Overland water flow can detach exposed soil and transport it over large distances, leading to soil loss and sediment deposition across landscape. Soil erosion can be effectively controlled by modifying topography to reduce concentrated overland flow or by planting vegetation to reduce soil detachment and transport. We used Tangible Landscape to analyze distribution of soil erosion and deposition potential in a small watershed and to design conservation measures by changing topography and planting vegetation in vulnerable locations. We iteratively adjusted and optimized our design based on real-time feedback from erosion and deposition maps projected over the modified 3D model. This feedback helped us to evaluate the effectiveness of our designs and develop better solutions.