The average water spread areas that are likely to be maintained in a reservoir and the observed monthly pan evaporations at the reservoir site are given below: Average Water Spread Area Average Water Spread Area [hectares] [hectares] 872.0 735.0 797.0 765.0 754.5 807.5 739.5 850.0 726.0 891.0 717.5 917.0 a) Estimate the annual evaporation loss from the reservoir in million m³. (Assume a pan coefficient of 0.70). Month January February March April May June Pan evaporation [cm] 10.2 15.3 17.8 25.4 30.5 28.0 Month July August September October November December Pan evaporation [cm] 18.7 16.5 15.3 14.0 12.7 10.2 b) If 50% of this loss can be prevented and the saved water is used to irrigate a crop that needs 57 cm of water per a year, how much area in hectares can be irrigated?
The average water spread areas that are likely to be maintained in a reservoir and the observed monthly pan evaporations at the reservoir site are given below: Average Water Spread Area Average Water Spread Area [hectares] [hectares] 872.0 735.0 797.0 765.0 754.5 807.5 739.5 850.0 726.0 891.0 717.5 917.0 a) Estimate the annual evaporation loss from the reservoir in million m³. (Assume a pan coefficient of 0.70). Month January February March April May June Pan evaporation [cm] 10.2 15.3 17.8 25.4 30.5 28.0 Month July August September October November December Pan evaporation [cm] 18.7 16.5 15.3 14.0 12.7 10.2 b) If 50% of this loss can be prevented and the saved water is used to irrigate a crop that needs 57 cm of water per a year, how much area in hectares can be irrigated?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Engineering hydrology
![The average water spread areas that are likely to be maintained in a reservoir and the observed
monthly pan evaporations at the reservoir site are given below:
Average
Water Spread
Area
Average
Water Spread
Area
[hectares]
[hectares]
872.0
10.2
735.0
797.0
15.3
765.0
754.5
17.8
807.5
739.5
25.4
850.0
726.0
30.5
891.0
717.5
28.0
917.0
a) Estimate the annual evaporation loss from the reservoir in million m³. (Assume a pan
coefficient of 0.70).
Month
January
February
March
April
May
June
Pan
evaporation
[cm]
Month
July
August
September
October
November
December
Pan
evaporation
[cm]
18.7
16.5
15.3
14.0
12.7
10.2
b) If 50% of this loss can be prevented and the saved water is used to irrigate a crop that needs
57 cm of water per a year, how much area in hectares can be irrigated?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F20ff780f-fb38-4ab5-b562-9afc1a397dea%2F927ed1fe-41bb-4652-88d1-49be79e1d184%2Fkcv78jr.jpeg&w=3840&q=75)
Transcribed Image Text:The average water spread areas that are likely to be maintained in a reservoir and the observed
monthly pan evaporations at the reservoir site are given below:
Average
Water Spread
Area
Average
Water Spread
Area
[hectares]
[hectares]
872.0
10.2
735.0
797.0
15.3
765.0
754.5
17.8
807.5
739.5
25.4
850.0
726.0
30.5
891.0
717.5
28.0
917.0
a) Estimate the annual evaporation loss from the reservoir in million m³. (Assume a pan
coefficient of 0.70).
Month
January
February
March
April
May
June
Pan
evaporation
[cm]
Month
July
August
September
October
November
December
Pan
evaporation
[cm]
18.7
16.5
15.3
14.0
12.7
10.2
b) If 50% of this loss can be prevented and the saved water is used to irrigate a crop that needs
57 cm of water per a year, how much area in hectares can be irrigated?
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