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- Q2 (b) A 240-minute storm is recorded with the mass curve in Table Q2-2. (i) Calculate the incremental depth of rainfall in the interval and intensity. (ii) Draw the hyetograph of the storm at 30-minute interval with graph paper in Appendix 1. (iii) Calculate the maximum intensity-duration.What will be rainfall intensity of 5 yr-rainfall of duration 1 hr. if following details are given : 5.82, x = 0.16; a = 0.4; n = 0.75 [1.40.75 1.287; 50.16 1.29] K = = =Assuming an initial loss of 30 mm and continuing loss of 5 mm/h, what is the excess rainfall for the rainfall measurement given below Depth Time (mm) (hrs) of rainfall 1 2 3 4 5 6 7 5.86 13 13 3068 16.79 10.53 1.3. 59
- Prob.4. There are four rain gauge stations existing in the catchment a river. The average annual rainfall values at these stations are 800, 620. 400 and 600 mm respectively - (i) Determine the optimum number of rain gauges in the catchment, if it is desired to limit the error in the mean value of rainfall in the catchment to 10%. (ii) How many more gauges will then be required to be installed ? of 100 L 600Develop the equation relating rainfall intensity-duration for the following 10-year frequency rainfall data using Talbot's formula. Duration (min) 10 20 40 60 120 180 Intensity (mm/h) 47 55 35 15 25 18 6. [CLO-2] (04)Hello, in this question the average rainfall need to be calculated by the use of Thiessen polygons.
- COMPUTE THE VALUES OF RAINFALL INTENSITY: A. 1-HR INTERVAL B. 2-HR INTERVAL C. CONCLUDE THE COMPUTED VALUES OF 1HR AND 2HR INTERVAL3. In a storm of 90 minutes duration, the incremental rainfall at various time intervals is given below. a. Maximum incremental depth (in mm) b. Maximum intensity (in mm/hr). TIME (minutes) 0 ID 20 30 40 50 60 70 80 90 CUMULATIVE (mm) C 8.5 14.5 21.7 27.9 33.0 35.1 36.2 37.03. From the precipitation data given, estimate cumulative rainfall and rainfall intensity. Time, min 40 70 50 60 0.32 0.37 0.43 0.64 Rainfall, cm Time, min Rainfall, cm 0 0 90 3.18 10 0.18 100 1.65 20 0.21 110 0.81 30 0.26 120 0.52 1 130 0.26 150 160 0.36 0.28 ZETA] 140 0.42 170 0.19 80 1.14 180 0.17 4+37₁ +410] 3+2
- Astormwith 10 cm of precipitation produceda directrunoff of 6.02 cm. The duration of the rainfall was 16 hours and its time distribution is given below. Estimate the D-index of the storm. Time from start (h) Cumulative rainfall (cm) 0 2 4 6 8 10 12 14 16 0.4 1.3 2.8 5.1 5.9 9.25 9.5 10.0 A) 0.261 B) 0.249 C) 0.257 D) 0.283 E) None of the aboveHow to solve the rainfall intensity in the table?There are four rain gauge stations existing in the catchment of a river. The average annual rainfall values at these stations are 800, 620, 400 and 600 mm respectively - (i) Determine the optimum number of rain gauges in the catchment, if it is desired to limit the error in the mean value of rainfall in the catchment to 10%. (ii) How many more gauges will then be required to be installed ?