A watershed has four sub-areas. The annual precipitation and evaporation from each of the sub-area are given in Table. Assume that there is no change in groundwater storage on an annual basis an calculate for the whole catchment the values of annual average (i) precipitation (ii) evaporation. Wha are the annual runoff coefficient (Runoff/Rainfall ratio) for the sub areas and for the total watershe aken as whole ? Sub-area A B C Ꭰ Table 1: Summary of available data Area (m²) 10.7 3.0 8.2 17.0 Annual Precipita- tion (mm) 1030 830 900 1300 Annual Evapora- tion (mm) 530 438 430 600

Structural Analysis
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Q5. A watershed has four sub-areas. The annual precipitation and evaporation from each of the sub-areas
are given in Table. Assume that there is no change in groundwater storage on an annual basis and
calculate for the whole catchment the values of annual average (i) precipitation (ii) evaporation. What
are the annual runoff coefficient (Runoff/Rainfall ratio) for the sub areas and for the total watershed
taken as whole ?
Sub-area
A
B
D
Table 1: Summary of available data
Area (m²)
10.7
3.0
8.2
17.0
Annual Precipita- Annual Evapora-
tion (mm)
tion (mm)
1030
530
438
430
600
830
900
1300
Transcribed Image Text:Q5. A watershed has four sub-areas. The annual precipitation and evaporation from each of the sub-areas are given in Table. Assume that there is no change in groundwater storage on an annual basis and calculate for the whole catchment the values of annual average (i) precipitation (ii) evaporation. What are the annual runoff coefficient (Runoff/Rainfall ratio) for the sub areas and for the total watershed taken as whole ? Sub-area A B D Table 1: Summary of available data Area (m²) 10.7 3.0 8.2 17.0 Annual Precipita- Annual Evapora- tion (mm) tion (mm) 1030 530 438 430 600 830 900 1300
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