Effect of depth of fuel oil addition levels on water penetration in soil columns of different textures

Abstract

 The experiment was conducted in the laboratory, plastic column (Plexiglas) and its length is 55 cm was used. The soil was packed to height 50 cm and was used a special technique to pack the soil. The fuel oil was applied at two depths, the first was spraying on the surface and the second at 25 cm depth. A water constant head was 3 cm and maintained throughout the duration experiment. The ponded water depth was measured in soil column over time and the advanced wetting front was also measured. The infiltration readings was taken for columns, for two types of textures and for two depths with fuel oil treatment until reaching to the bottom of soil column at a depth50 cm. The surface application led to increasing time which took for reach to end of the column at concentration 4%. On the other hand, the time under subsurface application took longer to reach to end of the soil column with compare to surface application. Both the surface and subsurface additions led to a better fit for the cumulative ponded water depth with time.