Urbanization/impervious surfaces can affect 100 year flood designation

Time line chart showing how a 100 year flood designation can change over time due to increase in impervious surfaces..

Detailed Description

The "100-year flood" of yesterday may not be the "100-year flood" of today. Changes in local land use, new river impoundments, changes in the amount of impervious surfaces, and long-term climate patterns can affect at what point a "100-year flood" is designated. 


Image Dimensions: 499 x 373

Location Taken: US