American Institute of Certified Planners (AICP) Practice Exam

How can a floodplain be best described?

1. A region that is prone to surface flooding during storms

2. A highly urbanized area

3. An area rich in wildlife

4. A site for industrial development

The correct answer is: A region that is prone to surface flooding during storms

A floodplain can be best described as a region that is prone to surface flooding during storms. This definition captures the essential characteristic of a floodplain, which is its ability to store excess water from rivers or streams during periods of high rainfall or snowmelt. Floodplains are typically low-lying areas adjacent to water bodies and are naturally affected by flooding events. The presence of these flood-prone areas is significant for urban planning, as they help in understanding the potential risks to development and infrastructure. Other options do not accurately define a floodplain. While urbanized areas or industrial sites can sometimes be found within or near floodplains, they do not inherently characterize the landscape's hydrological function. An area rich in wildlife may be a characteristic of some floodplains, but it does not comprehensively describe the primary feature of flooding risk. Hence, the definition of a floodplain centers around its propensity for flooding, making the first choice the most accurate representation.