An experimental investigation of rill erosion processes in lateritic upland region: A pilot study

Abstract

The present paper is based on field investigation and measurement of rill erosion processes at Rangamati Experimental Station (Medinipur, West Bengal in India). In rill experiments, three different natural rills were studies in field for understanding of the dynamics of soil erosion processes of a rill catchment area. Geometric and morphological characteristics of each rill catchment area were analyzed. Results showed the widening, deepening and extended of rills because of sidewall sloughing, knick-points and head-ward erosion during surface runoff process. Progressive increases of rill volume were observed in the upper, middle and lower catchment with the change of time. Rill area has increased by runoff processes of 4.2 % and 6.8 % for Rill-A and Rill-B respectively. These processes are depends on surface coverage, soil texture, slope gradients and runoff velocity.

Evaluating the Effectiveness and Adoptability of Mulching Technology to Control Soil Erosion: Case Study of the Nyabugogo Catchment in Rwanda

“…Natural factors like the slope of the terrain (25.7%) and rainfall coupled with runoff (28.5%) emerge as predominant natural influential factors of soil erosion. Several studies have identified these factors as the primary causes of soil erosion (Belay and Mengistu, 2019); Leta and Megersa, 2021), while (Shit et al, 2015) confirmed that heavy rainfall and steep slopes were the primary and secondary causes of soil erosion, respectively. Additionally, the scarcity of land for farming and settlements is a significant factor contributing to the deforestation in the Nyabugogo drainage area (IWRM, 2017).…”