Bankfull width definition

Bankfull width means the width of the surface of the water at the point where water just begins to overflow into the active flood plain. In streams where there is no flood plain, it is often the width of a stream or river at the dominant channel forming flow that reoc- curs every one to two years.
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Bankfull width means the elevation or line where the water fills the channel just before beginning to spill onto the floodplain.
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Bankfull width means: (a) For streams - The measurement of the lateral extent of the water surface elevation perpendicular to the channel at bankfull depth. In cases where multiple channels exist, bankfull width is the sum of the individual channel widths along the cross-section (see board manual section 2).
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Examples of Bankfull width in a sentence

  • Bank-full width is generally considered to be the top width at the stage where a stream begins to overtop its banks and spread into the floodplain.

  • Bankfull width is used because it best approximates the width between the points on either side of the stream where riparian vegetation starts.

  • Bankfull width (m) is measured where the water level would be if the streamflow was at maximum but not flood stage.

  • Bankfull width is determined by using visual clues such as water or scour marks, bank terraces and bank vegetation that provide evidence to the bankfull level.

  • ER = Floodprone width / Bankfull width) Method: Using common survey equipment and techniques at cross sections established within a riffle, measure bankfull width and elevation and maximum channel depth.

  • Bankfull width is “the discharge at which channel maintenance is the most effective, that is, the discharge at which moving sediment, forming or removing bars, forming or changing bends and meanders, an generally doing work that results in the average morphologic characteristics of channels.” Dunne and Loepold (1978).

  • Bankfull width is the width of the stream just prior to the moment a stream floods, or spillsout of its banks.

  • Bankfull width see the Sustainable Planning Regulation 2009.Editor’s note: Bankfull width has the meaning given by the minor waterway barrier works code.

  • Bankfull width - A measure of wetted channel width at bankfull discharge.

  • Bankfull width can be described as the flow that just fills the stream channel to the top of its nearest banks but below a point where the water begins to overflow onto a floodplain.

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