What volume of runoff in cubic meters is represented by a de

What volume of runoff in cubic meters is represented by a depth of 21 mm on a basin of 550 km2? How many hectares can be irrigated with this volume if 70 cm of water is required for irrigation?

Solution

volume = (21/1000)*550 * 1000*1000

=11550000 m³

11550000/(70/100)= 16500000 m2 area can be irrigated

cobvert to acres

1m2= 0.000247105 acres

16500000m2 = 4077.23 acres can be irrigated