Surfacing of channel bed, banks, or embankment slope to
resist erosion and scour. (a) Natural process whereby an
erosion- resistant layer of relatively large particles is formed on
a streambed due to the removal of finer particles by
streamflow; (b) placement of a covering to resist erosion.
Rigid concrete slabs which can move without separating
as scour occurs; usually hinged together with corrosion-
resistant cable fasteners; primarily placed for lower bank
Velocity at a given cross section determined by dividing
discharge by cross sectional area.
A sudden change in the channel course that usually occurs
when a stream breaks through its banks; usually associated
with a flood or a catastrophic event.
The material used to refill a ditch or other excavation, or the
process of doing so.
The increase in water surface elevation relative to the elevation
occurring under natural channel and floodplain conditions. It is
induced by a bridge or other structure that obstructs or
constricts the free flow of water in a channel.
The low-lying lands adjacent to a stream that may become
flooded due to backwater.
The sides of a channel between which the flow is normally
bank, left (right):
The side of a channel as viewed in a downstream direction.
Discharge that, on the average, fills a channel to the point of
Engineering works for the purpose of protecting streambanks
Erosion-resistant materials placed directly on a streambank to
protect the bank from erosion.
An elongated deposit of alluvium within a channel, not
The floodplain associated with the flood with a 100-year
The bottom of a channel bounded by banks.