Concurrent Sessions C: Multi-Dimensional Modeling and Fish

University of Massachusetts AmherstScholarWorks@UMass AmherstInternational Conference on Engineering andEcohydrology for Fish Passage

International Conference on Engineering andEcohydrology for Fish Passage 2013

Jun 25th, 3:50 PM - 4:10 PM

Concurrent Sessions C: Multi-DimensionalModeling and Fish Passage Restoration - Multi-Dimensional Hydraulic Modeling and PreliminaryMonitoring Results for the Mission Creek FloodControl ChannelJonathon MannHDR Engineering, Inc., Fisheries Design Center

Mike GarelloHDR Engineering, Inc., Fisheries Design Center

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Mann, Jonathon and Garello, Mike, "Concurrent Sessions C: Multi-Dimensional Modeling and Fish Passage Restoration - Multi-Dimensional Hydraulic Modeling and Preliminary Monitoring Results for the Mission Creek Flood Control Channel" (2013).International Conference on Engineering and Ecohydrology for Fish Passage. 64.https://scholarworks.umass.edu/fishpassage_conference/2013/June25/64

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Multi-Dimensional Hydraulic Modeling and Preliminary Monitoring Results for the Mission Creek Flood Control Channel in Santa Barbara, California

International Conference on Engineering and Ecohydrology for Fish Passage

Oregon State University at Corvallis June 25, 2013

Jonathon Mann, PE/ Michael Garello, PEHDR Fisheries Design Center

Acknowledgements

• City of Santa Barbara• Santa Barbara County Flood Control District• California Department of Fish and Wildlife• National Marine Fisheries Service• Northwest Hydraulic Consultants• HDR Engineering, Inc.

Presentation Overview/Objectives

• Background and project development • Hydraulic modeling and design• Construction• Preliminary monitoring• Next steps

Project Location

Watershed Perspective

Project Location

Introduction: Southern California Steelhead

• Southern California Evolutionarily Significant Unit [ESU] / Distinct Population Segment [DPS]

• Listed as Endangered by NMFS in 1997• Critical Habitat Designated in 2000/2004

Mission Creek Fish Passage Issues

• Droughts, floods, and wildfires have a significant impact on resident trout populations

• 81% of the available habitat occurs upstream of the flood control channels

• Multiple impediments to passage exist in addition to the flood control channels

• Flood control channels limit passage due to high velocities and low depths for typical Mission Creek flows

• Development, stormwater return, and low flows all contribute to water quality concerns during the potential migration period

Mission Creek Pre-Construction Conditions

Mission Creek Pre-Construction Conditions

• Channel Encroachment as Part of US 101 Widening Project

• Realigned • Hard Channel Lining• Flood Conveyance of 3,400 cfs Through

Downtown Santa Barbara

Caltrans Channels

MISSION CREEK FISH PASSAGE – AFS 2011

Caltrans Channels


Caltrans Channels


Caltrans Channels


Caltrans Channels


Caltrans Channels


Mission Creek Project Objectives

• Improve fish passage (fisheries)

• Maintain Flood Conveyance (County)

• Limit Additional Maintenance Effort (City)

Mission Creek Background Studies and Alternative Development

• Penfield and Smith (P&S) / USACE – 1997 to 2005

• P&S develop three channel modification alternatives

• USACE initiate a Section 206 project aimed at Mission Creek Fish

Passage issues.- 2002

• USACE publish report on hydraulic condition of Mission Creek natural

and non-natural channel reaches - 2004

• 2006 - Pacific Hydraulic Engineers and Scientists (PHES) develop five

potential channel modification alternatives

• 2008 - City of SB / Northwest Hydraulic Consultants (NHC) perform

physical hydraulic modeling of two channel modification alternatives

• 2010 - City of SB / HDR perform a performance evaluation of the

recommended alternative

PHES 2006

FIVE CHANNEL MODIFICATION ALTERNATIVES


NHC 2008

PHYSICAL MODELING OF TWO SELECTED ALTERNATIVES


Selected Alternative from NHC Modeling


Mission Creek Specific Design Criteria

• 100 to 150 cfs maximum and 10 cfs minimum fish passage design flow.

• Maximum jump height of 1 ft• Minimum depth of 1 ft• Free draining – no standing water which may

lead to vector control issues.• No impact to currently observed water

surface elevation/flood capacity at a channel design flow of 3,400 cfs.

• Minimize maintenance and bedload removal to the extent possible.

• Maintain 12-ft travel lane for maintenance vehicles.

Mission Creek Recommended Fish Passage Alternative

• Saw cut floor of existing channel floor

• Construct Cast-In place concrete fish channel

• Fish resting pockets every 40-ft

• Install sills to maintain minimum hydraulic depth

Mission Creek Fish Passage Alternatives Performance Evaluation

1D, 2D, and 3D CFDhydrodynamic computer

modeling used to evaluate hydraulic performance

Fish routing model based on USGS 15-minute flow data,

anticipated fish condition, and literature based swimming

performance to evaluate fish passage effectiveness

2-Dimensional modeling of recommended alternative

VELOCITY STREAMLINES AT 25 CFS (LEFT) AND 50 CFS (RIGHT)


2-Dimensional modeling of recommended alternative

CHANNEL SHEAR STRESS EXCLUSION PLOT FOR 200 AND 300 CFS


3-Dimensional modeling of recommended alternative.

VELOCITY STREAMLINE PLOTS FOR A FLOW OF 100 CFS AT VARIOUS WATER COLUMN DEPTHS


Mission Creek Design Results

• Depth of fish channel to range from 3.0 to 3.5 ft.

• Transition structures at the inlet and outlet of the fish passage channel

• Semi-removable concrete sills with full slot and removable weir plate.



Mission Creek Construction



Mission Creek Post Construction Monitoring


• Phase I (upstream) is a prototype for Phase II (downstream) which is expected to go to construction in the summer of 2013

• Storm event based monitoring program conducted by CDFG, City of SB, and NHC

• Observation and Photodocumentation

• Measurement of low flow events occur using top-setting rod and velocity meter

• Measurement of high flow events occur using system of overhead cables and velocity meter mounted to deployable carriage assembly and sounding weight

• Winter/Spring 2012 provided only four opportunities to monitor hydraulic parameters with flows less than 50 cfs




• Velocities generally below 6 fps • Highest velocities were recorded on the

downstream side of the sills (Station 2 at Sites A and B), where velocities along the side of the channel locally reached 7 fps

• Resting pockets were successful at maintaining reduced velocities compared to the main channel

• Measured velocities in resting pockets ranged between 1.2 and -1.0 fps while velocities in the adjacent main channel exceeded 4 fps

• Preliminary rating curves for stage-discharge relationships show inset channel full at somewhere between 25 and 50 cfs

2-Dimensional modeling



Need Flow!



2-Dimensional modeling



Stay Tuned

• Phase 2 construction underway• More monitoring of higher flows

(hopefully)

Photo by COMB

Documents

Concurrent Sessions C: Multi-Dimensional Modeling and Fish