FEMA Flood With Distance to Stream, Storm Surge, Tsunami

We model large digital data sets into analog answers

Flood stage and inundation area: it's not just how high the river is

Often students have a difficult time realizing that the area of inundation for a flood depends not just on the stage, but also on the slope of the ground around the water. This is often expressed as students:

  • Wanting the flood to spread a fixed distance from the stream, independent of topographic changes viewing floods as primarily a lateral
  • Movement of water rather than a vertical change in the water level (they sometimes think they will get pushed perpendicular to the flow instead of downstream)
warter-area

Flood stage and inundation area

Flood forecasts are determined by examining past occurrences of flooding events, determining recurrence intervals of historical events, and then extrapolating to future probabilities. These calculations are often very difficult for students to understand because of the use difficult graphs to extrapolate data.

warter-flood
warter-flood-1

Flood stage and inundation area

Flood forecasts are determined by examining past occurrences of flooding events, determining recurrence intervals of historical events, and then extrapolating to future probabilities. These calculations are often very difficult for students to understand because of the use difficult graphs to extrapolate data.