Author(s): Seung Sook Shin; Seok Jae Yoon; Min Seo Kim; Jong Il Chio; Boram Hong; Sang Deog Park
Linked Author(s): Seung Sook Shin
Keywords: Rill erosion Herbaceous coverage Sediment yield Effective energy
Abstract: Rapid regeneration of the herbaceous layer on disturbed steep slopes contributes to the control of rill development. This study analyzed the changes in rill development and sediment yield due to rill erosion in response to the herbaceous plants growing on steep slope with sandy soil. The effective energy, the sum of the effective kinetic energy of rainfall and effective potential energy of surface runoff, was considered to evaluate rill erosion on steep vegetated hillslopes. The sediment yield increased exponentially with increasing surface runoff, but the relationship show a low correlation due to herbaceous effect. As the rill development became more active, the rill volume increased, which was the main reason for the increase in sediment discharge. The increase in herbaceous cover reduced surface runoff, reduced the conveyance capacity of the rill, and ultimately contributed to the reduction in sediment discharge. The effective energy showed high determination coefficients in the relationships with sediment under various vegetation cover.
Year: 2025