Laserfiche WebLink
<br />Flanking .. Erosion resulting from streamflow between the eroded bank and the <br />landward end of a river-training or a grade-control structure. <br /> <br />Floodway - The channel of a stream and those portions of the flood planes adjoining the <br />channel, which are required to carry and discharge the flood water. <br /> <br />Flow slide - Saturation of a bank to the point where the soil material behaves more like <br />more like a liquid than a solid; the soil/water mixture may then move <br />downslope resulting in a bank failure. <br /> <br />Flume - All open channel constructed of wood, steel, or reinforced concrete and used to <br />convey water for various purposes, including grade control. <br /> <br />Fonn liner - A liner for concrete fonns designed to produce a special finish. <br /> <br />Gabion - A wickerworlc or wire mesh basket or cage filled with stone or other materials <br />placed against a streambank to prevent erosion. <br /> <br />Geomorphology - That branch of both physiography and geology that deals with the <br />fonn of the earth, the general configuration of its surface, and the changes <br />that take place due to erosion of the primary elements and in the buildup of <br />erosional debris. <br /> <br />Grade control structure - Any of several types of structures used to control erosion on <br />channels usually with steep grades (see sill, stabilizer, drop structure, and <br />flume). <br /> <br />Gravel - Particles of stone that can pass a 3-in. (76.2 mm) and be retained on a No.4 <br />(4.76 mm) U. S. Standard Sieve (Unified Soil Classification System. <br /> <br />Greentree reservoir - A shallow reservoir in which water levels are manipulated for <br />wildlife and timber production. <br /> <br />Groundwater flow - That portion of the discharge of a stream which is derived entirely <br />from ground water, through springs or seepage water. <br /> <br />Grout - A fluid mixture of cement and water or of cement, sand, and water used to fill <br />joints and voids. <br /> <br />Hard point - A streambank protection technique wbereby "soft" or erodible materials <br />are removed from a bank and replaced by stone or compacted clay. Some <br />hard points protrude a short distance into the channel to direct erosive <br />currents away from the bank. Hard points also occur naturally along <br />streambanks as passing currents remove erodible materials leaving non- <br />erodible materials exposed. <br /> <br />Headeut - A point of abrupt change in the longitudinal profile of a stream. Headcuts <br />typically migrate upstream through time. <br /> <br />XVIII <br /> <br />Colorado, Erosion Control Manual <br />