LID on Campus
About Low Impact Development Tour
Low Impact Development (LID), also known as conservation site design or green infrastructure, is a process of sustainable development that conserves and protects natural resources. LID manages rainwater where it falls by integrating natural systems and best management practices (BMPs) into the site. By having less water run off the land, non-point source pollution is reduced, watersheds are protected, and water quality is improved. LID is especially important in urban and urbanizing areas where it is crucial to promote water conservation, protect our waterways and enhance green space.
Lawrence Tech is home to numerous LID techniques including a green roof, bioswale, porous pavers, naturalized areas, cisterns, and rain gardens ( see map ) . These techniques are highlighted in a new stormwater education trail funded by the Erb Family Foundation. The trail will provide educational benefits to a broad spectrum of the population including students, citizens, public policy makers, planners, landscape architects and engineers.
These gardens were planted in 2007 as part of a Rouge River Project research and outreach project. Both gardens were retrofit around existing catch basins, with optional underdrains and stone reservoirs included. The only difference between the two gardens is the composition of the planting soil. The addition of topsoil and clay in one of the gardens slowed down the infiltration rate; using more compost in the other increased the volume of water that can be stored.
This bioswale was completed in 2005 as part of the A. Alfred Taubman Student Services Center landscaping. The bioswale is 3 feet deep and consists of native grasses and shrubs over engineered soils designed to filter water run-off. The bioswale was designed to handle a 10-year storm event before overflowing into existing stormwater systems.
The vegetated roof retains approximately 70% of annual precipitation, with the remainder draining into this 12,000-gallon underground cistern. The cistern recycles the "grey" water into the Taubman Center to flush toilets.
This outdoor dining patio was constructed in 2009 with Uni-Lock Eco-Stone pavers. The porous pavers allow water to infiltrate into the engineered stone layer below. The 6-inch layer is designed to hold stormwater and allow it to infiltrate into the native soil layer below with zero run off.