Yakima River Basin Phase II Fish Screen Evaluations, 2003

Vucelick, Jessica A. ; McMichael, Geoffrey A. ; Chamness, Mickie A.

Pacific Northwest National Laboratory (U.S.)

关键词: Bonneville Power Administration;    Sediments;    Juveniles;    Fish Screens;    Rivers;   

DOI  :  10.2172/860081
RP-ID  :  PNNL-14627
RP-ID  :  AC05-76RL01830
RP-ID  :  860081

美国|英语

来源: UNT Digital Library

【 摘 要 】

In 2003, the Pacific Northwest National Laboratory (PNNL) evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. PNNL collected data to determine whether velocities in front of the screens and in the bypasses met the Nation Oceanic and Atmospheric Administration Fisheries (NOAA Fisheries, formerly the National Marine Fisheries Service (NMFS)) criteria to promote safe and timely fish passage. In addition, PNNL conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2003, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by the National Oceanic and Atmospheric Administration Fisheries. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Conditions at some facilities indicate that operation and/or maintenance should be modified to improve juvenile fish passage conditions. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well greased and operative. (5) Removal of sediment buildup and accumulated leafy and woody debris could be improved at some sites.