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Stefani Barlow

Title Summary Date ID Author(s)
Best Management Practice Fact Sheet 12: Filtering Practices

A stormwater filtering practice (FP) treats stormwater
runoff by passing it through an engineered filter media
consisting of either sand, gravel, organic matter, and/
or a proprietary manufactured product, collecting it in
an underdrain, and then discharging the effluent to a
stormwater conveyance system. FPs are stormwater
treatment practices that are often obtained from the
marketplace due to unique proprietary technologies
(see figure 1).

Sep 9, 2013 426-131 (BSE-87P)
Best Management Practice Fact Sheet 14: Wet Ponds

Wet ponds (WP) are ponds or lakes which provide treatment
and storage of stormwater. The water depth is set
by a structure known as an outlet structure. Wet ponds
are probably the most well-known best management
practice for treatment of stormwater. Because of their
size, they are usually designed to include storage above
the normal pool elevation. This added storage can provide
reductions in downstream flooding and assist in
protecting stream channels. They tend to be large; in
some cases, they can become a passive community
amenity (See Figure 1).

Sep 9, 2013 426-133 (BSE-79P)
Best Management Practice Fact Sheet 15: Extended Detention Ponds

Extended detention ponds (EDs) are dry detention ponds
that provide 12 to 24 hours of runoff storage during peak
runoff events (see figure 1). Releases from the ED ponds
are controlled by an outlet structure. During a storm
event, as the discharge restriction is reached, water backs
up into the ED pond. The pool slows flow velocities and
enables particulate pollutants to settle. Peak flows are
also reduced. ED ponds have the lowest overall pollutant-
removal rate of any stormwater treatment option,
so they are often combined with other upstream, lowimpact
development (LID) practices to better maximize
pollutant-removal rates. Due to their placement at the exit
point of the watershed, ED is often the last opportunity
to treat stormwater before it is discharged to a stream.
Because of its low treatment performance, an ED should
be viewed as the treatment option of last resort.

Sep 9, 2013 426-134 (BSE-82P)
Best Management Practice Fact Sheet 3: Grass Channels Sep 6, 2013 426-122 (BSE-88P)
Best Management Practice Fact Sheet 4: Soil Restoration Sep 6, 2013 426-123 (BSE-80P)
Best Management Practice Fact Sheet 7: Permeable Pavement Sep 6, 2013 426-126 (BSE-84P)
Best Management Practice Fact Sheet 8: Infiltration Practices Mar 2, 2012 426-127 (BSE-85P)
Understanding Soil Moisture Sensors: A Fact Sheet for Irrigation Professionals in Virginia

In the Commonwealth of Virginia, water resources are increasingly being scrutinized due to changing surface water or groundwater availability. Access to good quality water is a continuing concern, and in many communities, managing water use — particularly consumptive use — is a priority to conserve public water supplies to meet the needs of a growing population.

Sep 23, 2016 BSE-198P
Urban Stormwater: Terms and Definitions Sep 5, 2013 426-119 (BSE-78P)