How does watershed development affect flooding?

Watershed development significantly influences hydrological processes, particularly how water moves across the landscape. When an area undergoes development—such as the construction of buildings, roads, and other impermeable surfaces—the natural flow of water changes dramatically.

Increased runoff occurs because these impervious surfaces prevent water from soaking into the ground. Instead of being absorbed by vegetation and soil, rainfall quickly flows over these surfaces into waterways. This rapid movement of water can lead to higher peak flows in rivers and streams during and after rainfall events, ultimately contributing to elevated flood levels.

Additionally, urban development often alters natural drainage patterns, further exacerbating flooding issues. As a result, the alteration of the landscape through watershed development directly correlates with increased runoff and the potential for more severe flooding events. Understanding this relationship is crucial for effective floodplain management and planning, as it highlights the importance of considering how land use and development affect flood risks.