Porous and solid rock weirs are channel spanning rock structures that are installed to (1) center, and sometimes create, a stream thalweg; (2) protect streambanks by redirecting stream flow; (3) establish and maintain a lower width to depth ratio; (4) provide fish passage by concentrating low flows in flat-bottomed channels into narrower, deeper...

A rock weir is a relatively small, pervious dam-like structure that slows water flow and releases water in a controlled manner. A series of rock weirs may be necessary to prevent erosion in relatively long sloping waterways.

River-spanning rock weirs are constructed for water delivery, bank stabilization, grade control, fish passage, and to improve aquatic habitat for endangered fi sh species. Current design methods are based upon anecdotal information applicable to a narrow

The term "weir" is used here to refer to any structure spanning the stream that produces a drop in the water surface elevation. These structures are frequently made of angular quarried stone, but logs, sheet piling, concrete, boulders and masonry are also quite common.

2010年1月23日 · Porous and solid rock weirs are channel spanning rock structures that are installed to (1) center, and sometimes create, a stream thalweg; (2) protect streambanks by redirecting stream flow; (3) establish and maintain a lower width to depth ratio; (4) provide fish passage by concentrating low flows in flat-bottomed channels into narrower, deeper...

Rock weirs are small dam-like structures composed of large loose rock commonly found in ecological engineering design. By appearing more natural than concrete structures, rock weirs are preferred for use as hydraulic control structures in river engineering, stormwater management, and constructed wetlands.

2007年1月1日 · River spanning loose-rock structures provide sufficient head for irrigation diversion, permit fish passage over barriers, protect banks, stabilize degrading channels, activate side channels, reconnect floodplains, and create in-channel habitat.