Quantitative assessment of groundwater resources in Quchan-Shirvan plain by using GIS

In the recent years، using GIS is considered in different field، including ground water researches. At present، this technique is wildly applied in modeling and zonation of ground water resources due to high efficiency، economic reason and saving time. In this research، GIS method has been used for the assessment of ground water resources in Quchan - Shirvan plain by using two quantity models which developed by Kamaraju et al. (1996) and Krishnamurthy et al. (1996). For this purpose different maps such as slope، topography، drainage density، geology، soil type and geomorphology maps are provided. The assessment of the mentioned methods was done by calibration the models based on the discharge rates of the available data from drilled wells in the study area. The result shows there is a good agreement between the well discharge data and the Krishanamurthy method. It seems that the main reason for this agreement is that the data using in this model is more than the data using by the Kamaraju method. In this paper quantity map of ground water resource is provided by using the Krishanamurthy method. This map shows that the best potential of ground water sources can be found around Farouj city.