Abstract Title

Session S-07F: Elwah River Restoration: Evolution of Habitats and Ecosystems During a Dam Removal Project

Keywords

Restoration

Start Date

1-5-2014 3:30 PM

End Date

1-5-2014 5:00 PM

Description

Located on the north Olympic Peninsula, the Elwha River nearshore is a critical component of the Salish Sea. It is depended on by no fewer than six federally listed salmon species, and numerous forage fish. The Elwha nearshore is impaired ecologically due to extensive shoreline armoring and in-river channelization and dams. The Elwha nearshore is undergoing an unprecedented restoration event with the removal of two large in river dams, which began in September 2011. As of September 2013 approximately 2.7 million cubic meters of sediment has been delivered to the sediment starved Elwha nearshore. The Coastal Watershed Institute and partners lead a long term study of the Elwha nearshore ecological function which began in 2005 and is based on a BACI design. In this presentation we provide an overview of pre-dam fish use of the Elwha and comparative nearshore areas, and first indications of ecological function response of the juvenile fish migration and forage fish spawning to dam removal. We also provide an overview of linkages of the nearshore restoration event for the larger Elwha and Salish Sea ecosystem.

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May 1st, 3:30 PM May 1st, 5:00 PM

Ecological Changes in the Elwha River nearshore: Fish use

Room 602-603

Located on the north Olympic Peninsula, the Elwha River nearshore is a critical component of the Salish Sea. It is depended on by no fewer than six federally listed salmon species, and numerous forage fish. The Elwha nearshore is impaired ecologically due to extensive shoreline armoring and in-river channelization and dams. The Elwha nearshore is undergoing an unprecedented restoration event with the removal of two large in river dams, which began in September 2011. As of September 2013 approximately 2.7 million cubic meters of sediment has been delivered to the sediment starved Elwha nearshore. The Coastal Watershed Institute and partners lead a long term study of the Elwha nearshore ecological function which began in 2005 and is based on a BACI design. In this presentation we provide an overview of pre-dam fish use of the Elwha and comparative nearshore areas, and first indications of ecological function response of the juvenile fish migration and forage fish spawning to dam removal. We also provide an overview of linkages of the nearshore restoration event for the larger Elwha and Salish Sea ecosystem.