how sand bags help prevent flooding, yet sand is also used for drainage since it’s porous and water easily flows through it?

Question

how sand bags help prevent flooding, yet sand is also used for drainage since it’s porous and water easily flows through it?

In: Engineering

Answer 1

Sand bags work by creating a physical barrier that redirects the flow of water, whereas sand used for drainage allows water to filter through and be absorbed by the soil underneath. It’s all about the placement and purpose of the sand!