Example 3 * In a 350 ha catchment the CN value was assessed as 70 for AMC-III. (a) Estimate the value of direct runoff volume for the following 4 days of rainfall. The AMC on July 1st was category III. Use standard SCS-CN equation Date July 1 July 2 July 3 July 4 Rainfall (mm) 50 20 30 18 (b) What would be the runoff volume if the CN value were 80? 41

Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter16: Highway Drainage
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Example 3
* In a 350 ha catchment the
assessed as 70 for AMC-III.
(a) Estimate the value of direct runoff volume for
the following 4 days of rainfall. The AMC on
July 1st was category II. Use standard SCS-CN
equation
CN value was
Date
July 1
July 2
July 3
July 4
Rainfall (mm)
50
20
30
18
(b) What would be the runoff volume if the CN
value were 80?
41
Transcribed Image Text:Example 3 * In a 350 ha catchment the assessed as 70 for AMC-III. (a) Estimate the value of direct runoff volume for the following 4 days of rainfall. The AMC on July 1st was category II. Use standard SCS-CN equation CN value was Date July 1 July 2 July 3 July 4 Rainfall (mm) 50 20 30 18 (b) What would be the runoff volume if the CN value were 80? 41
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