Abington Friends in Tookany Watershed

This site is located at the headwaters of the Jenkintown creek. Our team is working closely with the Tookany/Tacony - Frankford Watershed Partnership (TTF), Abington Friends School , the designers at AKRF, and Cerulean Environmental to ensure that our instrumentation is fully functioning into the design of the rain garden implemented at this site. The rain garden was constructed in November 2015 and planted April 2016. This SCM joins a series of current efforts, including a bioretention basin, riparian buffers, and another rain garden downstream, to improve the creek's water quality.

The rain garden is designed for:

  • Drainage Area = 17, 463 SF
  • Storm Size Managed = 1 in
  • Volume of Water managed = 1,455 CF

 

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Abington Friends School Rain Garden

At the Abington site, our team is currently collecting weather, soil moisture, water quantity, and water quality data.

Weather 

To accurately portray climate conditions in our models, in July 2015, our team installed a weather station at Abington that measures rainfall, temperature, solar radiation, wind speed, barometric pressure, and humidity. The installed sensors include a MetOne 360 precipitation gauge, a MetOne anemometer, and an Apogee pyranometer. All of the weather parameters are logged in 5 minute intervals and uploaded every 15 minutes to this website.

The Weather Station
The Weather Station

Soil Moisture 

In April 2016, our team installed Hydra probe II below grade throughout the rain garden to measure soil moisture, temperature and conductivity. All of the data is logged and uploaded with the weather data. Additionally, to monitor infiltration within the rain garden bowl, a bubbler was installed to measure water level during storm events and infiltration.

Water Quantity

In February 2015, our team installed a Unidata flow meter behind Abington Friends School and Abington Meeting, at Meetinghouse Road.  We have used the flow meter to collect both baseline (i.e.. preconstruction) and post-construction flow, depth, velocity, and water temperature data. The flow meter enables our team to determine the impact of the installed stormwater control measures (SCMs) on the creek. Comparing data collected by the flow meter to data collected by the weather station on-site allows our team to analyze the creek’s response to storm events.

At the rain garden itself, our team installed a pressure transducer with an orifice restrictive device (ORD) to measure outflow from the SCM.

Jenkintown Creek: Precipitation vs Depth

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Sarah standing next to flow meter communication box at Abington Friends School

Water Quality

During both storm events and baseflow conditions, water samples are collected from the site and analyzed for total suspended solids (TSS), total dissolved solids (TDS), nitrogen, and phosphorus. Grab samples are collected from the rain garden bowl, the rain garden outflow, and three points downstream of the rain garden. Additionally, our team installed an autosampler that collects a composite sample from the rain garden bowl during storm events. Water testing for the site began in August 2015.

Autosampler
The autosampler taking a sample