The impact of transverse grass strip distribution patterns on slope erosion and hydrodynamic mechanisms
Liang, Yiwen ， Feng, Sijia ， Li, Ke
2026-05-07 FRONTIERS IN ENVIRONMENTAL SCIENCE 2026 14(卷), null(期), (null页)
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Vegetation distribution patterns are key drivers of surface runoff and soil erosion in arid and semi-arid regions. However, quantitative studies on the parameterization of Transverse Grass Strip Combinations (TGSC) patterns are still scarce. Through controlled movable-bed erosion experiments conducted under a fixed 50% vegetation cover, we quantified the effects of different TGSC patterns on slope hydrodynamic characteristics and erosion rates under various slopes and flow conditions. Results show hydrodynamic parameters and slope erosion rate increase with the increase of slope and flow rate. In addition, the TGSC significantly reduced slope erosion, and there was a significant power-law relationship between erosion rates and hydrodynamic parameters (with flow rate exponent being the best indicator). We further parameterized TGSC patterns based on the Path Connectivity Index (PCI), developed and validated a high-performance erosion prediction model, and identified a critical grass strip width threshold of 0.3 m to achieve optimal erosion control. This study provides theoretical support for vegetation-based soil and water conservation in arid and semi-arid regions.
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