Evaluating Potential Methods to Quantify Stormwater Capture

Date / Time:
Tuesday, Sep 15 2:35pm to 3:05pm
Track / Session:
Track: Data Management, GIS / GIS Tools, and Modeling / Session 3

In response to one of the worst droughts in California’s modern history, the State Water
Resources Control Board (State Water Board) recognized the importance of developing new and underutilized water supplies, including stormwater capture and use. As municipalities initiate new stormwater infrastructure planning that emphasizes the implementation of projects that capture, treat, infiltrate, or reuse stormwater as a resource, there is a need for improved tracking of statewide capture and use of stormwater volumes. The State Water Board tasked staff with estimating the total volume of captured stormwater, a fundamentally challenging task in a state as diverse as California. State Water Board developed a contract with the Southern California Coastal Water Research Project (SCCWRP) to provide the State Water Board with a technical resource that identified and evaluated various technical methods for quantifying the potential volume of stormwater capture throughout California.

The six separate methods that were identified and could be used to quantify stormwater capture for different components of water resources infrastructure are:
• Stormwater best management practice (BMP) flow monitoring,
• BMP design information from plan submittals,
• Watershed models,
• Large-scale impoundments,
• Measured changes in groundwater levels, and
• Measured changes in Publicly Owned Treatment Works (POTWs) influent flow.

This presentation will go through the technical approach as well as the advantages and disadvantages of the six researched methodologies. The discussion will also review the tools and methodologies currently used in the stormwater arena. This presentation will promote discussion on what data management and visualization tools, data collection tracking, and advances in watershed planning are being used as well as the future of stormwater volume methodologies for California.

Primary Speaker:
Sahand Rastegarpour, State Water Resources Control Board
Sahand Rastegarpour is a Water Resource Control Engineer in the STORMS (Strategy to Optimize Resource Management of Stormwater) Program in the State Water Board. He is responsible for developing and implementing projects associated with statewide stormwater planning for the Water Boards. His projects with STORMS involve monitoring data sources to enhance the quality of data and coordinating with internal and external partners on the identification, collection, analysis, and management of stormwater management data. He received his B.S. in Civil Engineering from Sacramento State University in 2015 and joined the State Water Board in 2016.
Supporting Speaker 1:
Kenneth Schiff, Southern California Coastal Water Research Project
Kenneth Schiff is SCCWRP's Deputy Director and is responsible for helping manage day-to-day operations, supervising and mentoring senior level staff, and developing the long-term vision of the research agency. The outcome of his research has been widely used in environmental management actions including remediation prioritization and implementation, assessment tool development, testing new technology, and regulatory responses such as NPDES permit conditions, developing TMDLs, and setting water quality standards. He received his B.S. in biology from San Diego State University in 1984 and his M.S. in biology from California State University, Long Beach in 1988. He joined SCCWRP in August 1995.
Supporting Speaker 2:
Elizabeth Fassman-Beck, Southern California Coastal Water Research Project
Dr. Elizabeth Fassman-Beck is a SCCWRP Principal Engineer whose primary responsibility is to implement SCWWRP’s Stormwater BMPs (best management practices) research theme. Her research in urban stormwater management quantifies the hydrologic and water quality performance of BMPs, with an emphasis on green infrastructure (GI)/Low Impact Development (LID) technologies such as living (green) roofs, bioretention systems (rain gardens and planters), permeable pavements, swales, and floating treatment wetlands. She received her Ph.D. and M.S. in civil engineering from the University of Virginia and her B.S. in civil and environmental engineering from Duke University. She joined SCCWRP in 2019.