Water Erosion Risk Model
Determine which of the following particles make up the majority of the soil (if any): sand, silt, clay: the choice of loam indicates that the soil is composed of roughly equal amounts of clay, silt, and sand. This field can be autofilled via the Autofill button, in the U.S.
Rock Content (%)
The amount of rocks visible on the surface of the hillslope. This field can be autofilled via the Autofill button, in the U.S.
Slope Length (ft)
The horizontal change in the position from the bottom to the top of the hillslope, in feet.
Slope Gradient (%)
The slope is the change in vertical position over the change in horizontal position from the bottom of the hillslope to the top. The slope gradient is the percentage of slope, or slope x 100. This field can be autofilled via the Autofill button, in the U.S.
Choose the best description of the vegetation concentration of the hillslope.
Thin or young forest
Low severity fire
High severity fire
Describe the percentage of the hillslope soil, which is covered by natural ground covering (vegetation, dead plant material, rocks, etc.). The coverage of a hillslope can be estimated by taking 20 steps accross the hillslope and counting how many times you step on natural ground covering.
Select the location, which is closest to you. The list is of climate stations, each of which is defined by the location of the station.
CHARLESTON KAN AP WV
DENVER WB AP AL
FLAGSTAFF WB AP AZ
MOSCOW U of I ID
MOUNT SHASTA CA
SEXTON SUMMIT WN OR
Years to run
Input the number of years between 1 and 200, for which to run the model.