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ID: 2564
[1.07 MB] Abel etal (2021) TRRP Winter Flow White Paper.pdf
Abel, C., K. de Juilio, K. Lindke, S. Naman, and J. Alvarez. 2021. Shifting a portion of Trinity River spring releases from Lewiston Dam to the winter period: a flow management action to benefit juvenile salmonid habitat availability, growth, and outmigrant timing. White-paper for the Trinity River Restoration Program (TRRP). TRRP, Weaverville, California. Available: https://www.trrp.net/library/document?id=2564.
"TRRP proposes to shift a portion of ROD flows to the winter period as an initial step towards natural flow variability in the regulated river system. Intended benefits of this action to the growth and survivability of juvenile salmon include inundating floodplains and other productive off-channel rearing habitats prior to fry emergence, reducing the effects of temperature suppression caused by high magnitude dam releases in late spring and early summer, creating seasonally appropriate disturbance of macroinvertebrate prey species to promote primary production and drift foraging opportunities, and providing thermal cues that encourage smolts to outmigrate prior to deterioration of environmental conditions in the lower Klamath River by allowing the river to warm earlier. Intended geomorphic benefits of this action include timing restoration releases when tributary events are likewise delivering flow and sediment to the mainstem and increasing bedload transport in reaches below Douglas City where the greatest habitat gains could be made through high-magnitude flow events. Under the Proposed Action, USBR would shift a portion of the ROD water for release during the winter to two distinct periods termed the Flow Synchronization Period and the Elevated Baseflow Period"
First Posted: 2022-07-27 23:32:23
Post Updated: 2022-07-27 23:34:21