Title

Green Roof Leachate Water Quality

Presenter Information

Katherine Bartels

Department

Civil, Architectural and Environmental Engineering

Major

Environmental Engineering

Research Advisor

Burken, Joel G. (Joel Gerard)

Advisor's Department

Civil, Architectural and Environmental Engineering

Funding Source

Opportunity for Undergraduate Research Experience

Abstract

Green roofs provide many environmental benefits such as peak flow attenuation, runoff reduction, and increased roof life expectancy. However, green roofs need media capable of sustaining vegetation, requiring nutrients (nitrogen and phosphorus). Water leaching from green roof media carries nutrients from the rooftop and enters nearby water bodies. In addition to nutrients in green roof runoff, organic carbon and suspended solids are a concern. Prolonged leaching over time leads to eutrophic and anoxic conditions, inhibiting aquatic life.

Three cylinders filled 3” deep with green roof media: GAF, Arkalyte, and one control of Thermoplastic Polyolefin (TPO), performed in triplicate, were used in an in-vitro study simulating 1-year 30-minute precipitation events for Rolla, Missouri. Results demonstrated a decrease in suspended solids, organic carbon and nutrients in green roof leachate over time for the media tested. Assessing water quality is imperative to fully understanding the implications of green roof implementation.

Biography

Katherine Bartels is a sophomore in environmental engineering and is also planning on minoring in sustainability. On campus she is a member of the Water Environment Federation, Society of Women Engineers, and Eco Miners Students for a Sustainable Future. Her interests include playing tennis, photography, and crocheting.

Research Category

Engineering

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hall

Presentation Date

15 Apr 2015, 1:00 pm - 3:00 pm

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Apr 15th, 1:00 PM Apr 15th, 3:00 PM

Green Roof Leachate Water Quality

Upper Atrium/Hall

Green roofs provide many environmental benefits such as peak flow attenuation, runoff reduction, and increased roof life expectancy. However, green roofs need media capable of sustaining vegetation, requiring nutrients (nitrogen and phosphorus). Water leaching from green roof media carries nutrients from the rooftop and enters nearby water bodies. In addition to nutrients in green roof runoff, organic carbon and suspended solids are a concern. Prolonged leaching over time leads to eutrophic and anoxic conditions, inhibiting aquatic life.

Three cylinders filled 3” deep with green roof media: GAF, Arkalyte, and one control of Thermoplastic Polyolefin (TPO), performed in triplicate, were used in an in-vitro study simulating 1-year 30-minute precipitation events for Rolla, Missouri. Results demonstrated a decrease in suspended solids, organic carbon and nutrients in green roof leachate over time for the media tested. Assessing water quality is imperative to fully understanding the implications of green roof implementation.