Problem: A catchment has four sub-areas. The annual precipitation and evap the sub-areas are given below. Assume that there is no change in the groundwater storage on an ar late for the whole catchment the values of annual average (i) precipi ration. What are the annual runoff coefficients for the sub-areas ar ment taken as a whole? Sub-area Area Annual precipitation Ar Mm² mm A 10.7 1030 B 3.0 830 C 8.2 900 D 17.0 1300

Structural Analysis
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Chapter2: Loads On Structures
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Problem:
A catchment has four sub-areas. The annual precipitation and evaporation from each of
the sub-areas are given below.
Assume that there is no change in the groundwater storage on an annual basis and calcu-
late for the whole catchment the values of annual average (i) precipitation, and (ii) evapo-
ration. What are the annual runoff coefficients for the sub-areas and for the total catch-
ment taken as a whole?
Sub-area
Annual precipitation
Annual evaporation
Area
Mm²
mm
mm
A
10.7
1030
530
B
3.0
830
438
C
8.2
900
430
D
17.0
1300
600
Transcribed Image Text:Problem: A catchment has four sub-areas. The annual precipitation and evaporation from each of the sub-areas are given below. Assume that there is no change in the groundwater storage on an annual basis and calcu- late for the whole catchment the values of annual average (i) precipitation, and (ii) evapo- ration. What are the annual runoff coefficients for the sub-areas and for the total catch- ment taken as a whole? Sub-area Annual precipitation Annual evaporation Area Mm² mm mm A 10.7 1030 530 B 3.0 830 438 C 8.2 900 430 D 17.0 1300 600
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