Non-technical Results
LID Subdivision (Post-construction)
Construction | Post-construction
What happened in the LID subdivision after construction?
The stormwater
runoff volume per unit area from the LID subdivision
after construction was 42%
less than
what ran off the undeveloped site! Imagine that the runoff before
construction is the small cylinder below (left). As a result of LID
practices, the stormwater running off the site decreased
to the size of the smaller cylinder!
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LID runoff pre-construction. |
LID runoff post-construction:
A 42% decrease! |
Although there was a large decrease in stormwater runoff, the amount
of a couple of pollutants leaving the site did increase. Sediment
and phosphorus export increased, due to some fertilization by homeowners
in the grassed swales and possible grass clippings. However, the
increase was much less than the increase in the traditional subdivision.
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