January 29, 2021

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Geosyntec Practitioners to Complete Stormwater Harvesting Demonstration Project at Orange County Public Works

Mike Hardin, Ph.D., P.E., Mark Ellard, P.E., DFM, D.WRE, ENV SP, Nick Hartshorn, P.E., Dan Wen, Ph.D., and Yunjie Zhang (Florida) have completed their stormwater harvesting demonstration project at the Orange County Public Works facility in Florida.

Mike Hardin is a Senior Water Resources Engineer based in Orlando, FL with more than 15 years of experience specializing in evaluating the effectiveness of stormwater best management practices (BMP) for water quality performance. He also specializes in performing watershed assessments, hydrologic and hydraulic modeling, stormwater quality enhancement designs, stormwater sampling (grab and flow-weighted sampling), optimization of non-structural BMPs for water quality improvement, GIS data analysis, evaluating BMP practices, and water quality modeling.

Mark Ellard is a Senior Principal Water Resources and Civil Engineer based in Florida with more than 30 years of experience in diverse watershed management, water quality assessment, and stormwater design projects. He is in charge of Geosyntec’s Orlando office and leads the firm’s water and natural resources efforts in Florida.

Nick Hartshorn is a Water Resources Engineer who participated in multiple projects ranging from large-scale watershed studies to a city-wide analysis of street sweeping and pollution control device programs. He has performed a variety of work, including field investigations and sampling, computer-based modeling, construction observations and oversight, and technical report writing.

Dan Wen is a Senior Professional with experience in performing watershed assessments, hydrologic and hydraulic modeling, stormwater quality enhancement designs, stormwater sampling (grab and flow-weighted sampling), optimization of non-structural BMPs for water quality improvement, GIS data analysis, evaluating BMP practices, and water quality modeling.

Yunjie Zhang is a Staff Engineer at Geosyntec with experience in a variety of stormwater and water quality projects such as development of hydraulic and hydrologic models for urban watersheds, conceptual design of BMPs, and evaluation of water quality benefits of BMPs by modeling pollutant removal.

Orange County Public Works has a mission to protect and enrich Orange County communities through sustainable delivery of projects and services. The organization provides world class projects and services through collaboration, innovation, and stewardship.

As part of a Geosyntec initiative, an underground stormwater harvesting and exfiltration system (Pipe-R Reservoir System) was installed at Orange County Public Works. Stormwater runoff was collected from a nearby building roof and stored in an underground reservoir to use in the County’s spray trucks instead of potable water. A real-time, cloud-based intelligent setup (Opti) was used to actively monitor and manage the system for approximately 12 months. After approximately a year of monitoring, the team realized positive results. The system was able to prevent nearly all stormwater runoff (150,000 gallons) from leaving the site, significantly increase groundwater recharge (130,000 gallons), and off-set potable water usage for the County (7,000 gallons). The team collected water quality samples from three locations within the system, and the overall water quality was good and of acceptable quality to be used for the intended harvesting application.

More Information

About Orange County Public Works:https://ocpublicworks.com/
Learn more about Mike: https://www.linkedin.com/in/mike-hardin-ph-d-p-e-1a86b314/
Learn more about Mark: https://www.geosyntec.com/people/mark-ellard
Learn more about Nick: https://www.linkedin.com/in/nick-hartshorn-pe-9331708b/
Learn more about Dan: https://www.linkedin.com/in/dan-w-4820a712a/
Learn more about Yunjie: https://www.linkedin.com/in/yunjie-zhang/