water, thereby reducing the potential for in‐stream groundwater recharge. In addition, the irrigation areas close to the mountain front had greater water table increases (up to 3.5 m) compared with the downstream irrigation areas (<1 m increase). Upstream crops have priority to irrigation with stream water over downstream areas. The latter are only irrigated via stream water during large flood events and are otherwise supplemented by groundwater resources. These changes in water resources used for irrigation practices between upstream and downstream areas are reflected in the spatiotemporal evolution of the stable isotopes of groundwater. In the upstream irrigation area, the groundwater stable isotope values (δ18O: −8.4‰ to −7.4‰) reflect recharge by the diverted stream water. In the downstream irrigation area, the groundwater isotope values are lower (δ18O: −8.1‰ to −8.4‰) due to recharge via the flood water. In the nonirrigation area, the groundwater has the highest stable isotope values (δ18O: −6.8‰ to −4.8‰). This might be due to recharge via subsurface inflow from the mountain block to the mountain front and/or recharge via local low altitude rainfall. These findings highlight that irrigation practices can result in the dominant mountain‐front recharge process for groundwater.

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“…From a structural point of view, the study area is characterised by a succession of several tectonic episodes (Soulaimani 1991). The Hercynian deformation which constitutes the major structural phase is marked in Namurian and Wesphalian time by a signiﬁcant compression responsible for the ENE-WSW to NE-SW orientation of regional schistosity.…”

Section: Geological Settingmentioning

confidence: 99%

Gravity and magnetic data processing further constrained inversion for 3D modelling and tonnage calculation

Soulaimani

Chakiri

Manar

et al. 2020

Applied Earth Science

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Geophysical data processing further constrained inversion is evolving progressively prevalent in geoscience domains for three-dimensional modelling and resources evaluation. The process is based on the magnetic and gravity data processing further constrained Cartesian cut cell inversion to discern the maximum of information about HAJJAR deposit in order to calculate its tonnage. This article exhibits data and inversion processing technique for tonnage calculation based on an important geophysical magnetic and gravity surveys of defined extent of HAJJAR region, which presents a great benefit to save time and have accurate and realistic results to a same case. Otherwise, the potential-field signatures of what are regarded to be geologically expressive features are sought within the magnetic and gravity data. The preliminary stage for tonnage calculation was residual anomaly processing and depth estimation of the orebody using spectral analysis method. However, progressing towards extracting the deposit signature, the used method leads to invest the gravity signature of the orebody in adequacy with the magnetic signature. Finally, the tonnage calculation was developed by constrained Cartesian cut cell inversion using Voxi Earth Modelling TM . Obtained results were very important, given their qualitative and quantitative accuracy, which give an added value for the governmental geological and geophysical survey.

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Estimation du champ de transmissivité d’un aquifère alluvial fortement hétérogène à partir de la résistance transversale. Application à la nappe du Haouz de Marrakech (Maroc)

Cited by 11 publications

References 34 publications

Seasonality in Intermittent Streamflow Losses Beneath a Semiarid Mediterranean Wadi

Seasonality in Intermittent Streamflow Losses Beneath a Semiarid Mediterranean Wadi

Groundwater recharge sources in semiarid irrigated mountain fronts

Gravity and magnetic data processing further constrained inversion for 3D modelling and tonnage calculation

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