Rain gardens are one of many sustainable or low impact
development practices used to treat stormwater runoff,
often referred to as “green infrastructure”. Rain gardens
treat stormwater as a resource; as opposed to the more
conventional approach where stormwater treatment
included removing stormwater as quickly as possible
from the landscape and directing it to the nearest
water body. By definition, a rain garden is a shallow,
landscaped depression that facilitates the infiltration of
stormwater runoff from impervious surfaces, confining
it while it allows for slow percolation into the ground
over 24-48 hours. This seepage of the stormwater
runoff allows the physical settling out of sediment
and adsorption of some nutrients such as phosphorus.
Nutrient concentrations are reduced through biological
and chemical processes as plants have the opportunity
to uptake nutrients. The plants in this depression area
are selected based on their ability to withstand being
inundated with standing water for a period of time;
however, it is also this ponding area which can cause
concerns regarding mosquito production.
Tags:
mosquitoes, rain gardens, life cycle, larvae
Publication Number:
FS1175
Author(s):
Teresa Duckworth
Christopher Obropta
Pat Rector
Publisher:
Rutgers NJAES Cooperative Extension
Date Published:
2/16/2012
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