Question

If total surface flow 144 million acre-foot is spread over 881,913 km², Estimate the depth of water?

Answer 1

20.1 cm

Step-by-step explanation:

The depth is the ratio of volume to area.

`\frac{1.44*10^8\text{ ac$\cdot$ft}}{8.81913*10^5\text{ km}^2}=\frac{(1.44*10^8)(4.356*10^4\text{ ft}^3)(0.3048\text{ m/ft})^3}{(8.81913*10^5\text{ km}^2)(10^3\text{ m/km})^2}\\\\=(1.44*4.356*0.3048^3*10^(12))/(8.81913*10^(11))\text{ m}\approx0.2014\text{ m}`

The depth of water is about 20.1 cm.

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Additional comment

An acre-foot is 43,560 cubic feet.

A foot is 0.3048 meters.

A kilometer is 1000 meters.

A centimeter is 0.01 meters.