City of San Diego Case Study
Alta developed the MS4 Flow SystemTM to specifically help municipalities identify, assess, and eliminate non-stormwater flows in their storm drains. The web-enabled flow data system relies on ultra-sonic sensors, wireless data loggers, and a customizable web portal. As part of an on-going project, Alta has been deploying this flow data system throughout the City of San Diego’s MS4 network to collect accurate measurements of flow rates and trends. The near real-time data is sent to a customizable web portal, where it is organized and displayed to create a hub of data interaction, interpretation, and collaboration among those involved in the project.
During the 2016-2017 monitoring year, the MS4 Flow SystemTM was installed at over ten different locations and project staff were provided access to near real-time flow conditions via the web portal to evaluate flow patterns utilizing site-specific graphs and reports of the daily, weekly, and monthly flow patterns. The City of San Diego’s managers and field investigators used the data and statistics to determine when significant flows were occurring and to schedule dry weather flow observations for a higher probability of success at finding a meaningful source of the flow pattern. Highlights of the field investigations are provided below:
During the 2017-2018 monitoring year, Alta is deploying the MS4 Flow SystemTM at all 30 of the City of San Diego’s persistently flowing outfalls to collect continuous data in conjunction with the non-storm water persistent flow MS4 outfall discharge monitoring.
Our water resources services continue to grow as our clients face compliance challenges related to the drought, water use restrictions, and new storm water regulations. To learn more about our water resources services, including how Alta’s MS4 Flow System can be applied to you program, please give us a call at 888-608-3010 or email our water resources experts:
David Renfrew, QISP/ToR, QSD, CPSWQ, PMP, can be reached via email at firstname.lastname@example.org.
Garth Engelhorn, QISP/ToR, CPSWQ, can be reached via email at email@example.com