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HomeMy WebLinkAboutWPO201700033 Calculations WPO VSMP 2017-03-26 Virginia Runoff Reduction Method Worksheet 111. - Au7b Let ki,v6'e`f Virginia Runoff Reduction Method New Development Worksheet..-v2.8_2011Specs 3' U., i'*- Site Data Summary Total Rainfall= 43 inches Site Land Cover Summary A Soils B Soils C Soils D Soils Total %of Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf(acres) 0.00 0.08 0.00 0.00 0.08 15.69 impervious(acres) 0.00 0.43 0.00 0.00 0.43 84.31 0.51 100.00 Site Rv 0.83 Post Development Treatment Volume(ft3) 1541 Post Development TP Load(Ib/yr) 0.97 Post Development TN Load(Ib/yr) 6.93 Total TP Load Reduction Required(Ib/yr) 0.76 Total Runoff Volume Reduction(ft') 12 Total TP Load Reduction Achieved(Ib/yr) 0 Total TN Load Reduction Achieved(Ib/yr) 0.26 , Adjusted Post Development TP Load(Ib/yr) 0.95 Remaining Phosphorous Load Reduction(Lb/yr)Required 0.74 geff•A,PV/ Drainage Area Summary D.A.A D.A.B D.A.C D.A.D D.A.E Total 0.00 Forest(acres) 0.00` 0.00 0.00 0.00 0.00 'Turf tarred 0.08 0.00 0.00 0.00 0.00 0.08 Impervious(acres) 0.43 0.00 0.00 0.00 0.00 0.43 0.51 Drainage Area Compliance Summary D.A.A D.A.B D.A.C D.A.D D.A.E Total TP Load Red.(Ib/yr) 0.02 0.00 0.00 0.00 0.00 0.02 TN Load Red.(Ib/yr) 0.26 0.00 0.00 0.00 0.00 0.26 * , PPULAA r 1/OUl� GIa Iv Pu€G/AC f. 6E6015 tot. sPI oG-' 5 L.04 0 Du C IDA.,) . )(-- 51' v5 416 7' 7- L6 1716- 1-).61-01e> a A- Fi oz. R.R-A'S --7%-kAr We-Q.& 51-/U4.4-) d "J 14€ API'Ra ?L I- , ti/i 01,-1) )Jp 6"' /x)62!" - -r Summary Print / ` - Virginia Runoff Reduction Method Worksheet 7� w aTO LA ti A11/ 2-1 Drainage Area A Summary ' Zb ' Land Cover Summary A Soils B Soils C Soils D Soils Total %of Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf(acres) 0.00 0.08 0.00 0.00 0.08 15.69 Impervious(acres) 0.00 0.43 0.00 0.00 0.43 84.31 0.51 BMP Selections Practice Credit Area(acres) Downstream Practice 4.a.Grass Channel A/B Soils(Spec 83) Impervious: 0 Turf(Pervious): 0.08 14. Filterra Impervious: 0.43 4.a.Grass Channel A/B Soils Turf(Pervious): 0 4.a.Grass Channel A/B Soils Total Impervious Cover Treated(acres) 0.00 Total Turf Area Treated(acres) 0.08 Total TP Load Reduction Achieved in D.A.A(Ib/yr) 0.02 Total TN Load Reduction Achieved in D.A.A(Ib/yr) 0.26 • • . /��L. 17.l1.1 7 Summary Print Virginia Runoff Reduction Method Worksheet '114— — AL+T LA 1.“AOR-il Channel and Flood Protection 3 24 , /7-- Weighted CN 1-year 2-year storm 10-year T storm Adjusted CN storm Adjusted Adjusted CN CN Target Rainfall Event(in) 3.50 3.70 5.60 D.A.A CN 92 92 92 92 D.A.B CN 0 #N/A #N/A #N/A D.A.C CN 0 #N/A #N/A #N/A D.A.D CN 0 #N/A #N/A #N/A D.A.E CN 0 #N/A UN/A #N/A Alp n,>wSummary Print 7 _r 7