Patent ID: 6726404
Filing Date: 2004-04-27
Classification: E02B,Y02A

Abstract:
A method that assists waterborne fauna in avoiding contact with a diversion screen having an upstream and a downstream side said, diversion screen installed in a waterway and useful to some extent for diversion of said fauna, comprising:adding at least one feature to said downstream side said of diversion screen, in which said adding at least one feature comprises affixing rows of elements, each said element having a length, a width and a depth, said length being longer than said width and said width equal to or longer than said depth, to the downstream side of said diversion screens, wherein said elements are arranged with said length approximately perpendicular to the longest dimension of structural material used to construct said diversion screens, and wherein said feature enables simulation of at least one natural hydraulic cue of which said fauna are receptive so as to initiate an instinctive awareness in said fauna to avoid said diversion screen, and wherein the absence of said at least one feature may result in said fauna contacting said barrier at harmful velocities, and wherein said elements are affixed to said diversion screens in spacing and dimension by using standard engineering methods that may also accommodate requirements not related to simulating said natural hydraulic cue.