Explain how flooding affects rivers and how flooding can be influenced by human activity

Flooding can cause rivers to expand. when it does, it can get out of control and go to any urbanization near by. once it does it picks up any small items in the city. this can cause the river to get dirty, or polluted.

When people make dam's, a earth quake could happen, causing the dam to collapse and create a flood. If humans didn't build the dam, the flood would never happen.