Spatiotemporal Variability of Ground Water Using Geostatistic

Over centuries, ground water has been an important source of water. So, awareness about its temporal and spatial variability, in different zones, is necessary, and Geostatistics is a vital technique for this purpose. In this study, 76 wells (water year of 1382-1383) and 71 wells related to Gonabad plains were prepared and their descriptive statistic, trend and semivariogram were separately evaluated for each season. Then, prediction maps were organized. Temporal variability of water table for each season and its spatial variability for different places were calculated. South-north trend and southeast-northwest anisotropy were observed for all seasons. Every season except winter had exponential model with major and minor range of 20 and 15 km, respectively. Winter in different years had spherical model with major (23 to 28 Km) and minor (15 km) range too. The highest uncertainty belonged to some places that have the greatest distance from each other