Laserfiche WebLink
C7 <br />Project: North County Sanitary Landfill - Non -Water Release Corrective Action Plan <br />Client: County of San Joaquin <br />Job No.: 2013.A135 <br />Calc'd By: NC <br />Date: 2/20/2014 <br />1000 - YEAR DRAINAGE CALCULATIONS (DOWNDRAINS) <br />[A] <br />[C] <br />[A x C] <br />[Lo] [s] [n] <br />[Lc] [s] [n] [Rh] [V] <br />[Ti] [Tp] [Tc] <br />[i] <br />[Qa] [Qt] <br />Gutter/ Channel / Conduit <br />Travel Time <br />Length <br />Slope <br />Mannings <br />Hydraulic <br />Radius <br />Velocity <br />Overland <br />Gut/ Chan / <br />Cond <br />Total <br />Drainage <br />Runoff <br />Overland <br />Rainfall <br />Intensity <br />Discharge <br />Drainage <br />Area <br />Length <br />Slope <br />Mannings <br />Subarea Total <br />I.D. <br />(acre) <br />Coefficient <br />A x C <br />(feet) <br />(ft/ft) <br />n <br />(feet) <br />(ft/ft) <br />n <br />(feet) <br />(ft/s) <br />(min) <br />(min) <br />(min) <br />(in/hour) <br />(cfs) (cfs) <br />Facilities <br />Downdrain DD4 <br />D1 <br />4.1 <br />0.6 <br />2.46 <br />150 <br />0.03 <br />0.084 <br />450 <br />0.02 <br />0.03 <br />0.370 <br />3.61 <br />6.9 <br />2.1 <br />9.0 <br />4.15 <br />10.2 5.1 <br />Diversion berm w/ditch <br />0.0 <br />9.0 <br />4.15 <br />10.2 <br />18" CMP Downdrain <br />D2 <br />3.3 <br />0.6 <br />1.98 <br />100 <br />0.33 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.370 <br />3.61 <br />2.3 <br />2.3 <br />4.6 <br />5.90 <br />11.7 5.8 <br />Bench w/ditch <br />0.1 <br />9.1 <br />4.13 <br />18.3 <br />24" CMP Downdrain <br />D3 <br />3.8 <br />0.6 <br />2.28 <br />150 <br />0.33 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.380 <br />3.67 <br />3.0 <br />2.3 <br />5.3 <br />5.49 <br />12.5 6.3 <br />Bench w/ditch <br />0.1 <br />9.2 <br />4.11 <br />27.6 <br />24" CMP Downdrain <br />D4 <br />4.7 <br />0.6 <br />2.82 <br />150 <br />0.33 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.410 <br />3.87 <br />3.0 <br />2.2 <br />5.2 <br />5.56 <br />15.7 7.8 <br />Bench w/ditch <br />0.1 <br />9.3 <br />4.08 <br />38.9 <br />30" CMP Downdrain <br />D5 <br />4.2 <br />0.6 <br />2.52 <br />120 <br />0.33 <br />0.084 <br />500 <br />0.005 <br />0.03 <br />0.370 <br />1.81 <br />2.8 <br />4.6 <br />7.4 <br />4.58 <br />11.6 5.8 <br />Perimeter bench w/ditch <br />0.1 <br />9.4 <br />4.06 <br />49.0 <br />30" CMP Downdrain <br />Downdrain DDS <br />E1 <br />2.8 <br />0.6 <br />1.68 <br />150 <br />0.33 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.340 <br />3.41 <br />3.0 <br />2.4 <br />5.5 <br />5.38 <br />9.0 4.5 <br />Bench w/ditch <br />0.0 <br />5.5 <br />5.38 <br />9.0 <br />18" CMP Downdrain <br />E2 <br />6.2 <br />0.6 <br />3.72 <br />150 <br />0.10 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.440 <br />4.05 <br />4.5 <br />2.1 <br />6.6 <br />4.90 <br />18.2 9.1 <br />Bench w/ditch <br />0.1 <br />5.6 <br />5.33 <br />28.8 <br />24" CMP Downdrain <br />E3 <br />5.4 <br />0.6 <br />3.24 <br />150 <br />0.10 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.420 <br />3.93 <br />4.5 <br />2.1 <br />6.6 <br />4.87 <br />15.8 7.9 <br />Bench w/ditch <br />0.1 <br />5.7 <br />5.28 <br />45.7 <br />30" CMP Downdrain <br />Downdrain DD6 <br />F1 <br />3.9 <br />0.6 <br />2.34 <br />150 <br />0.33 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.380 <br />3.67 <br />3.0 <br />2.3 <br />5.3 <br />5.49 <br />12.8 6.4 <br />Bench w/ditch <br />0.0 <br />5.3 <br />5.49 <br />12.8 <br />18" CMP Downdrain <br />F2 <br />7.9 <br />0.6 <br />4.74 <br />150 <br />0.10 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.480 <br />4.29 <br />4.5 <br />1.9 <br />6.4 <br />4.95 <br />23.5 11.7 <br />Bench w/ditch <br />0.1 <br />5.4 <br />5.44 <br />38.5 <br />24" CMP Downdrain <br />F3 <br />7.5 <br />0.6 <br />4.50 <br />150 <br />0.10 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.470 <br />4.23 <br />4.5 <br />2.0 <br />6.5 <br />4.94 <br />22.2 11.1 <br />Bench w/ditch <br />0.1 <br />5.5 <br />5.38 <br />62.4 <br />30" CMP Downdrain <br />Downdrain DD7 <br />G1 <br />5.9 <br />0.6 <br />3.54 <br />150 <br />0.1 <br />0.084 <br />500 <br />0.02 <br />0.03 <br />0.430 <br />3.99 <br />4.5 <br />2.1 <br />6.6 <br />4.88 <br />17.3 8.6 <br />Bench w/ditch <br />0.0 <br />6.6 <br />4.88 <br />17.3 <br />24" CMP Downdrain <br />Notes: <br />1) Overland travel time from the Federal Highway Administration HEC -22 Urban Design Manual. Ti=(0.933/i^0.4)/(nLo/sgrt(s))^0.6 <br />2) The total discharge is calculated from the rational method. Q=CiA <br />is3) Drainage I.D.; drainage area; runoff coefficient; overland, gutter, channel, and conduit length and slope from Preliminary Closure and PostClosure Maintenance Plan prepared by Shaw Environmental, Inc., January 2010. <br />Page 2 of 7 <br />