DEBRIS FLOW DRAINAGE CANAL BASED ON CASCADE ANTISCOUR NOTCHED SILL GROUP AND APPLICATION THEREOF
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United States of America Patent
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Issued Date -
Mar 28, 2013
app pub date -
Jun 10, 2011
filing date -
Jun 11, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system of debris-flow drainage canal with cascaded sills is provided, which allows a high-efficient and low-cost realization of debris flow drainage and scour prevention. The canal contains two converging walls and a series of scour prevention sills, which are laid between the two converging walls. The sills are embedded to a certain depth and are evenly spaced and symmetrical to the centre line of the canal to form a cascaded structure for scour prevention. The drainage canal's width is 2 times wider than the sill's horizontal length along the cross-section. Compared with the prior art, this system can drain off a wide variety of flows from debris flow to flood and prevent debris-flow siltation even on a gentle slope. This system has a much higher stability and longer life of service. Moreover, this system can maintain the aquatic habitat in gullies and contribute to ecological restoration.
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