How a rivers discharge increase due to physical factor?

One physical factor that can increase a river's discharge is heavy rainfall, which leads to more water flowing into the river. This can cause the river to overflow its banks and increase its discharge. Another factor is snowmelt, where melting snow adds more water to the river, increasing its flow. Lastly, changes in the topography or geology of the river basin can alter the river's discharge by affecting how quickly water is able to flow into the river.