Saltwater and freshwater interference by using Verruijt, Geo electric and geo-electromagnetic in Coastal Aquifer, Nur, Mazandaran

Coastal areas of groundwater reserves are of great importance for the management and proper planning in these areas, it is necessary to assessment the state of the aquifers. In this study were study the interaction of fresh and salt water levels in Nur subsections. In this section study was selected the coastal line with a length of 3000 m. The distance between the points of study in the 500 lengths of shoreline is 50 meters, then 100, 200, 300, 400, and 500 meter respectively. To determine the interaction of fresh and salt water were used from equation Verruijt, geophysical, electromagnetic devices and observational data. To the implementation of Verruijt equation necessary parameters were prepared, and interface between freshwater and saltwater were determined using this relationship in May and August. Also geo electric studies using the Mazandaran Regional Water Company information and exploratory wells were investigated. In order to provide information about interaction of fresh and salt water using electromagnetic devices were conducted interface sampling in point studies and the values were recorded. In the study sections to compare the results of studies were used observational data. The results showed that electromagnetic device is very accurate in compared to other methods of study and with use of this device can be determined interfere between fresh and salt water with high confidence.