Answer: I hope this helps you
Step-by-step explanation:
Upstream floods occur when there is heavy rain or melting snow in an area where a river or stream originates. The increased volume of water in the upper reaches of the river can cause the water level to rise rapidly, leading to flooding downstream.
Downstream floods occur when water accumulates to a point where the volume exceeds the channel’s capacity, causing water to overflow into the surrounding areas. Downstream floods can occur due to a variety of reasons, such as heavy rainfall at the lower end of a river or a river’s discharge from a dam.
Overall, upstream floods tend to be more sudden and intense, while downstream floods tend to be more prolonged and gradual.