Flow Ecology Special Study

OC Public Works, on behalf of the municipalities of South Orange County Watershed Management Area (South OC WMA), is initiating the Flow Ecology Special Study as identified in the Water Quality Improvement Plan (WQIP).

The South OC WMA committed to implementing a comprehensive WQIP in association with the regional stormwater discharge permit, which identifies goals, strategies, and schedules to address altered flow patterns as a key concern for water quality and stream health in south Orange County creeks and rivers. The identification and elimination of nuisance dry weather flows and restoration of 23,000 linear feet of degraded stream habitat are key implementation strategies to achieve the goals of the WQIP.

Determining environmental flow needs will shed light on how to manage water to promote streamflow enhancement and environmental restoration while balancing the needs of the communities of South Orange County. The primary goal of the Flow Ecology Study is to develop ecologically-based environmental flow recommendations for waterbodies across the South OC WMA.

Project Leads:

More information about the development and implementation of the Flow Ecology Special Study can be found below:

How to participate/contribute

 
Request more information or ask questions on the Flow Ecology Special Study. See below for Stakeholder and Technical Advisory Group meeting information, documents, and action items.

 

June 16, 2020: Webinar Workshop

 
A webinar for the Stakeholder Advisory Group (SAG) and the Technical Advisory Group (TAG) was held on Tuesday, June 16, 2020. The study team presented the hydrologic assessment results and introduced the proposed flow ecology evaluation approach, which included a discussion on habitats and focal species to model.  
 
When: June 16, 2020, from 9:00 am - 12:00 pm
Where: Online 
 
Meeting Files (accessible through the South OC WQIP Regional Clearinghouse)

  • Full recording of the workshop
  • Agenda
  • Presentation
  • Fact sheet describing functional flow metrics
  • Publication on "Tools for managing hydrologic alteration on a regional scale: Setting targets to protect stream health", as requested during the workshop
  • SAG/TAG Participant list

June 3, 2020: Technical Advisory Group Webinar Workshop

 
A webinar for the TAG was held on Wednesday, June 3, 2020. The workshop focused on the recently developed hydrologic model, its calibration, and its output.
 
When: June 3, 2020, from 9:00 - 10:30 am
Where: Online 
 
Meeting Files (accessible through the South OC WQIP Regional Clearinghouse)

  • Full recording of the workshop
  • Agenda
  • Presentation
  • Response to TAG comments matrix
  • TAG Participant list

January 8, 2020: In-Person Workshop

An in-person workshop was held on January 8, 2020. It was a joint meeting of the SAG and the TAG to help increase efficiency of the communication process and reduce the total number of meetings some individuals would have to attend. This workshop provided the SAG and TAG with an update on the study progress and addressed action items identified in previous meetings.
 
When: January 8, 2020 from 1:00 pm - 3:30 pm
Where: Southern California Coastal Water Research Project (SCCWRP), 3535 Harbor Blvd # 110 Costa Mesa, CA 92626
 
Meeting Documents (accessible through the South OC WQIP Regional Clearinghouse)

  • Agenda
  • Presentation
  • Sign in Sheet
  • Meeting Notes
  • Articles including additional information about CSCI and ASCI

  
Action Items

  • Upload more information regarding CSCI and ASCI (see link above)
  • Schedule meetings and detailed technical webinars regarding hydrology and biology, as needed
  • Use the "Request more information" button above to contact the study technical team as needed

 

2019

October 22, 2019: Technical Advisory Group Workshop

 
An in-person meeting was held on October 22, 2019 to discuss technical processes within the study and opportunities for TAG input. See below for details, meeting documents, and action items
 
When: October 22, 2019 from 9:30 am - 2:30 pm
Where: Southern California Coastal Water Research Project (SCCWRP), 3535 Harbor Blvd # 110 Costa Mesa, CA 92626 
 
Meeting Documents (accessible through the South OC WQIP Regional Clearinghouse)

  • Agenda
  • Presentation
  • Meeting Notes
  • Biological and Habitat Data Sources
  • TAG Participant List

 
Action Items

  • Upload biological and habitat data sources (see link above)
  • Use the "Request more information" button above to contact the study technical team as needed

 

August 5, 2019: Stakeholder Advisory Group Workshop

An in-person meeting was held on August 5, 2019 to further discuss the study and opportunities for stakeholder input. See below for details, meeting documents, and action items.
 
When: August 5, 2019 from 1:30 - 3:30 pm
Where: OC Sailing and Events Center: Dana Cove Room, 34451 Ensenada Place, Dana Point, California 92629
 
Meeting Documents (accessible through the South OC WQIP Regional Clearinghouse)

  • Agenda
  • Presentation
  • Meeting handout
  • Sign in sheet
  • KMZ files of
    • modeled subbasins
    • modeled reaches and 
    • in-stream low flow diversions, not including coastal diversions or diversions within storm drains

Action Items
Use the "Request more information" button above to notify us of:

  • Key hydrologic and ecological data
  • Potential additional TAG participants
  • Additional questions or concerns

July 17, 2019: Stakeholder Advisory Group Webinar

An online webinar was held on July 17, 2019 to introduce the Flow Ecology Special Study. See below for details and for meeting documents, including a link to the recorded webinar.
 
When: July 17, 2019 from 1:30 - 3:30 pm
Where: Online
 
Meeting Documents (accessible through the South OC WQIP Regional Clearinghouse)

  • Presentation slides
  • Webinar recording (password: FlowEcologyJuly2019)

 
Action Items
Use the "Request more information" button above to notify us of questions or concerns and join us at the in person workshop on August 5, 2019.