The Hydrodynamic Efficiency of Non-Traditional Levee Protection Methods in the Sacramento River Delta

Author(s):  
Douglas Sherman ◽  
Jean Ellis ◽  
Jeffrey Hart ◽  
David Hansen
2007 ◽  
Author(s):  
Martin Miele ◽  
Jeremy Flemmer ◽  
Charles Nycum ◽  
Sally Lamb ◽  
Sandra A. Takata

1980 ◽  
Vol 59 (3) ◽  
pp. 222-239
Author(s):  
Janet Lokke ◽  
Steve Simmons

2017 ◽  
Vol 68 (5) ◽  
pp. 878 ◽  
Author(s):  
Jason G. Romine ◽  
Russell W. Perry ◽  
Adam C. Pope ◽  
Paul Stumpner ◽  
Theresa L. Liedtke ◽  
...  

Survival of out-migrating juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Sacramento–San Joaquin River delta, California, USA, varies by migration route. Survival of salmonids that enter the interior and southern Delta can be as low as half that of salmonids that remain in the main-stem Sacramento River. Reducing entrainment into the higher-mortality routes, such as Georgiana Slough, should increase overall survival. In spring 2014, a floating fish-guidance structure (FFGS) designed to reduce entrainment into Georgiana Slough was deployed just upstream of the Georgiana Slough divergence. We used acoustic telemetry to evaluate the effect of the FFGS on Chinook entrainment to Georgiana Slough. At intermediate discharge (200–400m3 s–1), entrainment into Georgiana Slough was five percentage points lower when the FFGS was in the on state (19.1% on; 23.9% off). At higher discharge (>400m3 s–1), entrainment was higher when the FFGS was in the on state (19.3% on; 9.7% off), and at lower discharge (0–200m3 s–1) entrainment was lower when the FFGS was in the on state (43.7% on; 47.3% off). We found that discharge, cross-stream fish position, time of day, and proportion of flow remaining in the Sacramento River contributed to the probability of being entrained to Georgiana Slough.


Author(s):  
Martin Miele ◽  
Jeremy Flemmer ◽  
Charles Nycum ◽  
Sally Lamb ◽  
Sandra A. Takata

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