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US 2025/0109559 A1Published application
Zero-ascend omnispecies (zao) prefabricated fish passage attraction system
AssigneeLittoral Power Systems, Inc.
InventorsDavid J. Duquette, Katherine Leighton, Luke Graham, Vincent Bryan
Life of this patent
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Abstract
Zero-ascend omnispecies (ZAO) attraction system includes a fish passage attraction module that can be deployed in a fishway where water flows downstream. The fish passage attraction module includes a body having a first end and an opposite second end, first adaptor adjacent the first end and second adaptor adjacent the second end. The adaptors are configured to alter water flow fields downstream of the module so as to attract fish to an entrance thereof.
Claims20
A module comprising:
- a floating, partially submergible body;
- a mooring apparatus that connects the body to a riverbed, the mooring apparatus configured to allow the body to move up and down with water elevation;
- and
- an adaptor adjacent the body, the adaptor having a tapered structure so as to alter a plurality of flow fields adjacent the body, wherein a first flow field of the plurality of flow fields is slower than a second flow field of the plurality of flow fields, and wherein the first flow field is closer to a central longitudinal axis than the second flow field such that greater number of fish is attracted to move toward the first flow field than the second flow field.
1 more element
A module comprising:
- a floating, partially submergible body having a downstream end and an upstream end opposite the downstream end;
- a mooring apparatus that connects the body to a riverbed, the mooring apparatus configured to allow the body to move up and down with water elevation;
- first adaptor adjacent the downstream end of the body, the first adaptor having first geometric structure so as to alter a plurality of flow fields adjacent the body, wherein a first flow field of the plurality of flow fields is slower than a second flow field of the plurality of flow fields, and wherein the first flow field is closer to a central longitudinal axis than the second flow field such that greater number of fish is attracted to move toward the first flow field than the second flow field;
- and
- second adaptor adjacent the upstream end of the body, the second adaptor having second geometric structure so as to alter at least one of the first flow field and the second flow field.
2 more elements
A zero-ascend omnispecies (ZAO) attraction system comprising:
- a facility where water flows downstream;
- and
- a fish passage module located downstream of the facility, the module comprising:
- a floating, partially submergible body having a first end and a second end opposite the first end;
- a mooring apparatus that connects the body to a riverbed of the facility, the mooring apparatus configured to allow the body to move up and down with water elevation;
- first adaptor adjacent the first end of the body, the first adaptor having first geometric structure so as to alter a plurality of flow fields adjacent the body, wherein a first flow field of the plurality of flow fields is slower than a second flow field of the plurality of flow fields, and wherein the first flow field is closer to a central longitudinal axis than the second flow field such that greater number of fish is attracted to move toward the first flow field than the second flow field;
- and
- second adaptor adjacent the second end of the body, the second adaptor having second geometric structure so as to alter at least one of the first flow field and the second flow field.
5 more elements
Dependencies are inferred from the claim text.