Floodways definition

Floodways means those portions of the floodplain where, during periods of (25- year/24-hour duration) flood, the water flow in the same general direction of the normal stream or river flow during non-flood periods.
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Floodways means the channel of any river, stream or other watercourse and the portions of the adjoining floodplain required to carry a discharge flood without raising flood waters and velocities more than a defined amount.
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Floodways means those portions of the floodplain where, during periods of (25- year/24-hour duration) flood, the water flow in the same general direction of the normal stream or river flow during non-flood periods. the channel of a river or other riverine watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than one foot.
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Examples of Floodways in a sentence

  • Floodways and floodplains, and levels of flood flows or velocities of adjacent streams, impoundments or other water courses must not be altered so as to adversely impact the off-site storage and conveyance capabilities of the water resource.

  • Table 1: Responsibilities for Planning Application Review with Respect to Environmental Features‌ Environmental Features Lead Agency Mandate Authority Planning Application and Policy Review Agency Technical Clearance Review Natural Hazards5 Flooding Hazards, Floodways and Floodplains NPCA PPS Section 3.1, MOU with Province, O.

  • The secondary source data shall include, but not be limited to information pertaining to the following: • Land Use (existing and planned), • Natural Resources (wetlands, streams, threatened and endangered species), • Cultural Resources (historic structures, archaeological sites), • Soils, • Community Features (churches, cemeteries, schools), • Socio‐Economic (census data, demographics, economics), • Floodplains and Floodways, and • Potential hazardous materials sites.

  • Provide maps showing the Floodplains, Floodways, and Floodway Fringes.

  • The requirements regarding an Individual CE have also changed for Floodways and Floodplains, as well as Air Quality conformity.


More Definitions of Floodways

Floodways means those areas, often aligned with obvious, naturally defined channels, where a significant passage of water flows during floods. They are often the deepest area where the highest velocities occur. Also, they are areas which, even if only partially blocked, would cause a significant redistribution of flood flow, which may in turn adversely affect other areas.
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