Practice Quiz

Civil Engineering PE

Category - Hydraulics - Open

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Which of the following best describes the term “base flood”?
  1. The elevation of the crest of the base or 100-year flood
  2. The flood having a 1% chance of being equaled or exceeded in any given year
  3. A general and temporary condition of partial or complete inundation of normally dry land areas
  4. A condition of flooding where there is moving water, but no identifiable channel
Explanation
Answer: B - A base flood is best described as the flood having a 1% chance of being equaled or exceeded in any given year. The Federal Emergency Management Agency (FEMA) refers to this flood as the “100-year” or “1% chance” flood. The base flood delineation is only a statistically based boundary developed using HEC-RAS or other computerized hydraulic and hydrologic model and is developed for the National Flood Insurance Program to ensure all participating properties are protected to the same degree against flooding.
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