Accession Number:

ADA343852

Title:

Hydroacoustic Evaluations of Juvenile Salmonid Passage at Bonneville Dam Including Surface-Collection Simulations.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Report Date:

1998-04-01

Pagination or Media Count:

200.0

Abstract:

Ths technical report describes results of studies conducted by the U.S. Army Engineer District, Portland, and the U.S. Army Engineer Waterways Experiment Station to resolve critical uncertainties in the implementation of surface-collector technologies and the estimation of Fish Passage Efficiency FPE for juvenile salmon at the Bonneville Project. The goals of this study were to a provide biological information necessary to facilitate the design and placement of a surface-collector prototype and b make progress toward the estimation of FPE for the entire project. Objectives were as follows a Use mobile hydroacoustics to measure the vertical and horizontal distribution of salmon smolts in forebay areas of both powerhouses and to characterize the day and night variation in distributions in spring and summer. b Estimate smolt passage into two turbines and into the center sluice gate above each turbine, as well as the FPE ratio for paired sluicewayturbine openings under two test conditions blocked versus unblocked trash racks and open versus closed sluice gates in spring and summer at Powerhouse 1. c Evaluate smolt swimming direction in the area immediately upstream of two test units at Powerhouse 1, particularly at the zone of separation between flows entering turbines and flows entering sluice gates. d Estimate guided and unguided smolt passage into eight turbine intakes of Powerhouse 2 and identify effects of an open or closed sluice chute on the fish guidance efficiency of adjacent turbine units. The enclosed Summary presents highlights of study results, discussions, and conclusions.

Subject Categories:

  • Biology
  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE