Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1979-04-19
1981-04-07
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
405 81, E02B 808
Patent
active
042602866
ABSTRACT:
A system for use at dams, diversion canals, and the like includes a fish ladder for enabling fish to travel both upstream and downstream without injury past man-made obstacles such as dams. The fish ladder comprises a series of dish-like compartments to which water is made to flow from top to bottom. Auxiliary water input to each dish in the series is maintained to create the desired turbulence and flush debris from the ladder. Also included is a power predator seine chamber at the bottom of the fish ladder for chumming predator fish from the waters at the bottom of the fish ladder. The predator fish can be sorted out when the seine is raised. Repetitive traveling screens move through the water and allow the removal of water from a body of water without removing or damaging fish therein. The screen's rotation, size of the screen material, and the angle of the screen to primary water flow allow the migrating fish to keep moving in the desired direction while large volumes of water are diverted. Another component of the system is a multi-point discharger for providing water discharge from a dam or the like. The discharger includes a large pipe with numerous small openings for discharging the water as a multitude of small streams of water. The resulting discharge eliminates the confusion in upstream migrants which results from present water discharge systems. The upstream migrating fish are thus more quickly and easily able to find the fish ladder. Also, an optional fish return is provided for those situations where two rivers having migrating fish therein are coupled together by a canal.
REFERENCES:
patent: 769910 (1904-09-01), Melbye
patent: 1573785 (1926-02-01), Albright
patent: 2763991 (1956-09-01), Kennon
patent: 3338056 (1967-08-01), Roscoe
Boone David A.
Jones Allston L.
Taylor Dennis L.
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