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RUSLE2 computes values for
several variables of use in conservation planning, depending on the planning
objectives.
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Soil loss on the eroding
portions of the hillslope provides soil loss values to compare to soil loss
tolerance to select erosion control practices to protect the hillslope from
degradation by excessive erosion.
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Detachment the average
sediment production rate for the hillslope.
It is the average of the soil loss on the averages where soil loss is
high along with the areas, like in grass strips, where sediment production is
low.
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Conservation planning soil
loss is the detachment for the slope less credit given for deposition,
keeping mind that credit for deposition depends on amount, location, and
spacing of terraces.
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Sediment yield is the amount
of sediment that leaves the hillslope represented in RUSLE2. Because most
hillslopes used in RUSLE2 do not go to the edge of the field, this value is
generally not a sediment yield value to edge of field.
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RUSLE2 can compute soil
loss, deposition, and sediment yield from irregular hillslopes by the
hillslopes being divided into segments. The proper comparison of soil loss to
soil loss tolerance for a hillslope segment requires that the soil loss
tolerance value be adjusted based on position of the segment on the
hillslope. RUSLE2 makes that
adjustment and computes the ratio of soil loss to adjusted T value by segment
so that the proper mathematical comparison can be made.
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