Ataollah Kavian; Atta Safari; Aidin Parsakhoo
Abstract
In this study, the sediment yield of forest roads of Darabkola watershed was investigated andestimated using WARSEM and SEDMODEL. Rainfall simulator was applied to measure thesediment of abovementioned roads directly. In order to apply WARSEM and SEDMODEL models,field operations for measurement of different ...
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In this study, the sediment yield of forest roads of Darabkola watershed was investigated andestimated using WARSEM and SEDMODEL. Rainfall simulator was applied to measure thesediment of abovementioned roads directly. In order to apply WARSEM and SEDMODEL models,field operations for measurement of different parameters including road length and width, heightand coverage of road cut-slope, road longitudinal slope, shape and configuration of the road, roadsurface, and etc. were carried out in 63 different segments of the path of forest roads in the studyarea as 11979 meters long. Then sediment yield of roads was measured by rainfall simulator withnozzle of 3 meters high and plot of 2 square meters. Results of the WARSEM and SEDMODLmodels and rainfall simulation showed that sediment yield of forest roads are equal to 9.918, 5.109,and 4.141 kg/m2/year, respectively. Results also showed that there was no significant differencebetween sediment yield of rainfall simulation and SEDMODEL at significance level of %95. It wasalso revealed that SEDMODL is more suitable for estimating sediment yield of forest road withvalues of RD, MD, BIAS, RE and RMSE equal to 21.42, 4.54, 0.04, 17.59 and 0.71, respectively.
