[ELI5]Why does the flood waters not just get absorbed through the sands?

Question

Was looking at the news reports about the floods in UAE and wondering why a desert so vast with little to no vegetation just absorb all the rainfall?

In: Planetary Science

Answer 1

When you put dirt into water it turns into mud because the Dirt and Mud became one. When you put sand into water it remains sand, the sand is at the bottom of the water and the water is on top of the sand. Sand Sinks. Dirt and water combine and make Mud.