Thank you 19. Based on the following factor information below: LOCALE Las Vegas,
ID: 116579 • Letter: T
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Thank you 19. Based on the following factor information below: LOCALE Las Vegas, NV Richmond, VA Charleston, Sc C FACTOR 1.2 0.8 0.7 P FACTOR 0.5 0.5 0.5 R FACTOR 200 400 K FACTOR LS FACTOR SlopeLength(muull Degree of Slope 1.8 Organic Matter Content (%) -ULS.Soll Loss Factor 250 0.2 0.5 0.16 Fne Sand 0.14 0.10 150 5.4° 1.5 Loamy Sand Loamy Very Fine Sand Sandy Loanm Very Fine Sandy Loam 012 0.10 0.06 110 2.5 027 0 24 0.19 90 12.6 0.48 0.42 0.33 0.32 50 162 4.5 Gn Clay Loam 0.37 0 26 what is the average annual soil loss for portions of Las Vegas, NV (loamy very fine sand, 0.5 % organic matter), Richmond, VA (sandy loam, 2% organic matter), and Charleston, SC (loamy sand, 2% organic matter). Assume you are examining an area with a 200 m length slope of 3.6 degrees for all locales. Your answers will be in tons/hectare. (6 pts) a. Which, if any, of these areas exceed the "tolerable soil loss" range we discussed in class? Why do you think that might be? (3 pts b. c. How would impervious surfaces affect rates of soil erosion? (3pts)Explanation / Answer
a)
Annual soil loss for las vegas (loamy very fine sand , 0.5% organic matter) = R*K*LS*C*P
R = R factor = R factor for las vegas = 8
Here K = K factor (Loamy very fine sand , 0.5% organic matter ) = 0.44
LS = LS factor for 200 m length and 3.6 degree slope = 0.4
C = C factor for las vegas = 1.2
P = P factor for las vegas = 0.5
Annual soil loss for las vegas (loamy very fine sand , 0.5% organic matter) A = 8*0.44*0.4*1.2*0.5 = 0.84 tons/hectare.
Annual soil loss for Richmond VA (sandy loam , 2% organic matter) = R*K*LS*C*P
R = R factor = R factor for Richmond VA = 200
Here K = K factor (sandy loam , 2% organic matter ) = 0.24
LS = LS factor for 200 m length and 3.6 degree slope = 0.4
C = C factor for Richmond VA = 0.8
P = P factor for Richmond VA = 0.5
Annual soil loss for Richmond VA (sandy loam , 2% organic matter) A = 200*0.24*0.4*0.8*0.5 = 7.68 tons/hectare.
Annual soil loss for Charleston SC (loamy sand , 2% organic matter) = R*K*LS*C*P
R = R factor = R factor for Charleston SC = 400
Here K = K factor loamy sand , 2% organic matter ) = 0.12
LS = LS factor for 200 m length and 3.6 degree slope = 0.4
C = C factor for Charleston SC = 0.7
P = P factor for Charleston SC = 0.5
Annual soil loss for Charleston SC (loamy sand , 2% organic matter) A = 400*0.12*0.4*0.7*0.5 = 6.72 tons/hectare.
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