Gary Wollenhaupt


  • Cutaway illustration of a rain garden showing the inlet from a parking area, temporary ponding area, mulch layer, native plants, bioretention soil, gravel bed, overflow inlet, and outflow pipe

    How professionals design rain gardens to effectively control stormwater runoff

    Rain gardens are a common feature of Sustainable Drainage Systems (SuDS) and are widely used in urban drainage design to manage stormwater and rainwater runoff, as well as promote sustainable drainage practices. In the urban environment, hard or impervious surfaces often block the natural process of infiltration, which means rainwater can’t soak into the ground.…