A 4-hour rain of average intensity I cm/hr. falls over the fern leaf type catchments shown in Fig. below. The time of concentration from the lines AA. BB, CC and DD are 1, 2, 3and 4 hours, respectively, to the site 0 where the discharge measurements áre made. The value of the runoff coefficient C are 0.5, 0.6, and 0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attains a constant value of 0.8 after 3 hours. Determine the discharge at site O and draw the discharge hydrograph at O? Example / A 4-hour rain of average intensity 1 cm/hr. falls over the fern leaf type catchments shown in Fig.below. The time of concentration from the lines AA, BB, CC and DD are 1, 2, 3and 4 hours, respectively, tothe site 0 where the discharge measurements are made. The value of the runoff coefficient C are 0.5, 0.6, and0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attains à constant value of 0.8 after 3 hours.Determine the discharge at site O and draw the discharge hydrograph at O?BasinIsochronesJoundaryCatchmentareaIVIII50 ha30 hai 40 haDischarge20 hasite

Average rainfall intensity is i=1 cm/hrtotal area of leaf type catchments A=20+30+40+50=140…

Answered: Example / A 4-hour rain of average…

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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A 4-hour rain of average intensity I cm/hr. falls over the fern leaf type catchments shown in Fig. below. The time of concentration from the lines AA. BB, CC and DD are 1, 2, 3and 4 hours, respectively, to the site 0 where the discharge measurements áre made. The value of the runoff coefficient C are 0.5, 0.6, and 0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attains a constant value of 0.8 after 3 hours. Determine the discharge at site O and draw the discharge hydrograph at O?

Example / A 4-hour rain of average intensity 1 cm/hr. falls over the fern leaf type catchments shown in Fig.
below. The time of concentration from the lines AA, BB, CC and DD are 1, 2, 3and 4 hours, respectively, to
the site 0 where the discharge measurements are made. The value of the runoff coefficient C are 0.5, 0.6, and
0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attains à constant value of 0.8 after 3 hours.
Determine the discharge at site O and draw the discharge hydrograph at O?
Basin
Isochrones
Joundary
Catchment
area
IV
III
50 ha
30 ha
i 40 ha
Discharge
20 ha
site

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