Slope stability. Consider a long linear hillslope with a slope angle of 25°. It has soil that is 1 m thick, and a shear test on the soil reveals its internal angle of friction is 31°, a cohesion (including roots) of 5000 Pa, and a porosity of 35%. Perform a stability analysis on this slope for the worst case scenario of full saturation. If you find that it is indeed unstable under full saturation, assess the water table height that is required to cause failure.