The stream flows due to three successive storms of 3.7, 6 and 2.7 cm of 6-hours duration each on a basin are given below. The area of the basin is 4740 km2. Assuming a constant base flow of 8.5 m3 /s and ϕ-index of 0.25 cm/hour, derive a 6 hour unit hydrograph.

The stream flows due to three successive storms of 3.7, 6 and 2.7 cm of 6-hours duration each on a basin are given below. The area of the basin is 4740 km2. Assuming a constant base flow of 8.5 m3 /s and ϕ-index of 0.25 cm/hour, derive a 6 hour unit hydrograph.

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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Concept explainers

Unit Hydrograph

Hydrology is the science which deals with the study of water on the earth’s surface. The word Hydrograph is derived from the word hydro which means water. Hydrograph is basically a graph in which the discharge is plotted against the time interval at a specific point in a river or other channel. In a hydrograph, the discharge is plotted along the y-axis and time interval is plotted along the x-axis. Hydrograph is used to estimate the runoff. The variations in discharges with the change in time is shown by a hydrograph. It was revealed that the total discharge at an outlet increases with time by a kinematic wave model.

Question

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Time (Hours)
Stream-Flow
Time (Hours)
Stream-Flow
(m³/s)
(m³/s)
8
21
42
3
12
24
31
6.
15
27
21
9.
27
30
14
12
39
33
10
15
46
36
9.
18
49
39
8
(CLO-II) (P: 20)

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