Overland erosion due to freezethaw cycling
thawed. Both the C and FT bins were sealed to minimize gain or loss of soil
moisture during the FT cycle. The FT and C bins were then placed side-by-side
in the CRREL soil-erosion simulator and elevated to the same slope (Fig. 2).
Equal incoming clear water entered the bins through pipes about 1 inch above the
soil in each bin. Water discharged from the bins through V-shaped weirs (Fig. 3).
Figure 2. Soil bins in the CRREL soil-erosion simulator being set to the
selected slope. Note the discharge-receiving reservoirs below and to the
right of the bins.
Figure 3. Rills formed in the C (left) and FT (right) bins.