A catchment has three 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 annual basis and calculate for the whole catchment the values of annual average. Sub-area EA Run-off = P - E ABU с Area (mm²) 10.7 3.0 8.2 Annual Annual Precipitation Evaporation (mm) (Rainfall) (mm) 1030 830 900 530 438 130 PA Runoff coefficient= runoff/rainfall a. Precipitation (in millimeters) b. Evaporation (in millimeters) c. Annual run-off coefficient for sub-area A. d. Annual run-off coefficient for sub-area B. € e. Annual run-off coefficient for sub-area C. f. What is the average run-off coefficient of the whole catchment area?
A catchment has three 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 annual basis and calculate for the whole catchment the values of annual average. Sub-area EA Run-off = P - E ABU с Area (mm²) 10.7 3.0 8.2 Annual Annual Precipitation Evaporation (mm) (Rainfall) (mm) 1030 830 900 530 438 130 PA Runoff coefficient= runoff/rainfall a. Precipitation (in millimeters) b. Evaporation (in millimeters) c. Annual run-off coefficient for sub-area A. d. Annual run-off coefficient for sub-area B. € e. Annual run-off coefficient for sub-area C. f. What is the average run-off coefficient of the whole catchment area?
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Transcribed Image Text:A catchment has three 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 annual basis and calculate for the whole catchment the values of annual average.
Sub-area
PA EA Run-off = P. E
A
ABU
B
Area
(mm²)
10.7
3.0
8.2
Annual
Annual
Precipitation Evaporation
(Rainfall)
(mm)
(mm)
1030
830
900
530
438
430
Runoff
coefficient =
runoff/rainfall
a. Precipitation (in millimeters)
b. Evaporation (in millimeters)
c. Annual run-off coefficient for sub-area A.-
Annual run-off coefficient for sub-area B.
d.
e. Annual run-off coefficient for sub-area C.
f. What is the average run-off coefficient of the whole catchment area?
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