Animal husbandry – Aquatic animal culturing – Fish culturing
Patent
1993-06-22
1995-08-29
Manahan, Todd E.
Animal husbandry
Aquatic animal culturing
Fish culturing
405127, 340852, H04B 1302
Patent
active
054451116
ABSTRACT:
A variety of electrified fish barriers are suitable for diverting fish from protected structures, e.g. pump intakes. Most take the form of linear curtain arrays (i.e. arrays of fixedly spaced-apart vertical elements). Many are characterized by the use of three or more pulsed driving signals of different voltages. This results in an electrical field pattern that extends broadside of the array, permitting fish an opportunity to turn and swim away before reaching a dangerous field strength. One barrier advantageously integrates the electrodes with a physical control structure that can be used to equalize the through-barrier water flow along its length. Others employ sets of electrodes that are driven in staggered, time-multiplexed fashion so as to reduce peak power requirements. Barriers used to screen pump intakes on the sides of flowing waterways are desirably sized and placed so that the velocity of water flow through the barrier is one-half, or less, of the waterway bypass flow adjacent the barrier. Other barriers include electrodes with horizontal and vertical sections (i.e. "U" shaped), while still others have electrodes that are driven at both ends. A variety of other details are also disclosed.
REFERENCES:
patent: 2146105 (1939-02-01), Baker
patent: 2233045 (1941-02-01), Bonner et al.
patent: 2778140 (1957-01-01), Applegate et al.
patent: 2826897 (1958-03-01), Vinsonhaler et al.
patent: 4580525 (1986-04-01), Marzluf
patent: 4750451 (1988-06-01), Smith
patent: 5078542 (1992-01-01), Yoshikawa et al.
"Conceptual Report Proposed Installation of an Electrical Fish Barrier at Pump House 2," Prepared by Smith-Root, Inc., Jul. 1, 1992, 52 pages.
Andrew et al., "Electric Screens for Adult Salmon," International Pacific Salmon Fisheries Commission, 1956, 43 pages.
Smith-Root, Inc. GFFB/GFFG Fish Barrier & Guidance Systems, Jan., 1992, 20 pages.
Stewart, "Electric Screens," International Symposium on Fishing with Electricity, Oct. 3, 1988, 8 pages.
Davis, "An Investigation of Barriers to Introduction of Fish into Granite Reef Dam Forebay From an Interconnection with the Cap Aqueduct", Environmental Services Department, Jul., 1984, 18 pages.
McLain, "The Control of the Upstream Movement of Fish with Pulsated Direct Current," U.S. Department of the Interior, pp. 269-284.
McLain et al., "Directing the Movement of Fish with Electricity," U.S. Department of the Interior, Jan., 1953, 24 pages.
Burrows, "Diversion of Adult Salmon by an Electrical Field," U.S. Department of the Interior, Dec., 1957, 11 pages.
Stewart, "Electrified Barriers for Marine Fish," International Symposium on Fishing with Electricity, 26 pages.
Brett et al., "Research on Guiding Young Salmon at Two British Columbia Field Stations," Bulletin No. 117, 1958, pp. 29-57.
Holmes, "History, Development, and Problems of Electric Fish Screen," Special Scientific Report No. 53, U.S. Department of the Interior, Jun., 1948, 62 pages.
"Impingement and Entrainment: An Updated Annotated Bibliography," EPRI EA-1855, The Atomic Industrial Forum, Inc., May, 1981, 317 pages.
Cada et al., "A Biological Evaluation of Devices Used for Reducing Entrainment and Impingement Losses at Thermal Power Plants," Publication No. 1276, Environmental Sciences Division, 1978, 50 pages.
"General Fish Screening Criteria," California Department of Fish and Game, Feb. 1993, 2 pages.
"Fish Screening Criteria for Anadromous Salmonids," National Marine Fisheries Service Southwest Region, Apr. 1992, 8 pages.
"The Establishment and Operation of Electrical Barriers to Sea Lamprey Migration on the Canadian Tributaries to Lake Superior," Fisheries Research Board of Canada, Sep., 1959, 21 pages.
Manahan Todd #E.
Smith-Root, Inc.
LandOfFree
Electrified fish barriers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrified fish barriers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrified fish barriers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1813299