In
Brief:
| Two rain gardens were constructed in CT according to the specifications in the Prince George’s County MD design manual. They were sited to each be able to capture and treat the first 0.5 inches of roof runoff, making the total capacity 1”. Each rain garden was lined with plastic to be able to collect all the infiltrated runoff. Perforated PVC pipe was installed at the bottom of the garden to collect the water and was surrounded with stone. Native soil (loamy sand) filled the rest of the garden and then it was topped with a 5cm layer of mulch. Native vegetation including chokeberry (Aronia prunifolia), winterberry (Ilex verticillata) and compact inkberry( Ilex glabra compacta)was planted in each garden. Garden 1 was 84.4% sand, 7.6% silt, 8.0% clay with an infiltration capacity of 12.6cm/hr. Garden 2 was 83.6% sand, 10% silt, 6.4% clay with an infiltration capacity of 10.3cm/hr.
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