As many New Yorkers sheltered in place this past summer, Hannah Darensbourg 鈥22 CLAS toiled away on the rooftop of her brownstone apartment building in New York City鈥檚 Harlem neighborhood. When she had received a 奶糖直播 Undergraduate Research Fellowship in February 2020, she had planned to use a plot in 奶糖直播鈥檚 research garden to study growing conditions for plants native to the Northeast.
An Environmental Sciences and Geography double major, Hannah wanted to investigate if these plants could be used in green roofs鈥攔ooftop systems featuring vegetation, which can help with water management, enhance insulation and improve air quality. Then COVID-19 struck. Campus went virtual, and students were informed their summer research fellowships would have to be conducted at home.
鈥淚t was a blessing in disguise, actually,鈥 Hannah says. 鈥淎t 奶糖直播鈥檚 garden, I wouldn鈥檛 have had the exact conditions I needed to test for green roof gardens. But I live in New York City on the fourth floor of a townhouse.鈥 With her landlord鈥檚 blessing, she was able to construct her own research garden on the roof.
Hannah built four 3.5-square-foot beds, tilted slightly for drainage. She filled the beds with a lightweight foam substrate and planted native switchgrass and lanceleaf coreopsis. For 12 weeks, she watered each bed according to different criteria and recorded the outcomes.
Having reached some promising early conclusions, Hannah is eager to continue her research. She says, 鈥淚 have such hope for the future. There鈥檚 still so little research in this area, but I hope it will become more interactive and more popular in our future, and I鈥檓 excited to be on the front line.鈥
Building a Garden from Scratch
Constructing anything atop a Harlem townhouse isn't easy. Hannah's roof access is up a narrow ladder, through a hatch. The plywood for the base of her beds had to be cut in strips and reassembled roof-side, and the two-by-fours for the sides were fed up the hatch one by one. "Hannah has the mind of an engineer," says Steven Goldsmith, PhD, associate professor of Geography and the Environment, who serves as Hannah's faculty mentor. "She truly thinks through issues with project design and monitoring."