Waste grassland is the main native ground type in the project of Banduo hydropower station of the Yellow River. Description of runoff processes in the area can reveal and estimate soil erosion processes and its degree. Based on field scouring exper iments

runoff processes on waste grassland were studied and following results were obtained: (1) For different water supply discharges and the same slope

runoff yield varied with runoff process could be described by a logarithmic equation. ( 2) Runoff processes on waste grassland varied with flow rate on different slopes and at the same water supply discharge were similar to those at dif ferent flowrates. They both increased with souring time and then reached a stable state. ( 3) A log arithmic equation can be used to describe runoff depth varied with runoff process under different flow rates. Runoff depth increased with increased flow rate.(4) On different slopes

runoff depth on waste grassland increased when slope increased and the relationship can be described by a pow er equation. ( 5) Runoff depth on waste grassland changed with slope and flow rate and it can be described by a duallinear equat ion. Flow rate had a great effect on runoff depth than slope.