soil erosion
Description
We conducted moving-bed runoff scour experiments, primarily focusing on three variables: discharge, hydraulic gradient, and the width of the transverse grass strip. In this study, we selected three gradients of 5°, 10°, and 15°, and three flow rates (15, 22.5, and 30 L/min). Given that the transverse strip pattern (BP) is more effective in retaining sediment through detention, and that a vegetation cover of approximately 50% was determined to be the most effective configuration for reducing soil erosion. Therefore, while maintaining a constant forage coverage of 50%, the number and width of grass strips were varied to establish five transverse grass strip combinations: one 2.4 m wide (2.4 m TGSW), two 1.2 m wide (1.2 m TGSW), four 0.6 m wide (0.6 m TGSW), 8 strips 0.3 m wide (0.3 m TGSW), and 16 strips 0.15 m wide (0.15 m TGSW). A bare slope (BS) was established as a control group for comparative analysis. The study investigated the water and sediment regulation effects of transverse grass strip widths under different hydrological conditions.