Gravity contribution to the study of the deep structure of Bou-Houria basin (northeastern Morocco): hydrogeological implications [Contribution de la gravimétrie à l’étude de la structure profonde du bassin de Bou-Houria (Maroc Nord-oriental) : implications hydrogéologiques]
Aqil H.,University Mohammed Premier |
Aqil H.,Presidence Of Luniversite Mohammed Premier |
Khattach D.,University Mohammed Premier |
Khattach D.,Presidence Of Luniversite Mohammed Premier |
And 4 more authors.
Hydrological Sciences Journal | Year: 2015
This study aims to improve the knowledge of the structure of Bou-Houria basin through analysis and re-interpretation of available gravimetric data. A residual anomaly and first vertical derivative maps were calculated from the Bouguer anomaly, which is affected by a strong regional gradient. The computed map provides information on the variation of density in the basement rock, and provide a better understanding of the structural elements in the study area and to highlight new faults that are generally concealed by the Quaternary deposits. The results let to the improvement of the structural map of the study area, which could form the basis to guide future groundwater exploration in the basin. © 2015, IAHS.
Leaching investigation of sewage sludge stocks of nador: Field study and experimental provision [Investigation du lessivage des stocks de boues d'épuration de nador: Étude sur terrain et apport de l'expérimentation]
Zerrouqi Z.,University Mohammed Premier |
Zerrouqi Z.,Presidence Of Luniversite Mohammed Premier |
Sbaa M.,University Mohammed Premier |
Sbaa M.,Presidence Of Luniversite Mohammed Premier |
And 3 more authors.
Revue des Sciences de l'Eau | Year: 2011
The wastewater treatment plant (WTP) of Nador, using an activated sludge process, generates large quantities of sludge, which create a serious environmental problem. The sludge is stored near the Nador lagoon, without any measures to ensure protection of the environment. During the rainy period, the organic compounds and generating a leachate. Our study aimed to characterize the leachate from the stocked sludge and to explore experimentally, using a percolation test, the risk of contamination of water resources. The results of physicochemical analysis showed that the leachate is rich in total Kjeldhal nitrogen (TKN max = 1,440 mg•L -1), nitrate (NO 3 max = 88.6 mg•L -1), total phosphorus (TP max = 88.8 mg•L -1) and orthophosphate (PO 4 max = 20.9 mg•L -1). In addition, the leachate has high contents of SO 4, Cl, Ca, Mg, Na and K. The leachate also contains heavy metals, mainly Cu and Zn. The percolation test indicates important levels of nitrogen and phosphorus leached from the sludge in comparison to the soil control. Furthermore, the quantities of NO 3, NH 4, TKN, PO 4 and TP exported by leaching through the sludge are respectively, 8 fold, 21 fold, 35 fold, 3 fold and 18 fold higher than those leaching through soil. In addition, the levels of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn) leached from sludge (0.07% of the initial load) are 2 fold higher than the levels leached from soil.