Explain how physical and human factors affect flood risk, including precipitation, geology, relief and land use.

Flood risk in river landscapes is influenced by both physical and human factors. Precipitation levels determine the amount of water entering the river system; heavy rainfall can lead to increased discharge and potential flooding. Geology affects how quickly water can infiltrate the ground; impermeable rocks can exacerbate flooding. The relief of the land, such as steep slopes, can accelerate runoff into rivers. Additionally, human land use, such as urbanization and deforestation, can increase flood risk by reducing natural drainage and increasing surface runoff. Understanding these factors is crucial for effective flood management.