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MATCH INFLOVI -STO- -DIS- <-PEAK-> OUTFLOW STORAGE <br /><----DESCRIPTION----> (cfs) (cfs) --id- --id- <-STAGE> (cfs) VOL (cf) <br />_____________________________________________________________-------------------- <br />2-year BRP1 0.02 0.10 BRP1 Weir1 549.65 0.02 523.5' ci <br />2-year BRP2 0.02 0.02 BRP2 Weir2 548.25 0.02 474.22 c� <br />2-year BRP3 0.02 0.02 6RP3 Yleir3 547.50 0.02 180.83 ci <br />10-year BRP1 0.05 0.17 L3RP1 <br />70-year BRP2 0.05 0.06 BRP2 <br />10-year BRP3 0.05 0.04 BRP3 <br />100-year BRP1 0.15 0.27 BRP1 <br />700-year BRP2 0.15 0.24 BRP2 <br />100-year' BRP3 0.15 0.14 �RP3 <br />1"leirt 550.01 <br />Weir2 540.50 <br />Yleir3 547.55 <br />Weir7 550.06 <br />Weir2 548.53 <br />Weir3 547.56 <br />0.06 929.29 cf <br />0.04 695.53 cf <br />0.04 208.38 cf <br />0.24 1003.54 ci- <br />0.14 724.72 cf <br />0.14 218.37 cf <br />Note that the "Outflow° includes runoff that infiltrates into the ground, so the discharge <br />hydrograph of the upstream berm is actually less than the value shown. In the 2-year <br />storm event, flows never enter BRP#3 resuitirg in no direct discharge to Kasch Park <br />Bog. During the 10-year event, only insignificant volumes reach BRP#3, and none is <br />discharged. During the 100-year event, discharge from the third weir is less than the <br />predeveloped condition. <br />Perhaps a better way to consider the "outflow" rate is to view the outFlow discharge as <br />the rate of flow passing each berm, recognizing that the majority of the flow is <br />subsurface and a small portion is surface flow. In addition. the native soils will retain a <br />significant portion of the subsurface flow, whicfi will then be available for uptake by <br />plants in the wetland buffer. <br />NEARTHSTONE LANE 16 DRAfNAGE REPORT <br />APRIL 2006 <br />