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M&T/Llano Seco Fish Screen Short-term/Long-term Project. WORKSHOP #5, 9-3-08. A CALFED BAY-Delta Authority Funded Project. Sponsored by: Ducks Unlimited, Inc. MEI. M&T PROBLEM. Fish Screen Velocity and Intake Burial Solutions 1. Relax the fish screening criteria
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M&T/Llano Seco Fish Screen Short-term/Long-term Project
WORKSHOP #5, 9-3-08
A CALFED BAY-Delta Authority Funded Project
Sponsored by: Ducks Unlimited, Inc.
1. Relax the fish screening criteria
2. Evaluate a range of solutions that meet fish screen criteria (in-channel) or eliminate the need for fish screens(out-of-channel)
Eric Larsen UC Davis
Eric Larsen UC Davis
850 ft in 6 yrs (1995-2001): Rate = 140’/yr (Stillwater Sciences, 2001) – 60’/yr (Larsen/DWR) – 60-80’/yr (Corollo)
Recent rates reduced by dredging of gravel bar (2001, 2007): 300,000 t.
~ 400 ft in 10 yrs (1996-2006)
1. To obtain an authoritative and unbiased description of the state of scientific knowledge related to Sacramento River meander, fish screen and pumping plant technology by convening a multidisciplinary team of experts in the fields of fluvial geomorphology, sediment transport, hydraulic modeling, fish screen and pumping plant technology.
2. To provide an opportunity for stakeholders and scientists to test and refine an understanding of the potential for unintended effects between managing the natural riverine system, fisheries requirements and pumping requirements.
3. To conduct an exhaustive literature search, fill identified data gaps and conduct modeling to provide important data essential to answering specific questions that support a strong research approach in accomplishing the primary project goal.
4. To determine performance measures/indicators that will guide the long-term solution in meeting the primary project goal.
5. To fully document the investigative process of determining, identifying and justifying the long-term solution that will meet the primary goal of the project.
-Groundwater wells
-Ranney Collector
-City of Chico Wastewater
-Butte Creek Diversion
-Upstream & Big Chico Creek
-Upstream & across-stream
- Extended intakes
- In-conduit screens
- Infiltration galleries
- Multiple production wells
- Dredging & modified screens
- Spur dikes
- Ranney Collectors
2-D Modeling to evaluate upstream and downstream impacts of dikes and to evaluate effects of river meandering on the M&T overflow weir
MEI
M&T Weir
- ~ 2,200 ft
- ~ 3,500 ft
Sacramento River Bridge @ Butte City Br. No. 11-0017
Before Dikes 2004
