1988-04-18_PERMIT FILE - C1981008A (4)

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* * * * * * * * * * * * * * * * * * * * * * * JUNCTION 1, BRANCH 1, STRUCTURE 1 * * * * * * * * * * * * * * * * * * * * * * * *** HYDRAULIC INPUT VALUES FOR SUBWATERSHEDS *** WATER AREA CURVE TC TT ROUTING COEFFICIENTS UNIT SHED ACRES NUMBER HR HR K-HRS X HYDRO ------------------------------------------------------------------------ 1 457.10 83.00 1.080 0.000 0.000 0.00 1.0 *** SEDIMENT INPUT VALUES FOR SUBWATERSHEDS *** WATER SEG SOIL LENGTH SLOPE CP PART SURF SHED NUM K FEET PCT VALUE OPT CONO ---------------------------------------------------------------------------- 1 1 0.28 0.0 1.50 1.000 1.0 0.0 * * * COMPUTED VALUES FOR INDIVIDUAL WATERSHEDS * * * WATERSHED PEAK FLOW RUNOFF SEDIMENT DIAM DELIVERY DELIVERY (CFS) ( INCHES) TONS (MM) RATIO 1 RATIO 2 ---------------------------------------------------------------------- 1 108.72 0.56 3065.49 0.003 0.575 1.000 NOTE: SEDIMENT DOES NOT INCLUDE POSSIBLE DEPOSITION BY DELIVERY RATIO 2 ***** SUMMARY TABLE FOR TOTAL WATERSHED ***** --------------------------------------------- RUNOFF VOLUME = 21.4146 ACRE-FT PEAK DISCHARGE = 108.7188 CFS AREA = 457.1001 ACRES TIME OF PEAK DISCHARGE = 12.60 HRS BETA = 1.0000 RAINFALL EROSITIVITY FACTOR = 17.31 El UNIT PEAK CONCENTRATION = 163558.56 MG/L PEAK SETTLEABLE CONCENTRATION = 42.26 ML/L PEAK SETTLEABLE CONCENTRATION = 52821.05 MG/L TOTAL SEDIMENT YIELD = 3065.4941 TONS •REPRESENTATIVE PARTICLE SIZE = 0.0042 MM TIME OF PEAK CONCENTRATION = 12.60 IIRS PERIOD OF SIGNIFICANT CONCENTRATION = 15.70 HRS VOLUME WEIGHTED AVERAGE SETTLEABLE CONCENTRATION DURING PERIOD OF SIGNIFICANT CONCENTRATION = 25.87 ML/L VOLUME WEIGHTED AVERAGE SETTLEABLE CONCENTRATION DURING PEAK 24 HOUR PERIOD = 25.87 ML/L ARITHMETIC AVERAGE SETTLEABLE CONCENTRATION DURING PERIOD OF SIGNIFICANT CONCENTRATION = 0.00 ML/L ARITHMETIC AVERAGE SETTLEABLE CONCENTRATION DURING PEAK 24 HOUR PERIOD = 9.41 ML/L