Question: 1. The rainfall intensities with respect to rainfall are given below: Timeh) Storm Intensity(cm/h) 15-44-88-1212-16 2 6 10 If the total runoff is 50 cm,

1. The rainfall intensities with respect to rainfall are given below: Timeh) Storm Intensity(cm/h) 15-44-88-1212-16 2 6 10 If the total runoff is 50 cm, find the phi-index in cm/h. 2. The rainfall in three successive 8 hour periods is 1.6, 5.4, 4.1 cm. If the initial losses is 0.6 cm and the surface runoff resulting from the storm is 4.7 cm, calculate the index. Table P-21 lists rainfall data recorded at a USGS gage for the storm of September 1, 1999. The basin area is 200 acres. Using these data, develop a rainfall byetograph (in/ht 13.) in 15-min. intervals and determine the time period with the highest intensity rainfall Accumulated Rainfall (in. Discharge lofs) 0 0.4 Toble P1-21 Time thr) 16:05 16:20 16:35 16:50 17:05 17:20 17:35 17:50 18:05 18:20 18:35 18:50 2.3 2.5 2.6 0 5 600 1110 1300 1380 1350 1280 1110 790 460 240 Time thr) Accumulated Rainfall (in.) 19:05 19:20 19:35 19:50 20:05 20:20 20:35 20:50 Discharge Icts) 110 59 35 20 12 7 4 2 1. The rainfall intensities with respect to rainfall are given below: Timeh) Storm Intensity(cm/h) 15-44-88-1212-16 2 6 10 If the total runoff is 50 cm, find the phi-index in cm/h. 2. The rainfall in three successive 8 hour periods is 1.6, 5.4, 4.1 cm. If the initial losses is 0.6 cm and the surface runoff resulting from the storm is 4.7 cm, calculate the index. Table P-21 lists rainfall data recorded at a USGS gage for the storm of September 1, 1999. The basin area is 200 acres. Using these data, develop a rainfall byetograph (in/ht 13.) in 15-min. intervals and determine the time period with the highest intensity rainfall Accumulated Rainfall (in. Discharge lofs) 0 0.4 Toble P1-21 Time thr) 16:05 16:20 16:35 16:50 17:05 17:20 17:35 17:50 18:05 18:20 18:35 18:50 2.3 2.5 2.6 0 5 600 1110 1300 1380 1350 1280 1110 790 460 240 Time thr) Accumulated Rainfall (in.) 19:05 19:20 19:35 19:50 20:05 20:20 20:35 20:50 Discharge Icts) 110 59 35 20 12 7 4 2

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