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 on the Flow Ecology Special Study. See below for Stakeholder Advisory Group meeting information, documents, and action items.

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.