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Exam (elaborations)

CPESC Exam Study Guide.

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CPESC Exam Study Guide. RUSLE evaluates - answerannual soil loss A=R*K*LS*C*P The R value comes from - answerisoerodent maps A=R*K*LS*C*P The K value comes from - answerTable-Soil Erodibility Factor A=R*K*LS*C*P The LS value comes from - answerTable-Topagraphic factor, high ratio of rill to in...

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  • September 29, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CPESC
  • CPESC
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CPESC Exam Study Guide.


RUSLE evaluates - answer✔annual soil loss


A=R*K*LS*C*P The R value comes from - answer✔isoerodent maps


A=R*K*LS*C*P The K value comes from - answer✔Table-Soil Erodibility Factor


A=R*K*LS*C*P The LS value comes from - answer✔Table-Topagraphic factor, high ratio of

rill to interill erosion


A=R*K*LS*C*P The C value comes from - answer✔Table-Cover Management Factors


A=R*K*LS*C*P The P value comes from - answer✔Table-Practice Factor


A=R*K*LS*C*P The units for A are - answer✔tons/acre/year(so you have to multiply by acre to

get tons/year)


M is the - answer✔Adjustment Factor for Estimating Monthly & Portions of Annual Soil Loss


Convert M% to tons - answer✔.0% * A tons


How many cubic yards of soil will be lost - answer✔Use table-estimated Weight of Soils, then

convert the units or * A


how many pounds = 1 ton - answer✔2,000

, ©BRAINBARTER 2024/2025


How many cubic feet in a cubic yard? - answer✔27


Soil loss using Erosion Index % GRAPH - answer✔Future %-Past %=% then .0% x A


A is - answer✔annual soil loss


A=RKLSCP - answer✔RUSLE


T=95(V*Qp)^0.56 KLSCP - answer✔MUSLE


T=95(V*Qp)^0.56 KLSCP T is - answer✔sediment yield in tons for a storm event


T=95(V*Qp)^0.56 KLSCP V is - answer✔volume of runoff for the storm event, ac-ft


T=95(V*Qp)^0.56 KLSCP Qp is - answer✔Peak flow for the storm event, cfs


RCN comes from - answer✔tables: Weighted Runoff Curve Numbers


weighted RCN= - answer✔RCN*acres + RCN*acres....../total acres


# pure nutrients needed /acre? * acre?= - answer✔nutrient %/100 * # mix


# pure live seed= - answer✔#mix * germ%/100 * pure%/100


NPK - answer✔nitrogen, phosphorus, potassium


Time of Concentration - answer✔The time required for storm runoff to flow from the most

remote point, in flow time, af a drainage area to the point under consideration. It is usually

associated with the design storm.

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