Laserfiche WebLink
C (cropping - management) factors are the ratios of soil losses from lands cropped under specified <br />conditions to the corresponding losses from tilled, continuous fallow. C factors for land uses other than <br />cropland are shown on Figures 7,8, and 9. The percent ground cover is the primary item to consider <br />because a slight change in the percent ground cover will result in a significant change in the erosion <br />prediction. <br />Figure 7 - "C" Factors for Permanent Pasture and Rangeland <br />ADJACENT AREA - "C" FACTOR <br />RECLAIMED AREA -"C" FACTOR <br />Adjacent Area <br />Appreciable brush. Canopy is assumed to be the cover contributed by trees and shrubs. Based on the <br />Harner and Associations Vegetation Inventory the shrub & tree cover totals 43.7%. The percent ground cover <br />at the surface for the adjacent area shown above is 15.7%. Use figure 7 identified above and interpolate <br />to determine the C factor for 15.7% cover. <br />CANOPY I APPRECIABLE CANOPY <br />PERCENT GROUND COVER <br />0.0% 15.7% 20.0% <br />25% 1 G 0.360 0.211 0.170 <br />43.7% Adjacent "C" 0.171 <br />50% IG 0.260 0.158 0.130 <br />East Mine (Reclaimed) <br />No appreciable canopy. Canopy Is assumed to be the combined cover contributed by trees and shrubs. <br />Based on the 2016 Vegetation Evaluation the combined tree and shrub cover totals 0.33%. The percent <br />ground cover for the reclaimed area shown on the preceding page is 66.9%. Use figure 7 identified above <br />and interpolate to determine the C factor for 66.9% cover. <br />CANOPY NO APPRECIABLE CANOPY <br />PERCENT GROUND COVER <br />60.0% 66.9% 80.0% <br />No IG 0.042 0.032 0.013 <br />appreciable <br />canopy <br />TR -62 Volume 8A - 11 10/16 <br />