The statistical variation among rockfalls is modeled by randomly varying the angle at which a rock impacts the slope within limits set by rock size and slope irregularities. Empirically derived functions relating velocity, friction, and material properties are used to model the dynamic interaction of the rock and slope. The model applies equations of gravitational acceleration and conservation of energy to describe the motion of the rock. CRSP uses numerical input values assigned to slope and rock properties to model rockfall behavior. The basic theory behind CRSP is summarized, and the results of recent program modifications and calibration are discussed. The Colorado Rockfall Simulation Program (CRSP) was developed to provide a statistical analysis of probable rockfall behavior at any given site and to be used as a tool to study the behavior of rockfalls, to determine the need for rockfall mitigation, and to aid in the design of rockfall mitigation. ROCKFALL HAZARD ANALYSIS USING THE COLORADO ROCKFALL SIMULATION PROGRAM
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