Question

$15m^3/s$ of water is diverted to a $35$ hectares field for $5\text{hours}$. Soil proving after irrigation showed that $0.4m$ of water has been stored in the root zone. Water application efficiency in this case is ______ %

• A. 51.85

Answer 1

The correct option is A 51.85
Water depth applied to fields = $\frac{15\times 5\times 60\times 60}{35\times {10}^4}=0.7714m$

Water depth actually stored in root zone = 0.4 m

$\therefore \text{Water application efficiency,}{\eta }_e=\frac{0.4}{0.7714}\times 100=51.85\%$