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Accuracy <br />• Experience indicates that the accuracy of consistently estimating the <br />SSF for a given area on a general erosion inventory is +5. Some <br />individuals are not able to reach this consistency and may be +10 in <br />their estimates without additional training. However, experience <br />usually helps the field technician to estimate within 5. <br />Uses of Data <br />Some of the uses of these procedures are: <br />1. Erosion conditions and trends can be determined. <br />2. The gully rating provides input to channel characteristics. <br />3. Stabilization goals can be set for erosion control programs. <br />4. Present erosion activity by soil type, management system, land <br />treatment practice, and other comparable conditions. <br />5. Through a system of "comparison areas" it is possible to <br />estimate erosion reduction potentials with alternative land <br />management treatments. <br />6. Estimates of sediment yield or soil loss could be determined <br />on areas where no hydrologic monitoring stations are avail- <br />. able. <br />7. Treatment effectiveness on changes in SSF's can be made for <br />use in justification statements. <br />8. Input can be made into livestock grazing suitability criteria. <br />PrnhlPms <br />Some of the problems experienced with the procedure are: <br />1. The erosional features caused by the most recent erosion event <br />are most obvious. Judgment must then be made concerning them <br />against an "average" condition. <br />2. Accuracy is not consistently closer than +5 SSF value. <br />3. Variations among individual field technicians following the <br />procedure is commonly +5 SSF value. <br />4. Variations in the measured SSF value within a geographic area <br />may be +5 SSF value among small areas having the same actual <br />erosional activity. <br />u <br />24 <br />