| Learn About the Paired
Watershed Approach |
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1. Automated
Introduction to the Paired Watershed Approach for
Jordan Cove (6:39 minutes. 2006.
By Dr. Michael Dietz.)
This is a narrated video presentation
designed to describe the paired watershed approach,
and can be paused and started as desired.
NOTE: You
need to have a copy of Flash Player installed
on your computer to view this video. See the About
Website section if you need to download
a copy of Flash Player.
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2. Paired
Watershed Study Design Fact Sheet - 1993.
Written by Dr. John C. Clausen and Dr. Jean Spooner,
North Carolina State University, and reviewed
by Steve Dressing, U.S. EPA.
The purpose of this fact sheet is to describe the
paired watershed approach for conducting nonpoint source
(NPS) water quality studies. The fact sheet describes
the statistics used.
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| Learn
About the Project's Control and Treatment Watersheds |
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The control watershed was
an existing 14-acre residential watershed containing 43
lots built in the same general vicinity of the treatment
watersheds in 1988. Stormwater runoff was monitored at
the outflow of a stormwater pipe at the watershed outlet.
This watershed allowed for researchers to factor out
weather differences from year to year, when comparing data
between the treatment and control subdivisions. |
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The traditional watershed (treatment) was
five acres in size and contains 17 residential lots.
This watershed was developed using standard zoning and construction
practices. It is accessed by a 24 foot wide asphalt road
with typical curb and gutter stormwater conveyance system. |
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The four acre LID
watershed (treatment) now
contains 12 lots. A host of LID practices/BMPs were used.
A cluster approach was used to aggregate homes closer
together, leaving more open space in the watershed. Shared
driveway entrances reduced imperviousness. Lawn sizes
were reduced and low-mow and no-mow areas were designated
to reduce fertilizer and maintenance impacts. The access
road is narrower (20 ft.) than typically allowed by ordinance
and was constructed of interlocking concrete pavers that
allow infiltration. Rain gardens were installed in each
lot and a bioretention area in the cul-de-sac was installed. |
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