A catchment has four sub-areas. The annual precipitation and evaporation from each of the sub-areas area given below. Assume that there is no change in the ground water storage on an annual basis and calculate for the whole catchment the values of annual average i. Precipitation Evaporation ii. What is the annual runoff/rainfall coefficients for the sub-areas and for the total catchment taken as a whole? Area (Mm?) Annual ppt (mm) Sub-Area Annual Evaporation (mm) 530 A 10.7 1000 + R 3.0 900 - R 438 82 1000. R 430

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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R=101

A catchment has four sub-areas. The annual precipitation and evaporation from each of
the sub-areas area given below. Assume that there is no change in the ground water
storage on an annual basis and calculate for the whole catchment the values of annual
Q.1
average
i.
Precipitation
Evaporation
ii.
What is the annual runoff/rainfall coefficients for the sub-areas and for the total
catchment taken as a whole?
Sub-Area
Area (Mm?)
Annual ppt (mm)
Annual
Evaporation (mm)
A
10.7
1000 + R
530
В
3.0
900 - R
438
C
8.2
1000 - R
430
17.0
1200 + R
600
Transcribed Image Text:A catchment has four sub-areas. The annual precipitation and evaporation from each of the sub-areas area given below. Assume that there is no change in the ground water storage on an annual basis and calculate for the whole catchment the values of annual Q.1 average i. Precipitation Evaporation ii. What is the annual runoff/rainfall coefficients for the sub-areas and for the total catchment taken as a whole? Sub-Area Area (Mm?) Annual ppt (mm) Annual Evaporation (mm) A 10.7 1000 + R 530 В 3.0 900 - R 438 C 8.2 1000 - R 430 17.0 1200 + R 600
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