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  2. Flood opening - Wikipedia

    en.wikipedia.org/wiki/Flood_opening

    The American Society of Civil Engineers (ASCE) requirements apply to any structure that is not dry flood-proofed and which is in the mapped flood zone. It calls for openings in load-bearing foundation walls located below the mapped flood elevation. Where non-engineered openings are used, each opening must be at least three inches in diameter ...

  3. BFE - Wikipedia

    en.wikipedia.org/wiki/BFE

    BFE may refer to: . Bacterial Filtration Efficiency, a measurement of filtration efficiency of filtration systems such as surgical face masks; Base Flood Elevation, a level set by the Federal Emergency Management Agency based on 100 year flood models; see Flood opening

  4. Flood stage - Wikipedia

    en.wikipedia.org/wiki/Flood_stage

    Flood stage is the water level, as read by a stream gauge or tide gauge, for a body of water at a particular location, measured from the level at which a body of water threatens lives, property, commerce, or travel. [1] The term "at flood stage" is commonly used to describe the point at which this occurs.

  5. What is a flood elevation certificate? - AOL

    www.aol.com/finance/flood-elevation-certificate...

    A Federal Emergency Management Agency (FEMA) flood elevation certificate provides specific property elevation information and may be especially beneficial for homeowners in high-risk flood zones ...

  6. National Flood Insurance Program - Wikipedia

    en.wikipedia.org/wiki/National_Flood_Insurance...

    In this sense, a base flood is synonymous with a 100-year flood and a floodplain is synonymous with a special flood hazard area. This base flood "is used in the National Flood Insurance Program (NFIP) to indicate the minimum level of flooding to be used by a community in its floodplain management regulations."

  7. High water mark - Wikipedia

    en.wikipedia.org/wiki/High_water_mark

    This may be a free-standing flood level sign or other marker, or it may be affixed to a building or other structure that was standing at the time of the flood that set the mark. [ 3 ] A high water mark is not necessarily an actual physical mark, [ 4 ] but it is possible for water rising to a high point to leave a lasting physical impression ...

  8. 100-year flood - Wikipedia

    en.wikipedia.org/wiki/100-year_flood

    A 100-year flood is a flood event that has on average a 1 in 100 chance (1% probability) of being equaled or exceeded in any given year. [1] A 100-year flood is also referred to as a 1% flood. [2] For coastal or lake flooding, a 100-year flood is generally expressed as a flood elevation or depth, and may include wave effects. For river systems ...

  9. Fluvial terrace - Wikipedia

    en.wikipedia.org/wiki/Fluvial_terrace

    Fluvial terraces can be used to measure the rate at which either a stream or river is downcutting its valley. Using various dating methods, an age can be determined for the deposition of the terrace. Using the resulting date and the elevation above its current level, an approximate average rate of downcutting can be determined. [6]

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