2. (a) Develop a 5-yr, 4-hr design storm (in/hr) for West Southwest Illinois. Using 40 minutes time increment from 40 to 240 minutes. (Hint: Read IL_Rainfall_Depth.pdf for 40, 80, 120, ....200, 240 minutes for rainfall depth. If there is no value for e.g., 40 minutes, simply read the value between 30-mins and 1-hour. Do not spend time by interpolation. Please, use Excel for analysis) (b) From the design storm you have just developed, develop the dimensionless storm distribution. Again, using 40 minutes as the time increment. Show one example calculation for each step. Sectional code (see figure on page 1) 01 - Northwest 02 - Northeast 03 - West 04 - Centru 05 = East) 06 - West Southwest 07 - Easr Southeast 08 - Southwest 09 - Southeast 10-South 437 2.76 2.17 1.52 0.85 Raig (inches) for gives recurrence interval Section Dwarow 2 3. 4-Roth - 9th you 5-year -year 25-year pour 10 year OL 10-day 2.14 2.60 2.97 4.02 5.23 6.30 OL 7.14 S-day 8.39 2.12 9.64 11.09 1.76 2.38 3.45 4.13 5.10 01 1.58 5.91 1.90 7.21 8.36 72.hr 0.97 2.11 2.45 2.82 3.06 3.73 4.67 5.42 6.99 01 1.64 48-hr 1.47 1.74 8.87 1.93 2.24 2.58 2.80 3.42 4.28 01 6.07 24-he 1.40 4.96 1.64 7.02 807 1.80 2.00 2.36 2.57 3.11 3.95 01 IELE 1.30 4,63 5.60 6.50 1.52 1.66 7.36 1.92 2.18 2.37 2.86 3.63 4.26 01 5.15 12-he 1.23 1.43 6.01 1.57 6.92 1.81 2.05 2.24 2.31 3.43 4.03 4.88 01 6-he 1.06 1.24 5.66 6.51 1.37 1.56 1.73 1.93 2.33 2.96 3.48 4.90 01 0.91 4.20 1.06 5.69 1.16 1.33 1.65 1.99 2.53 2.99 3.59 01 0.84 0.97 4.90 1.05 1.23 1.40 183 331 01 2.33 3.86 1-hr 2.74 0.78 4.47 0.98 1.21 1.46 1.86 01 2.18 2.63 3.07 30-min 0.52 0.61 0.63 0.77 3.51 0.87 0.95 1.15 1.46 1.71 01 15 min 0.38 0.45 2.07 2.42 2.73 0.50 0.57 0.64 0.70 0.84 1.07 1.25 1.51 01 1.76 0.36 1.99 10-in 0.31 0:40 0.45 0.32 0.57 0.68 0.81 1.02 1.44 OI 0.17 1.23 0.20 1.62 0.22 0.25 0.29 0.31 0.37 0.47 0.56 0.67 0.78 0.89 02 10-day 2.02 2.43 2.30 3.30 3.79 4.12 4.95 6.04 92 6.89 938 8.18 1.66 5-day 11.14 1.98 2.24 2.00 2.99 3.25 3.93 4.91 02 72-hr 5.70 6.93 8.04 1.53 1.83 2.02 9.96 2.34 2.70 2.93 3.55 4.44 5.18 6.32 7.41 02 48-her 1.44 1.70 8.78 1.90 2.18 2.40 2.70 3.30 4.09 4.81 5.08 6.14 02 24-he 1.38 1.61 1.76 203 2.31 8.16 2.51 3.04 3.80 02 18-he 4.41 5.51 6.46 1.26 1.47 1.61 1.86 2.12 2.30 7.58 2.79 02 3.06 12-br 3.50 1.40 5.95 1.53 1.77 6.97 2.01 3.31 3.89 2.18 4.79 5.62 02 1.03 1.21 6.59 1.32 1.52 1.74 1.88 2.28 2.85 3.35 4.13 485 02 -br 5.65 0.85 1.02 1.13 1.30 1.42 1.60 1.94 2.43 2.36 414 02 3.53 0.81 0.05 1.08 1.20 1.36 4.85 1.45 1.79 2.24 02 2.64 I- 0.65 0.76 0.84 3.25 382 0.96 1.09 4.47 1.4) 1.79 02 2.10 3.04 30-min 0.51 2.59 0.60 0.65 0.75 0.36 3.56 0.93 1.12 1.41 1.65 02 2.04 15-min 0.37 0.44 2.80 0.48 0.55 0.63 0.68 1.03 02 1.21 1.75 10 min 0.30 0.35 0.39 0:45 0.51 2.05 0.35 0.67 0.34 0.08 02 S-min 0.17 0.19 1.67 021 0.24 0.28 0.30 0.36 0.46 0.54 0.66 0.75 0.91 03 10-day 2.27 2.78 3.13 3.68 4.23 4.80 5.00 6.91 7.89 9.24 10.16 03 5-day 1.92 2.30 256 11.90 2.97 3.41 3.71 4.57 5.80 6.65 7.90 03 8.95 72-16 1.72 2.05 10.50 2.26 2.64 3.02 3.30 4.08 5.11 5.87 6.97 7.95 03 48- 1.61 1.88 9.48 2.00 2.42 2.76 3.01 3.68 4.56 S.SO 6.45 03 24-he 7.56 1.53 1.77 END 1.95 2.24 2.56 2.79 3.45 4.29 03 4.93 6.07 7.04 18-24 1.41 1.64 8.20 1.80 2.36 2.57 3.18 3.95 4.53 03 5.59 1.34 6.47 12-hr 1.56 7.55 1.70 1.94 2.22 2.43 2.98 3.73 03 4.29 5.23 6.13 1.34 1.47 7.14 1.67 1.91 2.10 2.58 3.22 2.70 4.55 03 Behr 0.98 L.IS 5 26 6.15 1.26 1.65 1.79 2.21 2.75 03 3.15 2 ur 0.91 1.05 4.51 1.17 1.32 1.50 5.25 1.65 03 2.02 2.53 2.91 3.55 0.72 0.84 0.92 4.15 4.84 1.21 1.31 1.60 2.02 2.32 03 2.86 30- min 0.57 0.73 0.95 3.31 3.35 1.03 1.27 1.59 2.25 03 1.82 2.61 IS-min 0.41 0.48 3.03 0.53 0.61 0.69 0.75 0.9! 1.16 03 1.64 0.39 1.90 10-min 0.34 0.43 0.40 2.21 0.56 061 0.74 0.94 1.08 03 5-min 0.18 0.21 1.33 1.55 0.23 0.26 1.81 0.30 0.33 0.40 0.51 0.59 0.73 0.84 0.98 2.39 0.62 2.07 0.33 2.10 1.53 9.92 41-hr Table 1. Continued Raya (inches) for given recorrence interval Section Durant 2.owh J.wowh yar 2-year Suyar 10. 23-yeur yeur 16 04 10-day 2.58 2.92 3.93 4.29 5.12 6.27 7.10 8.19 9.10 10.18 04 Sday 1.77 2.12 2.39 2.78 3.20 3.48 4.17 5.11 5.84 6.96 7.95 9.21 04 72.hr 1.59 1.91 2.12 2.44 2.50 3.05 3.70 4.55 5.26 6.15 1.25 8.16 04 48.hr 1.48 1.76 1.95 2.25 2.58 2.81 3.38 4.19 4.86 5.78 7.51 04 24-hr 1.39 1.63 1.80 2.04 2.32 3.02 3.76 4.45 5.32 6.05 6.92 04 13-lu 1.27 1.51 1.66 1.38 2.12 2.28 2.75 3:46 4.09 4.90 5.59 637 04 12-hr 1.19 1.40 1.37 2.01 2.17 2.62 3.27 3.87 4.63 5.29 6.02 04 6-hr 1.00 1.21 1.53 1.74 1.89 2.26 2.92 3.33 3.99 4.56 5.19 04 0.89 1.03 1.30 1.61 1.93 2.41 2.RS 3.41 3.89 443 04 0.82 0.95 1.04 1.19 1.37 1.48 1.78 2.22 2.62 3.59 4,08 04 0.65 0.76 0.83 0.95 1.09 1.18 1.42 1.37 2.09 2.50 286 3.25 04 30-min 0.52 0.00 0.66 0.75 0.86 0.93 1.12 1.39 1.64 1.97 2.25 2.56 04 15-min 0.39 0.44 0.49 0.56 0.68 0.81 1.02 1.20 1.44 1.64 1.37 04 10-min 0.30 0.35 0.39 045 0.50 0.55 0.66 0.83 0.98 1.17 1.34 1.52 04 sain 0.17 0.19 0.21 0.28 0.30 0.36 0.45 0.53 0.64 0.73 05 10-day 2.13 2.62 2.96 4.00 4.35 5.15 6.21 6.97 R.04 890 05 S-day 1.75 2.10 2.37 2.15 3.15 3.42 4.96 5.67 6.76 7.65 8.78 05 72-hr 1.61 1.93 2.16 2.48 2.65 3.10 3.71 4.57 5.20 6.17 697 OS 1.51 1.77 1.05 2.26 2.57 282 340 4.16 4.77 5.66 6.40 7.16 05 24-ur 1.36 1.58 1.75 2.00 2.27 2.47 3.01 3.71 4.26 5.04 5.81 6.61 05 1.25 1.47 2.09 2.27 2.77 3.41 3.92 4.63 5.37 6.08 05 12-hr 1.18 1.38 1.98 2.15 3.71 438 5.09 5.75 OS 1.00 1.18 1.32 1.49 1.70 1.85 2.26 2.78 3.20 3.78 4.96 05 0.87 1.02 1.12 1.28 1.46 1.58 1.93 2.37 2.73 3.22 3.74 423 05 2-hr 0.79 0.93 1.00 1.17 1.46 1.78 2.19 2.52 2.97 3.90 OS 0.64 0.74 0.81 0.93 1.09 1.16 141 1.74 2.00 2.39 2.74 30-min 0.50 0.58 0.64 0.14 0.54 0.91 1.11 1.37 1.ST 1.87 2.16 245 15 min 0.37 0.47 0.54 0.62 0.67 0.81 1.00 1.14 1.37 1.60 1.85 05 10-min 0.30 0.35 0.30 0:43 049 0.54 0.66 0.31 0.94 1.12 1.21 1.46 05 5-min 0.17 0.19 0.21 0.24 0.28 0.30 0.36 0.44 0.51 0.61 0.70 0.79 06 10-day 2.16 2.65 2.99 3.52 4.05 440 5.35 6.62 7.45 8.66 9.79 11.26 S-day 1.77 2.13 2.39 2.78 3.19 3.47 4.19 5.32 6.20 7.44 8.53 9.93 06 1.63 1.95 2.16 2.50 2.1 3.13 3.81 4.85 5.66 684 7.76 8.92 06 48.hr 181 2.00 2.30 2.64 2.87 3.49 4.45 5.21 6.28 7.12 8.19 06 24-hr 1.42 1.66 1.84 2.10 2.33 2.59 3.11 3.93 4.65 5:37 6.46 745 1.31 1.53 1.68 1.93 2.19 2.38 2.86 3.61 4.28 5.12 5.95 685 05 12.hr 1.24 1.44 1.57 2.07 2.25 3.39 3.97 484 5.62 6.48 06 6-he 1.01 1.24 1.37 1.57 1.78 1.94 2.33 2.95 3.48 4.85 3.59 OS 3-le 0.91 1.07 1.IE 1.34 1.52 1.66 1.99 2.51 2.98 3.56 4.14 4.77 06 2-1 0.84 0.98 1.08 1.24 1.53 1.84 2.32 2.74 3.28 1.81 439 06 0.67 0.79 0.87 0.99 1.12 1.21 1.46 1.85 2.19 262 3.04 3.50 06 30-min 0.50 0.61 0.78 0.83 0.96 1.15 1.46 2.06 2.39 2.75 06 15-min 0.38 0.45 0.49 0.57 0.64 0.10 0.84 1.06 1.26 1.52 1.75 2.01 06 10-min 0.31 0.36 0.40 0.46 0.52 0.57 0.68 0.87 1.02 1.22 D6 5.min 0.17 0.20 0.22 0.25 0.29 031 0.37 0.47 0.56 0.67 0.78 0.89 1.50 06 72.6 06 2.71 1.72