The hydraulic characteristics and flow energy consumption of runoff on steep slope woodland were studied under accelerated erosion condition with simulated rainfalls. The results show that the natural soil surface had a significantly effect on reducing flow velocity

which remained very slow as 0.05 to 0.09 m/s. The flow velocity increased under manmade accelerated erosion. Furthermore

the increasing amplitude was greater on the lower slope position than the upper one. The Reynolds number Re of the runoff on natural soil surface of the woodland was 160.8

which can be recognized as laminar flow. Under manmade accelerated erosion

the flow shifted to a transition state between laminar and turbulent flow condition. Compared with natural soil surface

the Froude number Fr of the middle and lower slope position with litter removal in-creased by 114.9%~245.1% and 322.2%~1 012.9%

and the friction coefficient f increased by 5.2%~90.6% and 42.6%~270.3%

respectively. The flow velocity on the bottom and mid-lower slope sections were rapid with Fr＞l

and slow on the upper and mid-upper slop sections with Fr＜1. The treatment of till-age increased Fr and f by 181.6G~72.3G and 41.3%~66.80% on the bottom

mid-lower and mid-upper slope sections. In the upper section

Fr decreased by 67.3~ while f increased by 8 times. The potential en-ergy of the surface flow was greater than kinetic energy

the kinetic energy level of the flow was low in early stage of simulation rainfall and then increased and finally stabilized over the experiment time. Compared with the natural soil surface

the energy consumption of the slope surface increased in all the treatments of forest litter removal

cutting above ground parts and tillage. The intensity of soil erosion was closely related to en-ergy consumption of the slope surface.