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Last modified
1/25/2010 7:09:12 PM
Creation date
10/5/2006 2:20:47 AM
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Template:
Floodplain Documents
County
Statewide
Basin
Statewide
Title
Colorado Erosion Control Manual
Date
11/1/1992
Prepared For
CWCB
Prepared By
USGS
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />e <br /> <br />Avulsion - A change in channel course that occurs when a sm:am suddenly breaks <br />through its banks; usually associated with a catastrophic event. <br /> <br />Backwate - area - The low-lying lands adjacent to a stream that may become flooded <br />during periods of high water. <br /> <br />Baffle - A plate. wall, screen, or other device to deflect or impede flow. <br /> <br />Bank . Th ~ side slopes of a channel between which the streamflow is nonnally confined. <br /> <br />Backfill- The material used to refill a ditch or other excavation, or the process of doing <br />so. <br /> <br />Bankfull .lischarge - On undisturbed natural streams. the discharge that fills the channel <br />to bankfull and usually having a recurrence interval of 1.5 to 2 years based <br />on the annual series. In ENDOW bankfull discharge is defined as the Q2.0. <br /> <br />Bar - A s:md or grnvel deposit found on the bed of a stream that is often exposed only <br />during low-water periods. <br /> <br />Bed - The bottom of a channel. <br /> <br />Bedload - Sediment that moves by saltation (jwnping), rolling, or sliding in the bed <br />layer of a stream. <br /> <br />Bedrock - The solid rock underlying soils and overlying the mantle rock, ranging from <br />surface exposure to depths of several hundred feet. <br /> <br />Bed slope - The change in bed elevation in a unit channel length horiwntal distance. <br /> <br />Bend - A change in the direction of a stream channel. <br /> <br />Benthic - Of. pertaining to. or related to tbe bottom of a stream or body of water. <br /> <br />Berm - A lerrace or ledge formed within a channel at the base of the streambank. Also a <br />terrace or ledge cut on a slope or at the top of an embankment to divert water <br />or inteICept sliding earth. <br /> <br />Blanket - Material covering all or a portion of a streambank to prevent erosion. <br /> <br />Boatway - A reach of stream developed for boating or canoeing. <br /> <br />Braided stream - A relatively wide and shallow stream with multiple channels formed <br />by islands and bars in the waterway. <br /> <br />Brush mal tress - A thick layer of brush placed on a streambank or slope and held in <br />place by wires and stakes. <br /> <br />Buffer zones - Areas of trees, grass, or other vegetation located between top bank and <br />adjacent pastures or cultivated fields (also called greenbelts). <br /> <br />e <br /> <br />XIV <br /> <br />Colorade. Erosion Control Manual <br />
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