Flood frequency definition

Flood frequency means the probability of a flood occurrence which is determined from statistical analyses. The frequency of a particular flood event is usually expressed as occurring, on the average once in a specified number of years or as a percent (%) chance of occurring in any given year.
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Flood frequency means the frequency for which it is expected that a specific flood stage or discharge may be equaled or exceeded.
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Flood frequency means the average frequency, statistically determined, for which it is expected that a specific flood stage or discharge may be equaled or exceeded. This frequency is usually expressed as having a probability of occurring, on the average, once within a specified number of years.
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Examples of Flood frequency in a sentence

  • The required Design Flood frequency depends upon roadway classification as described below.

  • Comparison of uncertainty sources for climate change impacts: Flood frequency in England.

  • Flood frequency and severity have increased significantly since 1998.

  • Flood frequency curves and calibrated model data sets for the Giralang, Mawson, and Curtin catchments may be obtained from the operating authority.

  • Flood frequency analysis for two stations is included in appendix II.

  • Flood frequency, calculated as the number of flood events in a year, was unrelated to survival of all species combined.

  • The outcome indicators in DMF have an indicator closely relating to environment, i.e. Fenggang River Flood frequency reduced from annual to once in 20 years.

  • Flood frequency analysis of flood events and its concurrent relationship with the damage or losses in the basin or nearby areas of the site of interest.

  • Flood frequency curves are derived from observed historical flood records.

  • Flood frequency studies assuming Gumbel‘s extreme value distribution.5. Determination of peak flood discharge in a basin using unit hydrograph technique.6. Determination of storage capacity of a reservoir using mass curve of inflow and outflow.7. Application of HEC-RAS for Hydrologic routing.8. Site visit to Meteorological station9.


More Definitions of Flood frequency

Flood frequency means a frequency normally expressed as a period of years, based upon a percent chance of occurrence in any given year from statistical analysis, during which a flood of a stated magnitude may be expected to be equaled or exceeded, as in the two-year flood frequency has a 50% chance of occurrence in any given year and the 100-year flood frequency has a 1% chance of occurrence in any given year;
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Flood frequency means a statistical expression of the average time period between floods equaling or exceeding a given magnitude.
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Flood frequency means a period of years, based on a statistical analysis, during which a flood of a stated magnitude may be expected to be equaled or exceeded.
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Flood frequency means the average frequency, statistically determined, for which it is expected that a specific flood stage or discharge may be equaled or exceeded.
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Flood frequency means the probability of a flood occurrence which is determined from
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Related to Flood frequency

  • Tidal Flood Hazard Area means a flood hazard area in which the flood elevation resulting from the two-, 10-, or 100-year storm, as applicable, is governed by tidal flooding from the Atlantic Ocean. Flooding in a tidal flood hazard area may be contributed to, or influenced by, stormwater runoff from inland areas, but the depth of flooding generated by the tidal rise and fall of the Atlantic Ocean is greater than flooding from any fluvial sources. In some situations, depending upon the extent of the storm surge from a particular storm event, a flood hazard area may be tidal in the 100-year storm, but fluvial in more frequent storm events.

  • Flood hazard area means any area subject to inundation by the base flood or risk from channel migration including, but not limited to, an aquatic area, wetland, or closed depression.

  • Special Flood Hazard Area means an area that FEMA’s current flood maps indicate has at least a one percent (1%) chance of a flood equal to or exceeding the base flood elevation (a 100-year flood) in any given year.

  • Flood fringe means the portion of the floodplain outside the floodway that is usually covered with water from the 100-year flood or storm event. This includes, but is not limited to, the flood or floodway fringe designated by the Federal Emergency Management Agency.

  • Flood Program means the National Flood Insurance Program created by the U.S. Congress pursuant to the National Flood Insurance Act of 1968, the Flood Disaster Protection Act of 1973, the National Flood Insurance Reform Act of 1994 and the Flood Insurance Reform Act of 2004, in each case as amended from time to time, and any successor statutes.

  • Area of special flood hazard means the land in the floodplain within a community subject to a one percent or greater chance of flooding in any given year.

  • Flood proofing means any combination of structural and non-structural additions, changes, or adjustments to structures which reduce or eliminate flood damage to real estate or improved real property, water and sanitary facilities, structures and their contents.

  • Flood Zone means areas having special flood hazards as described in the National Flood Insurance Act of 1968, as amended from time to time, and any successor statute.

  • Flood or flooding means a general and temporary condition of partial or complete inundation of normally dry land areas from:

  • Base flood elevation (BFE) means the elevation shown on the Flood Insurance Rate Map for Zones AE, AH, A1-30, VE and V1-V30 that indicates the water surface elevation resulting from a flood that has a 1-percent or greater chance of being equaled or exceeded in any given year.

  • Flood Insurance Study means the official report provided by the Federal Insurance Administration that includes flood profiles, the Flood Insurance Rate Map, the Flood Boundary and Floodway Map, and the water surface elevation of the base flood.

  • Fire hazard means any situation, process, material or condition which may cause a fire or explosion or provide a ready fuel supply to increase the spread or intensity of the fire or explosion and which poses a threat to life or property;

  • Flood Hazard Property means any Real Estate Asset subject to a mortgage in favor of Collateral Agent, for the benefit of Secured Parties, and located in an area designated by the Federal Emergency Management Agency as having special flood or mud slide hazards.

  • Airport hazard means any structure, object of natural growth, or use of land which obstructs the airspace required for the flight of aircraft in landing or taking off at an airport, or is otherwise hazardous to such landing or taking off of aircraft.

  • Flood plain means land that: