Investigation about factors of ground water salinity in modeling of ground water salinity on the coasts of Mazandaran Province

Nowadays، water resources provision with proper quality is one of the important needs. Additionally available water quantity، water resources pollution and water quality are problems about water provision. This research has been done to investigate the factors of ground water salinity and to present a model for estimating groundwater salinity on the Caspian southern coasts. So، these data were provided: water qualitative experimentations in this area، annual precipitation and evaporation، groundwater depth، surface water salinity، aquifer transmissivity، topography and distance from Caspian Sea. Then، Multivariate Regression method was used by using SPSS software. In this stage، groundwater EC has been entered qua a variable for water salinity or dependent variable and ground water salinity factors have been entered qua independent variables. A linear model and a non-linear model were presented. Then، resultant models efficiency were considered by using these models in the areas that (east of Mazandaran province) their data were not used to present resultant models. Finally، groundwater EC average map was provided by using the presented non-linear model and Geographic Information System in the east of Mazandaran province.