Question

How much rainfall (in mm) leads to flood?

Answer 1

Depending upon the local terrain or the natural landscape, the amount of rain that leads to flood varies.

Explanation:

• When you hear the word rain, you can notice that it is expressed in millimeters (mm).

• It is because rain is measured with the help of rain gauges placed at different stations in the area. The amount of rain collected in the rain gauge is measured in millimeters.

• It is also expressed as mm per day or mm per hour.

• Depending upon the natural landscape of the area, if there are no storage facilities are provided for the rainwater or no paths are determined for the rainwater to flow, an amount of 2mm per day or 30 mm per hour can cause flood.