Using resistivity methods to characterize the geometry and assess groundwater vulnerability of a Moroccan coastal aquifer

Benabdelouahab, Sara; Salhi, Adil; Himi, Mahjoub; Messari, Jamal Eddine Stitou El; Casas, Albert; Mesmoudi, Hakim; Benabdelfadel, Abdelhamid

doi:10.1016/j.gsd.2018.07.004

Cited by 21 publications

(9 citation statements)

References 30 publications

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“…1, 5, 6). The spatial distribution of rainfall is closely correlated with topographic conditions as suggested in many studies in mountainous regions [69][70][71][72][73]. Thus, in our case, the highest annual average rainfall (over 1000 mm) is linked to elevations of more than 800 m. Obviously, the heavy cloud masses are discharged mainly inside the mountainous belt (which act as an atmospheric barrier or enhancing convection).…”

Section: Fig 2 Examples Of Annual Rainfall Temporal Evolutionsupporting

confidence: 76%

Rainfall distribution and trends of the daily precipitation concentration index in northern Morocco: a need for an adaptive environmental policy

et al. 2019

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A national priority at the Moroccan level is to understand the spatiotemporal rainfall irregularity to anticipate suitable strategies for water and agriculture management. The most northern mountainous region shows intense sensitivity to extreme hydroclimatic hazards which may compromise the future of socioeconomic acceleration and further weaken environmental balances. However, planning and decision making require accurate data, on a detailed scale and with good spatial distribution which is not the case in several south-Mediterranean countries where rainfall data and/or wellestablished hydro-meteorological network is lacking. In this paper, abundant rain gauge measurements combined with time-series open data (1958-2015) were used to study the rainfall variability. Results show an annual rainfall increase trend since 1996 with frequent, intense and abundant rains causing violent torrents and floods. This humid trend alternates with short but severe dry periods. Spatial distribution shows a rainfall increase from eastern to western area and from the coastal plains to high mountains. Based on a continuous daily rainfall dataset (from 1988 to 2012) from six scattered stations, it appears that the pattern of heavy and extreme wet days takes the form of an irregular interannual cycle. Trends of the annual precipitation daily concentration indicate a significant positive trend in the center than in the East of the study area. Considering these observations, a review of water needs/obligations priorities seems crucial so that a new conscious and adaptative environmental policy would approve new procedures for a sustainable management.

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Section: Fig 2 Examples Of Annual Rainfall Temporal Evolutionsupporting

confidence: 76%

Rainfall distribution and trends of the daily precipitation concentration index in northern Morocco: a need for an adaptive environmental policy

et al. 2019

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“…The GOD-Foster method is the most widely used in assessing vulnerability to pollution, sedimentary aquifers. The GOD method (Groundwater occurrence "G", Overall class of aquifer 'O' and Depth to groundwater table 'D') was developed by Foster in 1987 presenting the vulnerability of the aquifer to the vertical percolation of pollutants across the unsaturated zone, while neglecting the lateral migration of pollutants in the saturated zone (Lobo Ferreira & Oliveira, 2004;Fraga et al, 2013;Ghazavi & Ebrahimi, 2015;Benabdelouahab et al, 2018;Boulabeiz et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Study of Intrinsic Vulnerability to Pollution by the GOD-Foster Method: Application to Temara Groundwater (Morocco)

Taazzouzte¹,

Ghafiri²,

Lemacha³

et al. 2020

GEP

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In Morocco, groundwater is of major importance in national economic policy, that's why groundwater management programs are periodically installed to prevent their qualitative and quantitative degradation. Our work comes to contribute to this program by studying the inherent vulnerability to pollution of the Skhirate-Temara region (NW Morocco) using the GOD-Foster method. The latter defines the vulnerability of aquifers based on the resistance to pollutant penetration and the mitigation capacity of the underlying layer of the saturated zone while neglecting the lateral migration of pollutants into the saturated zone. The vulnerability map will delineate areas vulnerable to pollution and will serve as a decision-making tool to take the necessary action.

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“…Across the study area, a said basal layer mainly formed by semiconsolidated gravel pebble and/or sand deposits separates these two layers (Stitou. 1995;Himi et al 2017;Benabdelouahab et al 2018) (Fig. 4).…”

Section: Basin Geometry From Core-drilling Logsmentioning

confidence: 97%

Seismic site-effects assessment in a fluvial sedimentary environment: case of Oued Martil floodplain, Northern Morocco

Hilali

Bounab

Timoulali

et al. 2023

Preprint

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In Northern Morocco, seismic site effects in general and liquefaction hazard in particular can occur in the event of a major earthquake due to the thick sedimentary cover characterizing the peripheral Neogene basins of the Alboran Sea. An example is Martil Plain which was the subject of important economic development during the last two decades. In this regard, we present in this study as assessment of seismic site-effect hazard through the HVSR method and the Kg index. MASW and coredrilling data are also used to complete our analysis and interpret the spatial distribution of Kg maps. Our findings suggest more vulnerability to liquefaction in the Southern segment of the basin, which can be explained by the asymmetrical geometry of Quaternary sedimentation, due to tectonic uplift that influences also the surface and subsurface hydrology processes. As a result, some districts, especially those classified as economically disadvantaged, are found to be the most exposed to this hazard, which must be taken into consideration in future risk reduction and mitigation plans. We conclude the existence of significant seismic effects potential despite the moderate seismicity of the area. Therefore, our research needs to be completed by scenario based seismic hazard modelling to investigate the capacity of seismic events at the region to produce the above suggested amplifications.

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Using resistivity methods to characterize the geometry and assess groundwater vulnerability of a Moroccan coastal aquifer

Cited by 21 publications

References 30 publications

Rainfall distribution and trends of the daily precipitation concentration index in northern Morocco: a need for an adaptive environmental policy

Rainfall distribution and trends of the daily precipitation concentration index in northern Morocco: a need for an adaptive environmental policy

Study of Intrinsic Vulnerability to Pollution by the GOD-Foster Method: Application to Temara Groundwater (Morocco)

Seismic site-effects assessment in a fluvial sedimentary environment: case of Oued Martil floodplain, Northern Morocco

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