Soil erosion and sedimentation reduce the diversity of the natural environment. When soil is eroded and sedimentation occurs, important nutrients are carried away from the soil. The scientists in this study wanted to find a way to predict how much erosion would be caused by unpaved roads. Note: In earlier Natural Inquirer articles like this one, the Discussion section is called “Implications.” Topics: Engineering and Forest Products, Pollution, Water, Computer Modeling, Erosion, Road Engineering, Sedimentation, Soil.