What causes a river to flood?

Yes it caused floods earlier this year.

Well, mostly rivers where there is a lot of rain. All rivers could flood with enough rain.

probably because of the season and a lot of rain. but the belief is that Khnum controls the flooding

Yes it does, because all the rain within a certain distance of the river is under the force of gravity so it slowly starts moving to the river, so not only is the river gaining water from rain that...

Heavy rains .