600 500 500 503 403 300 DESIGN RAINFALL INTENSITY CHART Location 27.5508 151.960E NEAR.. Toowoomba Issued: 22/3/2019 303 203 150 200 150 101 10 60 50 40 10 100 ED ED 50 40 10 20 20 RAINFALL INTENSITY IN MLLIMETRES PER HOUR 10 10 AVERME RECURRENCE INTERVAL 100 Years per Carvel 50 years 20 Year 10 Y 5 Years 2 years 1 Year lower curve 1 @ 6 4 a 3.6.43.138, 1094 11.14 3.34 133,2-438 790-18.20 CASTS , Eurces HTMMUTEgy 56mm 20 30 the ZH th 12h 48h DURATION IN HOURS OR MINUTES 2 72 Intensity AEP-Aarul Eden Probability YExceeduce per var 3000 2000 1500 Legend 156 1000 750 2% - 555 520 400 300 10% 20% 63 24 SO 30 3 1 25 02 45 305 3 12 1 2 3 4 5 6 minutes hours days Duration (iv) Name the standard major/minor development categories that have a 2 year ARI or 50% AEP. (v) What is the time of travel by Friend's equation for a 100m flow, where the surface slope is 0.2% and Horton's n value is 0.015? (vi) For a sag pit and if Qi = 1.66 P 21.5, calculate the inlet flow rate for a 600x400mm (length x width) pit that will pond to 120mm depth. (i) From Module 9 Figure 9.3(b), interpolate the 10145 rainfall intensity in mm/hr for the local area nominated on the figure? (ii) From Module 9 Figure 9.3(b), for a 10 minute duration and 100mm/hr rainfall intensity, state the range of standard AEP values where that event would be situated between. (iii) Name the frequency descriptor that describes a 1 in 20 year rainfall event. 600 500 500 503 403 300 DESIGN RAINFALL INTENSITY CHART Location 27.5508 151.960E NEAR.. Toowoomba Issued: 22/3/2019 303 203 150 200 150 101 10 60 50 40 10 100 ED ED 50 40 10 20 20 RAINFALL INTENSITY IN MLLIMETRES PER HOUR 10 10 AVERME RECURRENCE INTERVAL 100 Years per Carvel 50 years 20 Year 10 Y 5 Years 2 years 1 Year lower curve 1 @ 6 4 a 3.6.43.138, 1094 11.14 3.34 133,2-438 790-18.20 CASTS , Eurces HTMMUTEgy 56mm 20 30 the ZH th 12h 48h DURATION IN HOURS OR MINUTES 2 72 Intensity AEP-Aarul Eden Probability YExceeduce per var 3000 2000 1500 Legend 156 1000 750 2% - 555 520 400 300 10% 20% 63 24 SO 30 3 1 25 02 45 305 3 12 1 2 3 4 5 6 minutes hours days Duration (iv) Name the standard major/minor development categories that have a 2 year ARI or 50% AEP. (v) What is the time of travel by Friend's equation for a 100m flow, where the surface slope is 0.2% and Horton's n value is 0.015? (vi) For a sag pit and if Qi = 1.66 P 21.5, calculate the inlet flow rate for a 600x400mm (length x width) pit that will pond to 120mm depth. (i) From Module 9 Figure 9.3(b), interpolate the 10145 rainfall intensity in mm/hr for the local area nominated on the figure? (ii) From Module 9 Figure 9.3(b), for a 10 minute duration and 100mm/hr rainfall intensity, state the range of standard AEP values where that event would be situated between. (iii) Name the frequency descriptor that describes a 1 in 20 year rainfall event