摘要：Groundwater is one of the important and prime sources of drinking water supply in Sylhet district (aregion of Bangladesh). Iron is one of the abundant pollutants that exist significantly in this region’sgroundwater. Here, the study signifies the spatial distribution of iron concentration across the wholedistrict of Sylhet by using different geostatistical methods on the basis of collected data from 351groundwater wells. The variation in the concentration of iron in Sylhet district is represented by usingGeographic Information System (GIS), an effective tool used for mapping purpose. On the basis ofGIS, ordinary kriging method is executed here for the estimation of groundwater iron concentration.Iron concentrations represent a normal distribution, as well as cross validation errors are within thesatisfactory level. Among the five models (Spherical, Gaussian, Exponential, K-Bassel, J-Bassel)introduced by kriging in this study, the experimental variogram of groundwater iron concentration wasbest fitted by exponential model. The highest concentration is found in the mid region of Sylhet districtas the geostatistical map signifies. Another key reason revealed from the study that, the greater theelevation of the ground surface, the higher the concentration of iron.
关键词：Groundwater;
Iron concentration;
Geostatistics;
Ordinary kriging
