investigating the relationship of precipitation, humidity, evaporation and ground water level fluctuations of dehgolan's aquifer

qorveh – dehgolan aquifer is one of the ground water resources in kurdistan. increase in pumping of water has dropped water table level significantly. this study considers the relationship of fluctuations in precipitation, humidity and evaporation with ground water table level. after preparing the base map and the rainfall data accuracy, isohyetal map of basin was drown. based on isohyetal map, long-term precipitation and other climatically elements were prepared. through the review of precipitation fluctuations, normal, dry and wet cycles were determined. isopiestic map for each period and each year in gis environment was calculated by thiessen method. accompanying with spatial and time fluctuations, there were analyzed statistical correlations of variables fluctuation in the climate periods. results show that considering the significant mean differences between variables in different levels of time, the climatically periods are recognizable and aquifer water level has been more affected by rainfall in 1-3 year periods in comparison to the periods of more than 3 year. climate elements change (evaporation and rainfall) cause significant fluctuations in groundwater levels. in dehgolan flat rainfall change impacts on groundwater fluctuations is more effective than in qorveh flat.