Penggunaan fungsi pedotransfer untuk memperkirakan permeabilitas tanah di Sumatera Selatan dan Riau rn[Using pedotransfer function to prediction of saturated hydraulic conductivity at South SUmatera and Riau]

The experiment was conducted to predict saturated hydraulic conductivity at South Sumatera and Riau from soil particles distribution, porosity and horizon median depth. Saturated hydraulic conductivity is one of soil physics properties for predicting the water movement and dissolved in the water through the soil. Most of the saturated hydraulic conductivity which analysed on laboratory was impractical, and requires a lot of cost and time. Saturated hydraulic conductivity is related to clay content, porosity adn median depth horizon. In this study 78 set of soil samples were taken from South Sumatera and Riau from May 2012 until June 2013 using permeameter. The result showed approximately success in predicting saturated conductivity from clay content, porosity median depth soil horizon (R 2 = 0,675): Log Ks = -7,245 + 0,077 clay + 0,084 porosity - 0,011 median depth horizon. Where in this equation clay are fraction from particle size distribution, porosity are total porosity from soil structure and median depth are the middle depth of each soil horizon, and Log Ksat, saturated hydraulic conductivity expressed in cm/h. The result of regression analysis showed that clay content play more significant role with respect to Log Ks, saturated hydraulic conductivity and has been named as the effective parameter in Log Ksat calculation.