The ordinates of a 6-h unit hydrograph are as given below: Time (h) 18 24 30 36 42 48 6 12 54 60 25 50 75 100 87.5 75 62.5 50 37.5 25 99 66 72 78 12.5 0 0 6-h UH ordinates (m3/s) Calculate the resulting hydrograph (flood hydrograph) due to storm of rainfall excess of 2 cm during the first 6 hours and 4 cm during the second 6 hours interval. The base flow can be assumed to be 25 m³/s constant throughout.

The ordinates of a 6-h unit hydrograph are as given below: Time (h) 18 24 30 36 42 48 6 12 54 60 25 50 75 100 87.5 75 62.5 50 37.5 25 99 66 72 78 12.5 0 0 6-h UH ordinates (m3/s) Calculate the resulting hydrograph (flood hydrograph) due to storm of rainfall excess of 2 cm during the first 6 hours and 4 cm during the second 6 hours interval. The base flow can be assumed to be 25 m³/s constant throughout.

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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ual Marks. Q1: Given below are the flows from a storm of 1hr duration on a stream with a drainage area of 1000 km². Assume a constant base flow of 800m³/s. Drive the ordinates of a 2hr UH for the basin and state its peak. 1 2 Time (hr) Flow (m³/s) 3 4 5 6 7 8 9 800 900 1000 2000 1800 1600 1300 1000 800 Q2: A lako wid
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The hydrograph tabulated below was observed for a river draining a 40 square miles catchment, following a storm lasting 3 hours. Нour Нour fr3/s Нour fi3/s 450 5500 9000 7500 6500 24 27 3500 3000 2600 2210 48 1070 950 840 750 3 51 54 57 30 33 36 39 42 12 1890 60 15 18 21 5600 4800 660 590 540 1620 63 1400 1220 66 4100 45 Separate base-flow from runoff and calculate total runoff and calculate total runoff volume. What was the net rainfall in inches per hour?
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