Hydrochemical constraints between the karst Tabular Middle Atlas Causses and the Saïs basin (Morocco): implications of groundwater circulation

Miche, Hélène; Saracco, Ginette; Mayer, Adriano; Qarqori, Khaoula; Rouai, M.; Dekayir, Abdelilah; Chalikakis, Konstantinos; Emblanch, Christophe

doi:10.1007/s10040-017-1675-0

Cited by 14 publications

(8 citation statements)

References 21 publications

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“…During periods of intense rainfall, water turbidity is observed [36], reducing water quality. This turbidity can be attributed internally to the leaching of the karstic network in which meteoric water circulates, and also externally, at the level of infiltration within different karst landforms [7,41].…”

Section: Geological and Geomorphological Overview Of The Middle Atlasmentioning

confidence: 99%

“…Among these karst landforms, collapse and cover-subsidence dolines and dissolution sinkholes have been identified as a source of environmental and geo-hazards risks. Chemical analysis performed on water springs located in the junction of the TMA and Saïs Basin [7][8][9][10] revealed that, during periods of high precipitation, the degradation of water quality is linked to superficial pollutants infiltrated into reservoirs through sinkholes located in agricultural areas, thus resulting in the internal gradual erosion of karst systems. The pesticides, herbicides and chemical fertilizers used in farming and agricultural production percolate into the groundwater aquifer and consequently change the composition, color and the taste of water springs.…”

Section: Introductionmentioning

confidence: 99%

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Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

et al. 2020

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The Causse of El Hajeb belongs to the Tabular Middle Atlas (TMA), in which thousands of karst landforms have been identified. Among them, collapse dolines and dissolution sinkholes have been highlighted as a source of environmental risks and geo-hazards. In particular, such sinkholes have been linked to the degradation of water quality in water springs located in the junction of the TMA and Saïss basin. Furthermore, the developments of collapse dolines in agricultural and inhabited areas enhance the risk of life loss, injury, and property damage. Here, the lack of research on newly formed cavities has exacerbated the situation. The limited studies using remote sensing or geophysical methods to determine the degree of karstification and vulnerability of this environment fail to provide the spatial extent and depth location of individual karst cavities. In order to contribute to the effort of sinkhole risk reduction in TMA, we employed remote sensing and geophysical surveys to integrate electrical resistivity tomography (ERT) and self-potential (SP) for subsurface characterization of four sinkholes identified in the Causse of El Hajeb. The results revealed the existence of sinkholes, both visible and non-accessible at the surface, in carbonate rocks. The sinkholes exhibited distinct morphologies, with depths reaching 35 m. Topography, geographic coordinates and land cover information extracted on remote sensing data demonstrated that these cavities were developed in depressions in which agricultural activities are regularly performed. The fusion of these methods benefits from remote sensing in geophysical surveys, particularly in acquisition, georeferencing, processing and interpretation of geophysical data. Furthermore, our proposed method allows identification of the protection perimeter required to minimize the risks posed by sinkholes.

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Section: Geological and Geomorphological Overview Of The Middle Atlasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

et al. 2020

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“…Around this area, Strombolian cones show a slightly higher elevation, but phreatomagmatic centres are generally located in a lower eastward area, which can be much closer to the shallow water table. The widespread karstic-carbonate rock layers combined to heavy precipitations as rain and as snow, make of the tabular Middle-Atlas an abundant groundwater sources (Amraoui 2004, Martin 1981, Miche et al 2018, regarded as a great water tower and hydrological regulator in Morocco (Bentayeb, Leclerc 1977, Peyron 1980, Menjour et al 2017. Generally, the Strombolian dynamic activity is dominant consisting of 66% of volcanic events.…”

Section: Geologic and Geomorphologic Setting Of The Study Areamentioning

confidence: 99%

Geomorphological Classification and Landforms Inventory of the Middle-Atlas Volcanic Province (Morocco): Scientific Value and Educational Potential

Amine

Hassani

Remmal

et al. 2019

Quaestiones Geographicae

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Through the tabular morphology of northwestern part of the Middle-Atlas in Morocco, numerous uncovered monogenetic volcanoes arise structured of pyroclastic product layers and lava flows. Our fieldwork results witness a wide-ranging volcanic shape spectrum, as cones, maars, tuff-rings, and cone-maar mixes, generally associated with a later lava flow discharge that could develop many surfaces and appearances. There are withal sundry eruptive products such as pahoehoe lava, scoria, tuff, lapilli, peperites, base-surges, bombs, etc. This monogenetic volcanic field of practically 1000 km2 offers remarkable eruptive landforms, referred to as the largest, and the youngest volcanic field in Morocco, which consists of a large area within the Ifrane National Park. This fieldwork study provides a renewed volcanic geomorphological classification table and GIS data to be used by a wide public range for both educational and geo-touristic interest and access effectively to such a high-mountain natural museum. In the event that these volcanic structures were appropriately dealt with, the high educational scientific content and the notable touristic vocation would almost certainly create business openings and new financial wages for neighborhood populaces. This work focuses to share our outcomes and emphases the scientific value about the monogenetic volcanic field around the tabular Middle-Atlas in Morocco.

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“…In Morocco, the Tabular Middle Atlas Causses reservoir is the main drinking water supply of Fez-Meknes region. However, in rainfall periods their water quality is impaired, due to a strong turbidity [2]. This phenomenon is well known in karstic springs and can make the water unfit for consumption [3].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Sludge Produced by Treatment of Water from the Ribaa and Bittit Karstic Springs (Meknes, Morocco)

Basri¹,

Farhaoui²,

Talbi³

et al. 2020

JWARP

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Problem Statement: Surface Water Treatment for potable supplies typically involves coagulation, flocculation, and processes. All water treatment plants produce sludge, during the purification of raw water, according to the level of the water turbidity. The aluminum sulfate is the most common coagulant used in water treatment plants of Morocco, as well as in many countries all over the world. It is difficult to manage sludge produced by the treatment plant. However, several studies, based on a set of jar test experiments, have demonstrated that it can be used in the process to improve the quality of the treated water and reduce the aluminum sulfate dose. Approach: In this study, the raw water treated and sludge produced in water treatment plant of Meknes, Morocco are investigated for chemical and bacteriological proprieties. The texture characterization of the dried sludge produced through the process of coagulation/flocculation and that of aluminum sulfate, used as coagulant aid, are obtained by nitrogen adsorption isotherms. Results: The physical properties of the raw water indicate its high turbidity during periods of heavy rainfall in the Bittit and Ribaa springs catchment area. However, these chemical properties indicate the quality of fresh water rich in magnesium, related to the dolomitic nature of the liastic aquifer. The bacteriological analysis of sludge produced in the treatment plant, confirms the elimination of pathogenic germs by the treatment process used. As regards the texture characterization the results demonstrated that the sludge presents some similarities with the sulfate. However, a clear difference is observed between the two solids, according to the pores distribution. Conclusions/Recommendations: Taking aluminum sulfate and sludge in comparison, it is possible to use the sludge for improving the coagulation process in water treatment.

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Hydrochemical constraints between the karst Tabular Middle Atlas Causses and the Saïs basin (Morocco): implications of groundwater circulation

Abstract: HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers.

Cited by 14 publications

References 21 publications

Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

Geomorphological Classification and Landforms Inventory of the Middle-Atlas Volcanic Province (Morocco): Scientific Value and Educational Potential

Characterization of Sludge Produced by Treatment of Water from the Ribaa and Bittit Karstic Springs (Meknes, Morocco)

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