Evaluation of water quality of the Meskiana areaonhuman consumption and determination of its effects on land irrigated.

Abstract

Meskianaplain, located in the Northeastern part of Algeria, this plain has hydrous resources relatively limited consist of underground water of the MioPlio-Quaternary aquifer. In recent yearsa high level of waterdemand was felt due to remarkable increase water for agriculture use. On one hand, this hascontributed ina shortage of water and a deterioration of its quality on the other. The goal of this research isto study theinfluencesof the lithological parameters and the climatic factors, onto physicochemical parameters of water. Meskiana alluvial aquifer is mainly composed of sandy, sandstone and conglomeratic materials with some passages of relatively thin clay layers. It is limited to the north east by diapiric formations, the most important part of its recharge comes from the carbonate formations of the borders. Meskiana plain characterized by simple tectonic structure,the general direction of folding is South-west North-east, as to the climatic predominant in the area is semi-arid The chemical quality of water is poor resulting from the strong salinity influenced by the lithology of the aquifer and the climatic factors (precipitations and the temperatures). Pollutants originating from agriculturalactivities and urban wastes are also present. The results obtained from this study agree perfectly with the questions raised in theproblematic.