SSC JE Civil Engineering 25-Sep-2019 Shift 1 Solved Paper

Question : 168 of 200

Marks: +1, -0

In an irrigated area 12 m

^{3}

/s of water is diverted to a 0.32 km

^{2}

field area for four hours. The soil moisture measurement in the field done after irrigation showed that 0.4 m of water has been stored in the zone. The water application efficiency (correct to nearest decimal) in this case is:

74%
58.5%
85%
66.6%

Validate

Solution:

Depth of water supplied =

[{4 ×3600 ×12}/{0.32 ×1000 ×1000}]

[{48× 3600}/{0.32×1000000}]=[172800/320000]=0.54m.

Depth of water of Root zone = 0.4m [given]
So, efficiency =

[0.4/0.54×100]=74%

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