Flood Types
What is a flood?
the temporary flow of water over normally dry land.
What is Cyclone Narelle?
This tropical cyclone was mentioned in the breaking news last week.
BONUS
Next Questions is worth double points!
Name one social impact of flooding
Social impacts: displacement, loss of life, mental health, people forced to leave homes, etc.
What is a coastal flood?
type of flood occurs in coastal areas when sea water inundates low‑lying land, often worsened by high tides.
What are infiltration, evaporation, and runoff?
When rain falls, these are the three main pathways water can take.
What is the category system?
scale is used to categorize tropical cyclones based on wind speed. (F1 to F5)
Name one online tool or website listed in the lesson to assess flood risk
Victoria SES Flood Guides, FloodMap.net, or Bureau of Meteorology flood page
What are the EEs in SHEEPT?
In the SHEEPT factors, this letter stands for “Environment / Ecosystems & Economic”
What are slow‑onset floods?
These floods last several weeks or months and allow time for preparation.
What is infiltration?
This is the process by which water on the ground surface enters the soil.
What is a storm surge?
the rise in sea level caused by strong cyclone winds can flood coastal areas.
True or false: Modifying the flow of rivers always reduces flood risk everywhere
FALSE
List one economic cost that can result from a major flood.
economic cost: damage to buildings, infrastructure repair, business loss, etc.
What is a flash flood?
These short, intense floods often come from thunderstorms and give very little warning.
What is an impervious surface?
a hard surface that prevents or greatly reduces water soaking into the ground.
What is a tornado?
It is a type of storm features a rotating column of air touching the clouds and the ground.
What is 1% flood planning risk?
It is a flood that happens 1‑in‑100 years
Name one positive impact that flooding can have on the environment.
positive impact: recharges groundwater, deposits fertile silt, supports wetlands, etc.
What impervious surfaces (concrete, asphalt) can cause to runoff water?
causes a flash flood in urban areas, even when rain isn’t extremely heavy.
In mountainous areas, which two factors combine to make rapid‑onset floods?
steep gradient landscape and high rainfall
What is the wet / monsoon season? BONUS: When?
In Australia, this season is when tropical cyclones most commonly occur (Summer, November–April).
What is called acronym stands for the likelihood of a flood of a particular magnitude occurring in any given year?
AEP (Annual Exceedance Probability)
Name two ways humans can respond to flood risk (mitigation techniques)
levees, flood barriers, land‑use planning, warning systems, etc.
List two less common causes of flooding (not rainfall or storm surge)
Any two: dam failure, landslides blocking rivers, earthquakes, volcanic activity (lahars)