FastFlood tutorial

This is a short tutorial on how to use the www.fastflood.org website.
This model can be used for super-fast approximate simulation of flash and fluvial floods.
For more information, please vitis www.fastflood.org.

[@hulinwei5915]

It is not clear why you choose the values of strom intensity and duration. Are they from the IDF curves? And why you choose 4 hours?

[@ennerhereniodealcantara5856]

The user can upload a shapefile of a basin, for example?