Construction Management & Sustainability Research Shadyside Giant Eagle Green Roof ProjectGreen Roofs
This green roof is part of the 3 Rivers Wet Weather Demonstration Program (3RWWDP) Green Roof Demonstration Project. The 3RWWDP is a non-profit organization formed as a partnership of the Allegheny County Health Department (ACHD) and the Allegheny County Sanitary Authority (ALCOSAN). They are looking to solve the CSO problem and improve the overall water quality in Allegheny County. The green roof demonstration project is one of the tools the organization is using to clean up Pittsburgh's water. The project encompasses the Shadyside Giant Eagle green roof and three others: Hamerschlag Hall on the campus of Carnegie Mellon University, the Terminal Building on Pittsburgh's Southside and a building on 8th Avenue in Homestead. The goal of the demonstration project is to determine the benefits of the green roof specific to the Pittsburgh region. To do this, each site will have a green roof and a conventional roof. Both types of roofs will contain monitoring equipment. By comparing the two sets of measurements at each site, the water and thermal benefits can be quantified. Combining the results of the four projects will give a better view of the affect of green roofs on the Pittsburgh region than a single site. Besides the Giant Eagle site, the University of Pittsburgh will also monitor the Terminal Building when the green roof is installed. Carnegie Mellon is currently monitoring Hamerschlag Hall. The results of the Shadyside Giant Eagle green roof are divided into three sections, as discussed below. Real time results and a history of recent measurements are viewable by clicking on the links on this webpage. They can be viewed in any web browser, but a plug-in is required The first set of results is dedicated to water. A rain gauge located on the roof tracks the rainfall for each storm. A 4000 square foot area of each roof is monitored for accumulated runoff volume and flow rate. The water content of the soil is also monitored and available on this page. Water samples are collected for testing at the Civil and Environmental Engineering laboratories. When a sample is taken, it is indicated on the web page. The temperate measurements are broken up into two web pages. There are two temperature monitoring stations on each roof. A temperature profile of the roof, from below the roof deck to one meter above the roof surface, is included in the first page. Thermocouples are used for these measurements and are important in determining the insulation value of the roof and the reduction in the urban heat island effect. Finally, the remaining temperature results are presented in the third webpage. Relative humidity and ambient temperature is listed for each roof, along with soil temperature. Wind speed and wind direction are also recorded. Measurement Summary
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Green Roof Project |
The Shadyside Giant Eagle is a recently remodeled and expanded supermarket with underground parking and five stories of condominiums at the rear of the building. 12,300 square feet of the expanded store is covered with an extensive roof with a five and a half inch thick growing medium and a palate of plants with Sedums as the largest portion. The other 21,000 square feet of the roof is a conventional gravel ballasted roof.Green COnstruction research
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