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What are Low Impact Development (LID) and Green Infrastructure (GI)?

Dr. Bill Hunt and Stantec’s Jennifer Young describe what conservation efforts can manage stormwater runoff

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<table border="0" cellspacing="0" cellpadding="0"> <tbody><tr><td width="514" valign="top"><p>Dr. Bill Hunt, Ph.D., P.E., North Carolina State University</p> <p>in the past, we captured water in sort of like a big tank. We call them ponds. Anyway, we discharged it, and that did a pretty good job of reducing flooding downstream, um, and it did s-, for certain pollutants, it, it treated some pollutants, but that's pretty much where it ended.</p> <p>LID and its sort of newer cousin, green infrastructure, basically al-allow us to evaluate and give credit to innovative stormwater so that people want to use it.</p> <p>LID is a development philosophy that focuses on the water footprint.</p> <p>Green infrastructure is taking a more holistic look at your stormwater management system</p> <p>&nbsp;</p> <p>Jennifer Young, LID Specialist and Senior Water Resources Engineer, Stantec</p> <p>LID can be used on low infiltration rate soils. So poorly draining soils with infiltration rates of a millimeter per hour or less actually can use LIDs and they've been being used on those soils successfully. Also winter is not a big factor for LID. LID still works in the winter and it may experience some performance loss, but it still will provide the treatment infiltration that we're looking for.</p> <p>&nbsp;</p> <p>Dr. Bill Hunt, Ph.D., P.E., North Carolina State University</p> <p>one of the benefits you're going to get is one of reduction, and you get water quality improvement, but then there's a lot of other things like air quality benefit, heat island benefit, heat island mitigation, uh, recreational, social benefits. </p> </td> </tr></tbody></table>

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