coalbed methane (cbm) plays an important role in coal mining safety and natural gas production. in this work, the cbm potential of b2 seam in parvadeh iv coal deposit, in central iran, was evaluated using a combination of local regression and geostatistical methods. as there were 30 sparse methane sampling points in the parvadeh iv coal deposit, no valid variogram was achieved for the methane c...

within-field variation of wheat yield and spatial pattern of weed density and soil nitrogen were evaluated by geostatistical methods. samples were taken from a 90×120 m area located in a 3.8 ha wheat field. soil nitrogen content and weed density at tillering and wheat yield at maturity were measured in 1 m2 plots located at the center of 10×10 m grids. grain yield was varied between 1.5-4.9 t h...

drought has different effects on human life and livelihood groups.this study the characteristics of drought and the zoning was done in the zanjan province is the kriging model than phenomenon to the effects of drought on the rural site selection consideration.drought has different effects on human life and livelihood groups.this study the characteristics of drought and the zoning was done in th...

in this study, the effects of long term use of urban wastewater (over 40 years) on soil salt content and related parameters were evaluated in the lands south of tehran. for this analysis, kriging methods were tested. according to the suitable model indices, ordinary kriging (ok) was suitable for ph, clay, na+, mg2+ and sodium adsorption ratio (sar) interpolation; log-normal kriging (log-normal ...

This research studies the spatial distribution quality of interpolation methods. The aims first to obtain unbiased estimator parameters based on regionalized variables in study field. We used kriging techniques (called Local interpolation) rely variogram function with a fuzzy inference system, where is an extension ordinary kriging. second objective this work estimate covariance models real dat...

The corrosion degradation of the steel sheet pile material accelerates in recent years. extremely accelerated induces thickness loss and decreases mechanical characteristics. It is essential to evaluate corroded situations for design maintenance infrastructures. In this study, spatial characteristics service canals were evaluated by geostatistics with variogram kriging. experimental procedures,...