Temporal variability in rangeland erosion processes
1994
Simanton, J.R. | Emmerich, W.E.
Rainfall simulation experiments conducted on large plots at various rangeland sites in Arizona were used to determine temporal variability in rangeland soil erosion. Measured soil erodibility varied monthly, seasonally, and yearly and appeared to depend on vegetation and soil type. Short term (monthly or seasonally) variability was greater than year to year variability unless treatment effects were interacting. The RUSLE K factor, computed within the RUSLE model from an algorithm based on frost-free period and annual R-values, cycles differently than the rainfall simulator measured erodibility; RUSLE estimates of K were the highest when measured erodibilities were the lowest. Time related changes in erosion rates associated with rangeland treatment need to be evaluated during a multiyear period using multiplot studies.
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