Topography

How does the topography affect your flood risk?

Topography is the terrain that has been formed by geological processes such as uplift, erosion, and subsidence. For low-relief coastal plain areas the topography is primarily formed by the drainage features and the intervening land areas.

Topography is the key component for the flood zone risk maps. Low areas adjacent to rivers and streams are the highest risk for flooding. However, localized low features may contribute to flooding by causing water to pond. These areas may not be mapped as flood zones.

Example of a topographic map showing a stream