The following is a contributing post from Eliana, who has a passion for rain gardens and green infrastructure:
When you were a university student, did you ever reimagine your campus landscape? Students at the University of Illinois did exactly that as an assignment for Landscape Architecture (LA) 452, Native Plants and Design.
The U of I campus has 84 miles of storm sewer, most of which drain rainwater directly to Boneyard Creek. The LA 452 students designed landscapes with elements that capture water and allow it to soak in on-site to reduce loads to the existing storm sewer and creek. These elements (called green infrastructure) include rain gardens, swales, and green roofs. The Environmental Protection Agency (EPA) sees green infrastructure as a way to create sustainable, resilient communities that improve water quality.
EPA has a competition called the Campus RainWorks Challenge that invites “student teams to design an innovative green infrastructure project for their campus showing how managing stormwater at its source can benefit the campus community and the environment.”
According to Jason Berner, EPA environmental protection specialist, who has been involved with administering the competition, it is a great way for students to see how green infrastructure is related to the larger campus master plan. “It moves us beyond single pilot projects, but at the same time, blends both small and large scale thinking,” he explained.
LA 452 instructor Tawab Hlimi is leading the U of I Campus RainWorks entry. Students in his class helped brainstorm ideas for the entry. One of those ideas is pictured. Student JiwonKim reimagined the grounds at the National Soybean Research Building (which happens to house Illinois-Indiana Sea Grant and the Illinois Water Resources Center). Native plant rain gardens intercept stormwater from the building roof and parking lot. During large storms, the design takes advantage of existing storm sewers by overflowing excess water to them.
Like many cities and universities, the U of I began installing storm sewers more than 100 years ago. Storm sewers benefit cities by draining flooded areas. However, they can overload receiving streams and cause unintended damage. Adding green infrastructure elements to the existing infrastructure helps ensure a healthier ecosystem on-site and downstream.
Per Hlimi, “Through a campus wide application of rain gardens, students hybridized native plantings with a superficial stormwater management strategy to meet multiple objectives: accommodating the ‘first flush’ of frequent storm events through detention, infiltration, and biofiltration, reducing the load on existing subsurface infrastructure, improving the water quality entering into the Boneyard Creek, creating habitat for pollinators, and rendering the campus landscape as living laboratory.”
Perhaps one day in the not too distant future, students won’t have to imagine green infrastructure on campus. They’ll see it.
Learn how you can put in a rain garden on your property by checking out the Southern Lake Michigan Rain Garden Manual.