Post on 29-Jan-2016
Marin County Watershed Stewardship ProgramMarin County Watershed Stewardship Program
Marin County Department of Public WorksMarin County Department of Public Works
Countywide Watershed Program
The watershed program provides a framework to integrate flood protection, creek and wetland restoration, fish passage and water quality improvements with public and private partners to protect and enhance Marin’s watersheds.
Why A Watershed Approach? Why now? We have momentum and support from our partners and
the County.
The issues identified by the community aren’t going away so this program allows us to be ready when the economy recovers and new funding programs come on line.
Supports and guides protection and enhancement of significant natural resources
Ensures alignment with State and Federal resource agency goals which should support timely project implementation
Leverages funding to attract State and Federal sources
Dedicates staff to search for and pursue funding
Policy Advisory Committee: •BOS FC District Rep•City Council Reps•Flood Zone Advisory Board Reps•Water and Sanitary Board Reps
Technical Working Group:•Municipal Directors •Local, State & Federal Agency Reps •Watershed Groups •Homeowner’s Association Reps
Operations and Finance Committee: •City Managers & County DPW Director
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Board of SupervisorsFlood Control and Water Conservation District
Objectives Provide an increased level of flood protection Reduce on-going maintenance costs and impacts Develop projects that provide multiple benefits i.e
restoration and flood protection Ability to permit as a self-mitigating project Respond to sea level rise Opportunities to improve ecological benefits Ability to meet multiple partner agency objectives
Next Steps
Continued improvements to the website
Watershed-level planning Habitat Assessments Hydrology and Hydraulics studies Watershed Master Plans
Continued review of grants and other funding opportunities
Habitat Assessment
2009 Fish and Game creek assessments Goal is to translate their data into an
informative and accessible manner Spatial or GIS analysis is the tool
• Fish passage barriers• Pipelines and other infrastructure• Storm drain system• Restoration opportunities• Habitat features• Flow history and stream persistence• Other relevant information
Hydrology and Hydraulics Collecting field data including topography, rainfall, stream
flow, and sediment transport
Using the field data, a model is developed to show: How water moves in the creek Water depth outside the creek
How will the model be used? Representation of past and predicted storms Depict the footprint and elevation of flood waters Show the benefit of any proposed alternative Can be altered to include new information in the future
Hydrologic model development
Model is a predictive tool to test the effectiveness of various flood control measures
0
1,000
2,000
3,000
4,000
5,000
6,000
12/30/050:00
12/30/056:00
12/30/0512:00
12/30/0518:00
12/31/050:00
12/31/056:00
12/31/0512:00
12/31/0518:00
1/1/060:00
1/1/066:00
Dis
char
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at M
adro
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St.
Bri
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e (c
fs)
Total discharge
Out-of-channel discharge
In-channel discharge
1700 cfs
5,400 cfs
H & H Study outcomes
Understanding of the flood benefit and estimated cost for all proposed projects.Clear understanding of the current flood
impacts for a series of storm eventsModel will be a tool that quantifies the flood
impactShows the extent and depth of flooding
before and after for a given alternative or a suite of alternatives
Can be adapted for future conditions
For more information contact:Liz Lewis, Principal Planner 499-7226
Chris Choo, Senior Planner499-7586
www.marinwatersheds.org