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The Drader Souiere basin is a part of the hydrological basin of Sebou that is known by a high agricultural activity. The work aims to establish the relationship between sedimentary filling and aquifer facies distribution as well as to provide a new approach to interpretation, interpolation and identification. In this paper, a methodology that combines, a geological field and boreholes data with geophysical data (tomography, logging and seismic), is adopted and integrated, in a Geographic Information System (GIS), in order to establish isobaths map of Tortonian-Messinian marls bedrock, to determine the sequential position of Pliocene-Quaternary aquifers and to highlight the roles of deep structures in these aquifers arrangement. Tortonian-Messinian marls constitute the basin substrate; deposited on the Pre-Rif layers, from where he inherits his structuration, in the form of NW-SE ripples (an anticlinal-synclinal succession). The Pliocene-Quaternary sedimentary filling by paleo-channels, sea level oscillations and Miocene syn-sedimentary tectonics, give to the basin a «piano keys» geometry with various sedimentary environments. The most important aquifers of the basin match the regressive sea level periods of Zanclean and middle-upper Pleistocene. These new data provide other perspectives to quantitative research by hydrodynamic modeling of the water resources basin. [ABSTRACT FROM AUTHOR]

A 110 ha dump, located in the Akrach shallow aquifer area in Morocco, was studied in order to characterize the quality of groundwater around the landfill, to delineate the contaminated area and to determine the factors favouring the contamination of groundwater. This dump is located in the city of Oum Azza (15 km south from Rabat), (Map 1). between the Akrach River in the west and the Sidi Mohamed Ben Abdellah Dam in the east. To assess groundwater pollution from this landfill, piezometric monitoring and Hydrochemical analyses were conducted on 22 wells. The results highlight a significant degradation in the groundwater quality, especially in the parts located in the direct vicinity downstream the dump. In the impacted areas, electrical conductivity was above 1100 μS cm-1, bicarbonates were higher than 508 mg L-1, chlorides, sulphate, and nitrates contents were higher than 850, 200 and 1 mg L-1, respectively. In addition we found high cadmium (50 - 100 μg L-1) and chromium (40 - 230 μg L-1) contents, i.e. much higher than the WHO guidelines for drinking or irrigation water. A principal component analysis conducted on this dataset highlights the absence of a prevalent principal component (PC), with the variance distributed across many PCs. The mechanisms responsible for the chemical variance of the hydro system are therefore numerous and fairly balanced in terms of influence. Finally, a hierarchical classification brings out three groups of observations, each group corresponding to a level of pollution. [ABSTRACT FROM AUTHOR]