Which areas are included in the definition of floodway?

The definition of floodway primarily encompasses the channel of a natural stream and the adjacent floodplain. This is significant because the floodway is designed to facilitate the passage of floodwaters while minimizing flood risks to people and property. Understanding this definition is vital for the accurate assessment of flood hazards and the implementation of appropriate land use regulations.

In the context of flood risk management, identifying areas within a floodway is essential for zoning and building regulations. It allows for the protection of waterways and helps guide development away from high-risk areas to protect both the environment and public safety.

The other areas mentioned, such as only residential areas, all developed urban zones, or coastal areas only, do not encompass the entire scope of a floodway. The floodway isn't limited to specific types of land use or geographic characteristics but is fundamentally linked to the behavior of water flow in natural conditions. This makes the channel and adjacent floodplain the most accurate and relevant components when defined as a floodway.