Hydroacoustic Evaluation of the Bonneville Dam Prototype Surface Collector in 1999
Abstract
This research effort had two primary objectives: (a) to test hydroacoustic sampling proposed for the year-2000 evaluation of the prototype surface collector (PSC); and (b)to evaluate a split-beam deployment upstream of a PSC slot and determine whether it provides reasonable estimates of fish passage relative to estimates from in-turbine transducers. For in-turbine passage, two pairs of up- and down- looking single-beam transducers mounted on trashracks in each of the three slots in Unit 5 were used to estimate the number of juvenile salmon passing under and into the PSC. Each opposing pair of transducers was fast multiplexed at a rate of 20 pings per second (10 each) for a 2-min period before switching to another opposing pair. All in-turbine counts of fish were spatially expanded based upon the ratio of one-half of the intake width to the diameter of the hydroacoustic beam at the midrange of the detected fish. Fish passage into and fish behavior in front of the PSC were monitored with three pairs of up- and down-looking split-beam transducers mounted on a steel flame and placed upstream of the PSC trashrack at turbine intake 5b. Two of the transducer pairs were located 2 m to either side of the middle of the slot to sample fish on the north and south sides of the PSC entrance. The third pair was placed in the middle of the slot to sample fish near the center of the entrance. Each pair of opposing transducers was fast-multiplexed at 10 pings per second each for 20 min per hour.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADA388388
Entities
People
- Carl R. Schilt
- Gene R. Ploskey
- Larry R. Lawrence
- Peter N. Johnson
- William T. Nagy
Organizations
- Engineer Research and Development Center