Soil erosion on steep hills with varying vegetation patterns.

This article focuses on an experimental investigation into how varying vegetation densities and patterns affect soil erosion rates on hilly slopes in northern Pakistan. Using a controlled laboratory flume model, the study examined erosion under different slopes (10°, 15°, and 20°), flow conditions characterized by Froude numbers (Fr = 0.17 and 0.20), and vegetation densities measured by the ratio G/d (gap between vegetation elements to diameter). Results indicate that denser vegetation (G/d = 1.09) and modified vegetation patterns significantly reduce erosion rates compared to sparse or regular patterns, with erosion increasing notably on steeper slopes and higher flow velocities. The findings suggest that strategically arranged vegetation can serve as an economical and environmentally sustainable method for mitigating soil erosion and slope instability in mountainous regions prone to flooding.