The exploitation of the Shenfu-Dongsheng coalfield caused a large amount of disturbed lands

leading to anthropogenic soil and water loss.In this study

we investigated hydrodynamic features of the water flows through carrying out scouring experiments in the field.The results indicate that the relationship between the velocity of flow and the discharge could be well described by a power function.The flow velocities increased firstly from the upper section to the middle and then decreased from the middle section to the bottom section on the slope.The state of the flow was turbulent flow

suggested by a power function between the Reynolds number and the discharge.The values of the Froude number varied between 0.59~0.88

resulting in subcritical flows.The resistance coefficients increased with the slope gradients.The relationship between the flow shear stress and the discharge followed a power function

same as the relationship between the flow powers and discharges.They both changed great with the slope changing great.