Certified Floodplain Manager (CFM) Practice Exam 2026 – Complete Preparation Guide

A 500 Year Flood means that the probability of such a flood occurring in any given year is 1 in 500 or 0.2%. A 50 Year Flood has a probability of 1 in 50 or 2%. An Annual Flood means that this level of flooding occurs every year, making it a less severe event than a 100 Year Flood. In terms of the Base Flood, the 100 Year Flood is used as a standard benchmark for flood risk assessments and insurance purposes, making it the most well-known and important designation. Therefore, the correct answer is C 100 Year Flood.