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 included 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 />Harper and Associations Vegetation Inventory the shrub cover totals 30.1 %. The percent ground cover <br />at the surface for the adjacent area shown above is 66.2%. Use figure 7 identified above and interpolate <br />to determine the C factor for 66.2% cover. <br />CANOPY I APPRECIABLE CANOPY <br />PERCENT GROUND COVER <br />60.0% 63.1% 80.0% <br />25% G 0.038 0.034 0.012 <br />30.1% lAdjacent "C" L033JI <br />50% G 0.035 0.031 0.012 <br />West Mine <br />No appreciable canopy. Canopy is assumed to be the combined cover contributed by trees and shrubs. <br />Based on the 2013 Vegetation Evaluation the combined tree and shrub cover totals 0.6%. The percent <br />ground cover for the reclaimed area shown on the preceding page is 77.8%. Use figure 7 identified above <br />and interpolate to determine the C factor for 77.8% cover. <br />CANOPY I NO APPRECIABLE CANOPY <br />PERCENT GROUND COVER <br />80.0% 77.8% 95.0% <br />NoftA'a:cent <br />0.013 0.014 0.003 <br />appreciable "C" Factor 0.014 <br />canopy <br />Run -of -Mine <br />No appreciable canopy. Canopy is assumed to be the combined cover contributed by trees and shrubs. <br />Based on the 2013 Vegetation Evaluation the combined tree and shrub cover totals 0.4%. The percent <br />ground cover for the reclaimed area shown on the preceding page is 75.4%. Use figure 7 identified above <br />and interpolate to determine the C factor for 75.4% cover. <br />CANOPY NO APPRECIABLE CANOPY <br />PERCENT GROUND COVER <br />80.0% 75.4% 95.00/ <br />No G 0.013 0.016 0.003 <br />appreciable liAdjacent "C" Factor 0.016 <br />canopy <br />TR -58 AA"WO' Volume 8A - 4 03/14 <br />09 Jiln•zO19 <br />