Large-scale rainfall simulation is used to evaluate the performance of erosion control practices under varying rainfall conditions. The Auburn University Erosion and Sediment Control Test Facility (AU-ESCTF) has developed a large-scale rainfall simulator following the ASTM D6459 requirements. The designed storm event exposes the test slope to three sequential 20-minute rainfall intensities of 51, 102, and 152 mm/hr (2, 4, and 6 in/hr). The flour pan method was used to determine the drop size distribution and the total kinetic energy produced by the rainfall simulator. The rainfall data, soil loss data, and the Revised Universal Soil Loss Equation (RUSLE) were used to calculate the erosion control product C-factors.
Learn how to determine the drop size distribution of a rainfall simulator.
Learn how to determine the total kinetic energy for an ASTM D6459 test.
Learn how to calculate a C-factor for erosion control product under rainfall simulation testing.