Investigation of Spatial and Temporal Changes in Groundwater Level of Khorramabad Plain Using Geostatistical Method (During a 10-Year Statistical Period: 2004 to 2014)

Much of Iran is dry and poor water, and the water required by villages, industries and cities is used by groundwater sources. Excessive groundwater harvesting in many parts of the world has caused a severe drop in groundwater levels. Therefore, this study was conducted to investigate the spatial and temporal variations of groundwater level in Khorramabad plain over a ten year statistical period (2004-2014) using the best method, geostatistical estimator. In this regard, firstly, the available groundwater statistical data were collected and various conventional and simple kriging and IDW (RBF) methods with Gaussian, exponential and circular models were used. The mediation method was performed using two criteria (ME, RMSE). Then their location maps were plotted in Arcmap 10.3. The results showed that the multi-quadratic photo-distance method (RBF) is the best groundwater interpolation method in 2004 and 2014.