Can I read Downstream Effects of the Pelton-Round Butte Hydroelectric Project on Bedload Transport, Channel Morphology, and Channel-Bed Texture, Lower Deschutes River, Oregon on EtoBox?

Downstream Effects of the Pelton-Round Butte Hydroelectric Project on Bedload Transport, Channel Morphology, and Channel-Bed Texture, Lower Deschutes River, Oregon by Heidi Fassnacht; Ellen M. Mcclure; Gordon E. Grant; Peter C. Klingeman is a Environmental Science article available to read on EtoBox.

What is Downstream Effects of the Pelton-Round Butte Hydroelectric Project on Bedload Transport, Channel Morphology, and Channel-Bed Texture, Lower Deschutes River, Oregon about?

Field, laboratory, and historical data provide the basis for interpreting the effects of the Pelton-Round Butte dam complex on the surface water hydrology and geomorphology of the lower Deschutes River, Oregon, USA. The river's response to upstream impoundment and flow regulation is evaluated in terms of changes in predicted bedload transport rates, channel morphology, and channel-bed texture. Using a hydraulic model, we predicted discharges between 270 and 460 m 3 /s would be required to initiate bedload transport. Analysis of morphologic change at a long-term cross-section showed general scour and fill beginning at approximately 250 m 3 /s. Such bed-mobilizing flows have occurred less than 1% of the time during the 70+-year period of record, substantially less frequently than on other alluvial rivers. Historical streamflow records and bedload transport modeling suggest dam operations have had only minimal effects on the frequency and magnitude of streamflow and bedload transport. Analysis of gage data collected just below the dam complex revealed slow, minor degradation of the channel over the entire period of record, indicating the dams have not noticeably accelerated long-term

Who reads Downstream Effects of the Pelton-Round Butte Hydroelectric Project on Bedload Transport, Channel Morphology, and Channel-Bed Texture, Lower Deschutes River, Oregon?

Author

Heidi Fassnacht; Ellen M. Mcclure; Gordon E. Grant; Peter C. Klingeman

Publisher

American Geophysical Union

Published

2013

Language

EN

Field

Environmental Science (Physical Sciences)