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IDF TABLE FOR ZONE TWO IN THE STATE OF COLORADO <br />Zone 2: San Juan, Upper Rio Grande, Upper Colorado, and Gunnison River Basins, and <br />Green River Basin below Confluence with the Yampa River <br />Project: Nuvemco Last Chance SWMP <br />Enter the elevation at the center of the watershed: Elev = 6,300 (input) <br />1. Rainfall Depth- Duration- Frequency Table <br />Pnfnr rho a_hour and 94_hour rainfall de the from the NOAA Atlas 2 Volume III in riahtmost blue columns <br />Return <br />Rainfall Depth in Inches at Time Duration <br />Period <br />5 -min <br />10 -min <br />15 -min <br />30 -min <br />1 -hr <br />2 -hr <br />3 -hr <br />6 -hr <br />24 -hr <br />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />output <br />output <br />output <br />output <br />output <br />output <br />output <br />input <br />in ut <br />2- r <br />0.18 <br />0.28 <br />0.36 <br />0.49 <br />0.62 <br />0.72 <br />0.78 <br />0.90 <br />1.20 <br />5- r <br />0.24 <br />0.38 <br />0.48 <br />0.67 <br />0.84 <br />0.97 <br />1.05 <br />1.20 <br />1.60 <br />10 r <br />0.29 <br />0.44 <br />0.56 <br />0.78 <br />0.99 <br />1.11 <br />1.19 <br />1.35 <br />1,95 <br />25- r <br />0.34 <br />0.53 <br />0.67 <br />0.92 <br />1.17 <br />1.32 <br />1.41 <br />1.60 <br />2.40 <br />50- r <br />0 <br />0.39 <br />0.60 <br />0.76 <br />1.06 <br />1.34 <br />1.50 <br />1.60 <br />1.80 <br />2.75 <br />100 r <br />0.44 <br />0.68 <br />0.86 <br />1.19 <br />1.50 <br />1.67 <br />1.78 <br />2.00 <br />3.00 <br />Note: Refer to NOAA Atlas 2 Volume m Isopiuvlai maps Tor u -nr aria c4 -nr raunan uepun,. <br />n O.. -4:-11 1-4- oi{.._Il,. olinn_Grnnnnnry Tnhlo <br />Return <br />Rainfall Inte sity in Inches Per Hour at Time Duration <br />Period <br />5 -min <br />10 -min <br />15 -min <br />30 -min <br />3 -hr <br />6 -hr <br />24 -hr <br />1 <br />2 <br />3 <br />4 <br />5 <br />8 <br />9 <br />10 <br />out ut <br />out ut <br />out ut <br />out ut <br />out <br />out ut <br />out ut <br />out ut <br />2- r <br />2.17 <br />1.69 <br />1.42 <br />0.99 <br />t(6)(7) <br />0.26 <br />0.15 <br />0.05 <br />5- r <br />2.94 <br />2.28 <br />1.92 <br />1.33 <br />0.35 <br />0.20 <br />0.07 <br />10- r <br />3.44 <br />2.67 <br />2.25 <br />1.56 <br />6 <br />0.40 <br />0.23 <br />0.08 <br />25 r <br />4.07 <br />3.16 <br />2.67 <br />1.85 <br />6 <br />0.47 <br />0.27 <br />0.10 <br />50- r <br />4.66 <br />3.62 <br />3.05 <br />2.12 <br />5 <br />0.53 <br />0.30 <br />0.11 <br />1 00 r <br />5.22 <br />4.05 <br />3.42 <br />2.37 <br />1 1.50 <br />1 0.84 <br />0.59 <br />0.33 <br />0.13 <br />Copy of UD- RainZone v1.01a, Z -2 <br />3/3/2010, 9:42 AM <br />