Abstract
An improved flow divider was designed to simplify and lower the cost of collecting runoff data from research plots.The system was designed around commercially available and inexpensive 5-gal (19-L) plastic buckets with screw top lids.A precision cut sheet-metal divider crown is fastened to the lid, allowing it to be easily transferred between buckets. Thedivider crown can be configured to handle various flow rates by specifying the number of flow divisions. Laboratoryevaluation of the design indicated that the system divides runoff with accuracies within .5% over most of the flow range andwithin .15% at very low and very high flows. These results are similar to those found for the more traditional flow dividerdesigns. Adding sediment to the inflow at three different flow rates yielded sediment division accuracies within 7%. Five fieldresearch projects have used the divider system with few problems. The average cost of this system is approximately US $500per plot, in comparison to the US $3000 to $5000 it often costs to instrument a plot using standard equipment.
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