 Research has shown that the risk of flooding, debris flows and mudflows are significantly increased with increasing rainfall intensities and burn severity and that some risk reduction treatments help for low but not high intensity rainfall events.Mulches, erosion cloth and seeding retard overland flow and protect soil from rain drop impact and increase soil moisture holding capacity.Landscape structures (e.g., log erosion barriers, contour trenches, straw wattles) trap sediment and prevent slope rilling.