Open Daily: 10am - 10pm | Alley door pickup 10am - 7pm 3038 Hennepin Ave Minneapolis, MN
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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Geomorphic Response of the Sandy River, Oregon, to Removal of Marmot Dam

Geomorphic Response of the Sandy River, Oregon, to Removal of Marmot Dam

U. S. Department of the Interior

Paperback

General Nature

ISBN10: 1496099257
ISBN13: 9781496099259
Publisher: Createspace
Published: Mar 4 2014
Pages: 74
Weight: 0.43
Height: 0.15 Width: 8.50 Depth: 11.02
Language: English
The October 2007 breaching of a temporary cofferdam constructed during removal of the 15-meter (m)-tall Marmot Dam on the Sandy River, Oregon, triggered a rapid sequence of fluvial responses as 730,000 cubic meters of sand and gravel filling the former reservoir became available to a high-gradient river. Using direct measurements of sediment transport, photogrammetry, airborne light detection and ranging (lidar) surveys, and, between transport events, repeat ground surveys of the reservoir reach and channel downstream, we monitored the erosion, transport, and deposition of this sediment in the hours, days, and months following breaching of the cofferdam.

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