Runoff generation in Kerosene and Gas Oil contaminated soils

Quantitative evaluation of the effects of petroleum contaminated soils on soil physical properties is required for optimal soil and water resources management. The objective of this study was to investigate runoff generation in Kerosene and Gas Oil contaminated soils. For this purpose، the variables of runoff commencement، runoff coefficient، variation of runoff duration time and cumulative runoff were determined in contaminated soils. The experimental treatments were consisted of two concenterations of Kerosene and Gas Oil.. The results indicated that Kerosene and Gas Oil contaminated plots had a significant influence in reducing the runoff commencement. So that، the runoff commencement at non-contaminated plot was occurred 128 seconds later than other contaminated plots. However، different type of petroleums with same quantities had no significant influence on the runoff commencement. In addition، the maximum runoff coefficient was obtained at higher concentration of contaminants. The results further indicated that the runoff coefficient in contaminated plots was about 3 to 3. 5 times larger than that of non-contaminated plots. All the contaminated plots had a significant influence in increasing the cumulative runoff compares to non-contaminated plots.