APPENDIX B: RESULTS OF SILT FENCE TESTING FOR
EAGLE RIVER FLATS, ALASKA, JULY AND AUGUST 1994
0.05 m3 (50 L), the initial volume of water and soil.
Note that for the Part II tests containing geo-
textiles, the flow rates were determined by calcu-
The parameters and equation used to determine
lating the volume of water and soil left behind the
the volume of soil and water left at the end of 25
fence at 25 minutes, then subtracting that from
minutes are defined in the figure below:
b
a
1%
Figure B-1. Sketch of flume, defining the variables used
to estimate the volume of water in the flume remaining
after 25 minutes. Variables a and b were both measured.
Volume ≈ (a
w) (1/2
(ab) w)
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