Spatial analysis of the physical and chemical properties of groundwater in the south and southwest of Dalaki basin, Bushehr Province

Spatial monitoring of the physical and chemical properties of groundwater to maintain and improve their quality is a crucial issue in hydrological studies. Hence, in this study, the spatial structure of groundwater sources and their physical and chemical properties in one of the most important southern basins of Iran, Dalaki basin in Bushehr Province, are studied using Geostatistics and variogram analysis. The research data were collected and analyzed to determine chlorine, calcium, sodium, sulfate, total solids and magnesium in a sample of 109d stations in 2016. Variograms were used for the spatial variability of the studied parameters. To map those parameters, ordinary Kriging procedures were practiced to evaluate the circular, exponential, Gaussian, spherical and rational quadratic models in this regard. As the results showed, the high values of parameters are located in the west and southwest of the study area. They begin to decline toward the east. This may be attributed to non-normative agriculture and the consequent decrease of the groundwater in this area.