6. Show the 50-year, constant-intensity design storm for a watershed in Baltimore with a time of concentration of 30 minutes. Also show the 10-year, 15-min, constant-intensity design storm for a watershed in Baltimore. Baltimore, Maryland 1903-1951 200 15.0 Note Frequency analysis by method of [extreme value after gumbel 10.0 8.0 6.0 Return period (years) 4.0 10 2.0

6. Show the 50-year, constant-intensity design storm for a watershed in Baltimore with a time of concentration of 30 minutes. Also show the 10-year, 15-min, constant-intensity design storm for a watershed in Baltimore. Baltimore, Maryland 1903-1951 200 15.0 Note Frequency analysis by method of [extreme value after gumbel 10.0 8.0 6.0 Return period (years) 4.0 10 2.0

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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3. According to the 60 min-rain event given in the table below, please calculate the; a) The one minute's average rainfall intensity during the rain events, b) The maximum rainfall intensity during the ra in events. Time (min) 5 10 15 20 25 30 35 40 45 50 55 60 Accumulated Rainfall 0.15 0.28 0.76 1.29 1.63 2.22 | 2.55 3 3.2 3.33 4.2 (cm) 4.
a storm of 3 hours duration has rainfall intensities of 30 mm/h for the first hour, 50 mm/h for the second hour, and 20 mm/h for the final hour. the initial infiltration rate, f0, and the terminal infiltration rate, fc, are 22 mm/h and 5 mm/h respectively. if the excess rain is equal to 70% of the total rain, calculate the value of the decay constant, k, in the hortons's model shown below:
37.In cities , storm sewers are installed to keep water from flooding streets during heavy rains , and , often the storm water is channeled straight into a nearby stream . This work decreases the probability of stream flooding T F
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.
Direct runoff from a flood over a basin of area 50 hectare was observed as 25000 m³ during a storm. The equivalent depth of rain fall over the basin was 97 mm. The time distribution of the rain fall during the storm is given below. Determine the -index for the storm. Time (hr.) 0 1 2 3 4 5 5 6 7 Rainfall (mm) 0.0 6.0 11.0 34.0 28.0 12.0 6.0 0.0
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During a storm event in a certain period, the rainfall intensity is 4.5 cm/hour and the - index is 2.5 cm/hour. The intensity of effective rainfall (in cm/hour up to one decimal place) for this period is