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Book Hydroacoustic Evaluation of Downstream Migrating Juvenile Salmon and Steelhead at Rock Island Dam Powerhouse No 1 in Spring 1987

Download or read book Hydroacoustic Evaluation of Downstream Migrating Juvenile Salmon and Steelhead at Rock Island Dam Powerhouse No 1 in Spring 1987 written by Tracey W. Steig and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Salmon Escapements Above Rock Island Dam 1954 60

Download or read book Salmon Escapements Above Rock Island Dam 1954 60 written by Robert R. French and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hydroacoustic Assessment of Downstream Migrating Salmonids at the Dalles Dam in Spring and Summer 1985 Final Report

Download or read book Hydroacoustic Assessment of Downstream Migrating Salmonids at the Dalles Dam in Spring and Summer 1985 Final Report written by and published by . This book was released on 1986 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hydroacoustic study of downstream migrating salmon and steelhead was conducted at The Dalles Dam. The primary objective was to estimate the effectiveness of the spillway and sluiceway in passing downstream migrants. The secondary goals were to provide information on the horizontal, vertical, and temporal distributions of downstream migrants. June 1, and the summer season was from July 1 to August 15, 1985. Nineteen transducers were deployed to monitor turbine, spillway, and sluiceway locations. The 10 h instantaneous spill effectiveness results showed that spill passed fish more efficiently during the summer study than during the spring study. During the period May 1-31 when the turbines, spillway, and sluiceway were all operating consistently, the sluiceway was found to be the most efficient method of passing fish on a percent flow basis. During the summer study, after the termination of spill, the sluiceway and turbines passed almost equal percentages of fish. The run timing during the spring showed steadily increasing numbers of fish until the peak of the run on May 16. Another, smaller peak occurred on May 20. Thereafter, passage gradually decreased through the end of the spring study. The spring run consisted of yearling chinook, steelhead and sockeye juvenile salmonids. During the summer study, fish passage gradually decreased, except for minor peaks near the beginning of the study. The summer migration consisted primarily of subyearling chinook juvenile salmonids.

Book Annual Fish Passage Report

Download or read book Annual Fish Passage Report written by Paul D. Zimmer and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Important runs of salmon and steelhead pass Rock Island Dam on the Columbia River. Annual records of fish movement past the dam are available from 1933. Count of 23,352 chinook salmon in 1959 was less than half the peak year of 1957. Sockeye count of 72,351 exceeded the 26-year mean of 52,073. Only 118 coho salmon were recorded. Greatest count of coho, 229, occurred in 1947. Numbers of steelhead passing Rock Island Dam increased in 1959. The 26-year mean of 2,900 steelhead was less than 1959 count of 4,138.

Book Hydroacoustic Monitoring of Downstream Migrant Salmon and Steelhead at Wells Dam in Spring 1984

Download or read book Hydroacoustic Monitoring of Downstream Migrant Salmon and Steelhead at Wells Dam in Spring 1984 written by and published by . This book was released on 1984 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The downstream migration of salmon and steelhead in spring 1984 at Wells Dam on the mid-Columbia River was monitored using hydroacoustics. The primary objective of this research was to document run timing and describe the distribution of smolts at the dam. The study occurred from April 2 to June 15, 1984. Four transducers were deployed at the bases of pier noses at Turbines 3, 5, 7, and 9 and aimed up 24° into the forebay. They were sampled once every hour, 24 hours per day, for 75 days. An index of fish passage was reported daily to the Water Budget Center in Portland, Oregon. This index was computed as follows. For each 24-h period, separate fish passage rates (number/time) at each of the four sampling locations were estimated by dividing the sum of the ''weighted'' fish detections by total sample time. These four values then were averaged to produced the daily index (number/day/location). The first substantial increase in fish passage occurred on April 25, 1984 due to the chinook released from the Winthrop hatchery on April 23. During May, run timing was fairly uniform except for peaks on May 2, 14, 18, and 22. The unexpected peak in run size that occurred from May 29 to June 2 could have been caused by juvenile mountain whitefish. Although the proportion of each species varied, chinook passage probably peaked in late April, and steelhead in the first two weeks of May; sockeye passage was variable throughout the study. The data indicated that most downstream migrants were distributed high in the water column and toward the western end of the dam. Average hourly passage rates for day and night were similar, but more fish passed the dam during the longer period of daylight than the shorter period of darkness. 7 refs., 13 figs.

Book Hydroacoustic Evaluation of Elevated Flow for Passing Downstream Migrating Juvenile Salmon and Steelhead at Foster Dam Oregon 16 21 1984

Download or read book Hydroacoustic Evaluation of Elevated Flow for Passing Downstream Migrating Juvenile Salmon and Steelhead at Foster Dam Oregon 16 21 1984 written by Oregon. Department of Fish and Wildlife and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Oregon Dept. of Fish and Wildlife (ODFW) conducted flow experiments to optimize smolt passage through Foster Dam duing April and May 1984. ODFW used hydroacoustic techniques to monitor the smolts as they passed through the dam. Trends in passage were observed relative to diel period, flow, and location.

Book Hydroacoustic Evaluation of the Efficiencies of the Ice and Trash Sluiceway and Spillway at Ice Harbor Dam for Passing Downstream Migrating Juvenile Salmon and Steelhead 1983

Download or read book Hydroacoustic Evaluation of the Efficiencies of the Ice and Trash Sluiceway and Spillway at Ice Harbor Dam for Passing Downstream Migrating Juvenile Salmon and Steelhead 1983 written by Llew Johnson and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hydroacoustic Evaluation of Juvenile Salmon and Steelhead Approaching a Bar Screen Deflector at Powerhouse No 1 of Rock Island Dam in 1993

Download or read book Hydroacoustic Evaluation of Juvenile Salmon and Steelhead Approaching a Bar Screen Deflector at Powerhouse No 1 of Rock Island Dam in 1993 written by Tracey W. Steig and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: