Flood Plain Land Use Controls Archives • ZoningTrilogy.com

Area of Shallow Flooding

An area within which the base flood depths range from one (1) to three (3) feet; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident.

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Base Flow

The part of river flow derived from groundwater seeping into the river.

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Breakwater

Means offshore coastal defense structures built of stone parallel to the coastline that help absorb the energy of breaking waves.

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Five Hundred Year Floodplain

That area covered by floodwater as a result of the flood having a one-fifth-of-one percent chance of being equaled or exceeded in any given year.

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Flood Elevation, Base

The highest elevation, expressed in feet above sea level, of the level of flood waters occurring in the regulatory base flood.

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Flood Fringe

That portion of the Flood Risk Area between the Floodway and the outer boundary of the Flood Risk Area.

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Flood Insurance Rate Map

The official map of the Town of XXX on which the Federal Insurance Administration has delineated the areas of special flood hazards and risk premium zones applicable to the town, as well as base flood elevations at selected locations.

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Flood Risk Area

The area of land below the 1 in 100 year flood elevation as shown on the Flood Risk Map.

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Flood tolerant activity

Flood tolerant activities are: informal recreation and leisure; organised sports and recreation including park fields structures; public amenities; farming and intensive farming and artificial crop protection structures and crop support structures; forestry; mineral extraction; car parking and loading areas; and buildings for network utilities.

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Flood, Designated

A flood which may occur in any given year, of such magnitude as to equal a flood having a 200 year-recurrence interval, based on a frequency analysis of unregulated historic flood records or by regional analysis where there is inadequate streamflow data available. Where the flow of a larger watercourse is controlled by a major […]

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Zoning Dictionary

Category: Flood Plain Land Use Controls

Flood tolerant activity