HYDRAULIC MODELING OF LOCAL SCOUR IN COHESIVE SOILS DOWNSTREAM OF HYDRAULIC STRUCTURES

This study presents an advanced hydraulic calculation method for predicting local scour in cohesive soils downstream of hydraulic structures. The approach integrates probabilistic theory, soil mechanics, and experimental hydraulics. Laboratory experiments were carried out under controlled hydraulic regimes to determine non-eroding velocities, critical flow parameters, and scour geometry. The results demonstrate that erosion resistance in cohesive soils depends on both hydraulic forces and soil physicochemical properties. A refined algorithm is proposed and validated against experimental data, showing strong agreement and practical applicability.