Using PCA and ANN in the explanation of groundwater chemism. Case of the Messaad Plateau. South Algerian Steppe Region

The objective of this work is to study the chemistry groundwater in messaad plateau which located 300km south capital Algiers. results obtained showed that waters are very strongly mineralized overall, with a predominance calcium sulphate facies and chloride facies. high degree mineralization South South-East part area near Oued Messaad. Principal Component Analysis (PCA) has shown increase mainly due dissolution evaporative mineral-rich salt-bearing formations. hydro-chemical model based on Artificial Neuron Networks (ANN) multilayer perceptron (MLP) type SO4 2-,Cl- ,Ca2+,Na+ ions most important factors influencing electrical conductivity water. These result gypsum halite continuously clays marls Barremian