Topic
Floods
2 questions tagged Floods — spanning every one of the seven Ws.
why
Why do some rivers overflow their banks during floods?
Rivers flood when rainfall, snowmelt, or upstream runoff delivers more water than the channel can carry.
RiversFloods
why
Why do some arid regions get rare but intense flash floods?
Dry soils often repel water or absorb it slowly, so heavy rain runs off quickly instead of soaking in. Steep terrain and sparse vegetation make floodwater surge through dry channels very fast.
Weather and ClimateFloods