A field scouring experiment on soil erosion and sediment yield on unpaved roads was conducted to provide scientific date for predicting and controlling soil and water loss on unpaved roads. Results indicated that the variation of sediment yield appeared in three types,which were smooth,multimodal,and unmoral distribution on the condition of combination of same slope with different runoff discharges,or same discharge with different slopes. Spatial variation of sediment yield with slope profile could be showe...
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