BACKWATER STRUCTURE Russian patent published in 2005 - IPC

FIELD: hydraulic structures, particularly to provide banking and regulation of water, mud-and-stone and other flows, for accident elimination, namely in the case of varnish-and-paint or oil product effluent.

SUBSTANCE: backwater structure comprises webs of variable widths arranged through watercourse width, secured to watercourse floor and connected to rope system by upper edges thereof. Webs are made of separate strips having different lengths and connected by flexible tie members. Strips form water outlet windows located in upper and bottom structure parts. Area of water outlet windows located in bottom structure parts is 0.7 of that of water outlet windows formed in upper structure part. Structure is provided with impact baffle having height of 0.2-0.5 H, where H is structure height. Impact baffle is spaced a distance not less than H from webs. Impact baffles may be arranged in cascade manner and have decreasing heights. Structure may have filtering collecting webs connected to rope system, apron, collecting reservoir and removal means connected by flexible tie members with collecting reservoir. Upper filtering collecting web part is not less than 11 heights of water level in upper pool and is not more than removal means height.

EFFECT: possibility to obtain design water flow level and provision of water level regulation in pools, improved ability to collect pollutants, possibility to use structure in emergency conditions, namely during forest fire extinguishing.

3 cl, 2 dwg