Glossary of Terms
| A Note on Terminology |
At the beginning of this project, “low
impact development” (LID),
was not a familiar term to most people, although the
term “best management practice” (BMP)
was fairly common. LID embodies an approach of developing
a site, whereas BMP refers to those individual practices
that may be components of LID site design. Therefore,
on this website, the model subdivision will be
referred to as the “LID subdivision”,
but when discussing the individual practices used,
the term BMP will be used. |
BMP
Best Management Practice. A device, practice, or
method for removing, reducing, retarding, or preventing targeted
stormwater runoff constituents, pollutants and contaminants
from reaching receiving waters. (US EPA, 2002. Urban Stormwater
BMP Performance monitoring: A Guidance Manual for Meeting
the National Stormwater BMP Database Requirements).
|
Low Impact Development
A new comprehensive land planning and engineering
design approach with a goal of maintaining and enhancing
the pre-development hydrologic regime of urban and developing
watersheds. (LID center, http://www.lowimpactdevelopment.org/about_us.htm)
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| Graph
and Table Terminology for the Results Section |
BOD |
5-day biochemical oxygen demand |
Cu |
Copper |
| Mass Export |
The mass of a pollutant leaving a site, per unit area.
This is calculated by multiplying a concentration (e.g.,
mg/L), by volume (e.g., cubic meters), to obtain a mass
per unit area, per unit time (e.g., kilogram/hectare/year). |
NH3-N |
Ammonia nitrogen |
NO3-N |
Nitrite + nitrate nitrogen |
Pb |
Lead |
Return Period |
A return period also known as a recurrence interval is
an estimate of the likelihood of a flood or river discharge
flow of a certain size. It is a statistical measurement
denoting the average recurrence interval over an extended
period of time. |
TN |
Total nitrogen |
TP |
Total phosphorus |
TSS |
Total suspended solids |
Zn |
Zinc |
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