Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control...
Transcript of Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control...
![Page 1: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/1.jpg)
www.sonomacountywater.org
Upper Petaluma River Watershed Flood Control Project
Christy Kennedy Tim Harrison
![Page 2: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/2.jpg)
Meeting Agenda
A. Greetings and Introduction B. Overview of the Scoping Study C. Issues and Needs within the Upper
Petaluma River Watershed D. Review of Draft Objectives E. Potential Project Concepts F. Small Group Break-Out Session G. Next Steps
![Page 3: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/3.jpg)
Core Project Objectives
• Flood hazard reduction – Improve management of stormwater that
contributes, directly or indirectly, to reduced flood hazards.
• Groundwater recharge – Increase beneficial recharge of groundwater,
whether or not that recharged groundwater is directly accessible as water supply.
![Page 4: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/4.jpg)
Project Schedule
Stakeholder input
May 2011
Aug 2011
Oct 2011
Sep 2011
![Page 5: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/5.jpg)
Windsor
Santa Rosa
Rohnert Park Cotati
Petaluma
Sonoma
Sebastopol
Scoping Study – Three Watersheds
Zone 2A
![Page 6: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/6.jpg)
Zone 2A Watershed Overview
• 87 square miles • 12 major tributaries • Includes incorporated City of Petaluma
and rural community of Penngrove • Localized climatic conditions (20 inches
of rain at the mouth of the River to 50 inches of rain along the northeastern boundary)
![Page 7: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/7.jpg)
Key Project Purpose
• Develop a stormwater management/groundwater recharge project(s) that will provide regional flood hazard reduction and groundwater benefits within the Upper Petaluma River Watershed.
Flood Hazard Reduction
Groundwater Recharge
Projects considered as part of the Scoping Study
![Page 8: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/8.jpg)
Planned Process – Phases of Work
Feasibility
Gaps Analysis
Alternatives Analysis
Design/ Construction
Predesign/ Permitting
Implementation
Funding
Visioning, Develop
Objectives
Concept Development
Scoping
Stakeholder Involvement
![Page 9: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/9.jpg)
Issues Assessment
Overarching Issues – Similar to Other Watersheds – Objectives Definition/Prioritization – Watershed Understanding – Stakeholder Coordination – Project Integration – Regulatory Constraints – Funding Identification – Effective Communication
![Page 10: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/10.jpg)
Watershed Issues - Flooding
![Page 11: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/11.jpg)
Marin and Wiggins Creek Watershed
• 11.2 square miles • Elevation range 558 ft – 28 ft • Average rainfall 25-30 inches • Upper portions steep, lower portions flat
(meandering channels, lower velocity, siltation, vegetation overgrowth)
![Page 12: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/12.jpg)
Marin Creek
![Page 13: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/13.jpg)
Wilson Creek
![Page 14: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/14.jpg)
Watershed Issues - Flooding
![Page 15: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/15.jpg)
Downtown Penngrove Flooding
![Page 16: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/16.jpg)
Erosion along Lichau Creek
![Page 17: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/17.jpg)
Watershed Issues - Flooding
![Page 18: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/18.jpg)
Denman Reach Terracing Project
![Page 19: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/19.jpg)
Detention Basin at Lichau Creek
![Page 20: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/20.jpg)
Petaluma Valley Groundwater Basin
• Petaluma Valley Basin – 46,000 acres • Stratigraphy - faulted, discontinuous • Well capacities relatively low • Water quality inadequate is some areas
for potable standards – High TDS – Iron, managenese – Nitrates
![Page 21: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/21.jpg)
Groundwater Supply
• % of total supply from groundwater for City, 0-9%
• Estimated annual groundwater limit for City is 2000-3000 AF (past production ranges from 0-1,400 AFY)
• Pumping varies, but steadily increased from 2006
Reference: Petaluma 2005 UWMP
![Page 22: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/22.jpg)
Increasing Use of Groundwater
0
200
400
600
800
1000
1200
1400
1600
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
City’s Historical Groundwater Pumping (1970-2009)
Acr
e-Fe
et
![Page 23: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/23.jpg)
Groundwater Quality Issues
• Northwestern area – nitrates – Top 50 feet extending from surface affected* – Proposed projects should avoid mobilization
• Southeastern area – salinity – Seawater intrusion – Connate water from Sonoma Volcanics
* DWR Bulletin 118-4, 1982
![Page 24: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/24.jpg)
Surface Water Quality Issues
• Diazinon (a pesticide) • Nutrients • Pathogens • Sediment • Trash • Nickel
![Page 25: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/25.jpg)
Meeting Agenda
A. Greetings and Introduction B. Overview of the Scoping Study C. Issues and Needs within the Upper
Petaluma River Watershed D. Review of Draft Objectives E. Potential Project Concepts F. Small Group Break-Out Session G. Next Steps
![Page 26: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/26.jpg)
Draft Core & Supporting Objectives
Flood Hazard Reduction Groundwater Recharge
Water Quality
Water Supply
System Sustain-ability
Ecosystem Agricult-ural Land
Open Space
Comm-unity
Benefits
![Page 27: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/27.jpg)
Draft Core Objectives
Core Objectives Definition and Components
Flood Hazard Reduction Improve management of stormwater that contributes, directly or indirectly, to reduce flood hazards.
A. Manage up to a 100-year storm event B. Coordinate projects within and downstream
of project area C. Consider “green” methods
Groundwater Recharge Increase beneficial recharge of groundwater, whether or not that recharged groundwater is directly accessible as water supply.
A. Provide recharge B. Provide water supply offset from floods
![Page 28: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/28.jpg)
Draft Supporting Objectives Supporting Objectives Definition and Components
Water Quality Protect or improve water quality of surface water and groundwater.
A. Help eliminate impaired water body designations
B. Provide adequate water quality to sustain aquatic life
C. Facilitate long-term operations & maintenance permitting
D. Avoid aquifer degradation E. Improve aquifer water quality
Water Supply Increase or improve water supply availability, reliability and flexibility for domestic, municipal, industrial, agricultural and environmental use.
A. Offset use of groundwater and potable surface water by utilizing storm flows
![Page 29: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/29.jpg)
Draft Supporting Objectives
Supporting Objectives Definition and Components
System Sustainability Support energy and water efficiency and climatic change resiliency of water management systems and developed supplies; provide for channel stability and sedimentation control; and consider the long-term viability of implemented project and impact on affected systems.
A. Minimize use of imported energy at the project site
B. Ensure water is used efficiently C. Implement improvements to mitigate effects
of erosion and sedimentation D. Implement improvements that facilitate
permitting for long-term O&M
![Page 30: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/30.jpg)
Draft Supporting Objectives
Supporting Objectives Definition and Components
Ecosystem Improve ecosystem function and/or enhance habitat, especially for listed species
A. Integrate environmental habitat requirements into project
B. Promote sustainable, native habitats where possible
C. Preserve and enhance stream buffers and riparian areas
D. Facilitate long-term O&M permitting
Agricultural Land Preserve agricultural land use A. Minimize use of agricultural lands B. Preserve and enhance agricultural lands
![Page 31: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/31.jpg)
Draft Supporting Objectives
Supporting Objectives Definition and Components
Open Space Preserve and/or enhance open space. A. Minimize use of open space lands B. Preserve and enhance open space lands C. Restore degraded open space lands
Community Benefits Create and/or enhance recreation, public access, education, etc.
A. Provide educational opportunities B. Cooperate with local agencies to implement
recreational features C. Protect or enhance visual resources
![Page 32: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/32.jpg)
Draft Core & Supporting Objectives
Flood Hazard Reduction Groundwater Recharge
Water Quality
Water Supply
System Sustain-ability
Ecosystem Agricult-ural Land
Open Space
Comm-unity
Benefits
![Page 33: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/33.jpg)
Meeting Agenda
A. Greetings and Introduction B. Overview of the Scoping Study C. Issues and Needs within the Upper
Petaluma River Watershed D. Review of Draft Objectives E. Potential Project Concepts F. Small Group Break-Out Session G. Next Steps
![Page 34: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/34.jpg)
Project Concepts- Multi-Benefit Approach
![Page 35: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/35.jpg)
Stormwater Detention and Recharge Basin (In-Channel)
![Page 36: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/36.jpg)
Off-Stream Detention Basin
Malibu Legacy Park – Recessed Detention Basin
![Page 37: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/37.jpg)
Off-Stream Detention Basin
Malibu Legacy Park – Recessed Detention Basin
![Page 38: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/38.jpg)
Underground Detention & Recharge Basin
Downey Discovery Sports Park - Detention with Infiltration
![Page 39: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/39.jpg)
Managed Natural Floodplain
![Page 40: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/40.jpg)
Small-Group Break Out Session
• 15 minutes • Discuss relative importance of supporting
project objectives • Provide input on project concepts
• Designate one person per table to report back to group
![Page 41: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/41.jpg)
Project Schedule/Next Steps
Stakeholder input
May 2011
Aug 2011
Oct 2011
Sep 2011
![Page 42: Upper Petaluma River Watershed Flood Control ProjectUpper Petaluma River Watershed Flood Control Project Christy Kennedy Tim Harrison RMC . ... – Improve management of stormwater](https://reader034.fdocuments.net/reader034/viewer/2022050404/5f819b7332430d5caf4e2a45/html5/thumbnails/42.jpg)
Upper Petaluma River Watershed Flood Control Project
Christy Kennedy Tim Harrison