Recorded flow data from a 7 sq. km. catchment due to a 1 hour rainfall event is given in Table 2. The base flow is 0.14 m³/s. Assume that the uniform rainfall over the catchment area was 39 mm. If the o-index of the catchment area is 21 mm/hr, calculate the ordinates of 1 hour unit hydrograph in Table 2. Table 2: Data for Question 2(b) (Draw the Table on a Page and Solve the Problem) Time Flow (hr) (m³/s) 0.5 1 3.0 7.5 3 6.0 4 4.5 3.0 2.1 7 1.5 8 1.1 9 0.8 10 0.5 11 0.2

Recorded flow data from a 7 sq. km. catchment due to a 1 hour rainfall event is given in Table 2. The base flow is 0.14 m³/s. Assume that the uniform rainfall over the catchment area was 39 mm. If the o-index of the catchment area is 21 mm/hr, calculate the ordinates of 1 hour unit hydrograph in Table 2. Table 2: Data for Question 2(b) (Draw the Table on a Page and Solve the Problem) Time Flow (hr) (m³/s) 0.5 1 3.0 7.5 3 6.0 4 4.5 3.0 2.1 7 1.5 8 1.1 9 0.8 10 0.5 11 0.2

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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Q1. Using the data for the following storm, determine the index for a watershed of an area of 3 km?. Time (hr) Rainfall (mm) Q (m³/s) 0.5 7 1 25 .89 1.5 12 2.37 3 3.86 2.5 5.35 3 5.54 3.5 4.75 4 3.86 4.5 2.97 2.1 5.5 1.2 .34 6.5
2-A 3 hours storm produces a flood hydrograph as: t (hr) Q (m³/s) 0 3 4 9 6 12 9 18 12 15 18 21 24 27 20 16 20 10 8 6 Determine 3 hr-UH, if the catchment area is 50 km². 3- Find the flood hydrograph of 3 hrs storm (use the UH of Q2). Total precipitation is 14.5 cm and 9-index is 1cm/hr. 30 4
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Compute the diameter (cm) of the outfall required to drain storm water from the watershed described in figure below. Use rainfall intensity = 4 cm/hr. Average velocity of flow is 1 m/s. Other data are for: Area 1: C=0.5, area=0.005 km2. Area 2: C=0.4, area =0.01 km2. Area 3: C=0.7, area=0.015 km2.
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