Laserfiche WebLink
<br />e <br /> <br />Sloughing - Shallow movement of a soil mass down a streambank as the result of an <br />instability condition at or near the toe (also called slumping). Conditions <br />leading to sloughing include: bed degradation, attack at the bank toe, rapid <br />draw-down, and slope erosion to an angle greater than the angle of repose of <br />the material. <br /> <br />Soil-Cement - A designed mixture of soil and portland cement compacted at a proper <br />water content to fonn a veneer or sttucture that can prevent streambank <br />erosion. <br /> <br />Spur dike - See dike. <br /> <br />Stabilizer - A low sill across a channel, used to prevent bed erosion. <br /> <br />Stable channel - A condition that exists when a stream has developed the right bed slope <br />and cross section for its channel to transport the water and sediment <br />delivered from the upstream watershed without any cumulative sediment <br />deposition or erosion of the bed or banks. <br /> <br />Stage - Water-surface elevation of a stream with respect to a reference elevation. <br /> <br />Stone riprap - Natural cobbles, boulders, or rock dumped or placed on a streambank or <br />filter as protection against erosion. <br /> <br />Streambank erosion - Removal of soil particles or a mass of particles from a bank <br />surface due primarily to water action. Other factors such as weathering, ice <br />and debris abrasion, chemical reactions. and land-use changes may also <br />directly or indirectly lead to streambank erosion. <br /> <br />Streambank failure - Collapse of a bank due to instability. <br /> <br />Streambank protection - Any technique used to prevent erosion or failure of a <br />streambank. <br /> <br />Structural protection - Any means of bank protection involving the construction or <br />placement of materials and/or structures to protect streambanks from <br />erosion. <br /> <br />Subchannel - A channel inside a larger 1I00d control channel that is used to convey low <br />and/or nonnalllows. <br /> <br />Substrate - Surface to which stream biota adhere or within which they live. <br /> <br />Suspended-sediment load - That part of a stream's total sediment load which transported <br />within the body of lIuid and has very little contact with the bed. <br /> <br />Thalweg. A line extending down a channel that follows that lowest elevation of the <br />bed. <br /> <br />e <br /> <br />Tieback - Structure placed between revetment and bank to preventllanking. <br /> <br />Colorado Erosion Control Manual <br /> <br />XXIII <br />