Glossary
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Glossary terms for letter: P
Palustrine:
Refers to wetlands with water less than six (6) feet deep; area dominated by trees,
shrubs and that are in, or relate to marshes.
Paved Flume (Runoff Conveyance Measure):
A small concrete-lined channel to convey water
down a relatively steep slope without causing erosion.
Peak Flow:
The maximum rate of runoff that occurs from a watershed during a storm event.
Peat:
Incompletely decayed dead plant material that has accumulated in low-oxygen conditions.
Perennial Stream:
Watercourse that flows continuously throughout the year.
Permanent Seeding:
Establishment of perennial vegetative cover with seed to minimize runoff,
erosion, and sediment yield on disturbed areas. Disturbed soils typically require amendment
with lime, fertilizer, and roughening. Mixtures are typically most effective, and species vary
with preferences, site conditions, climate, and season.
Permit:
A document granting permission to do something.
Pile:
A long, heavy timber, pipe, or section of concrete or metal to be driven or jetted into the
earth to serve as a support for a bulkhead, pier, etc.
Pile Rot:
The rotting of wood pile caused by being exposed to the weather.
Piping:
Flow of water through subsurface conduits in the bank.
Pocket Beaches:
Small beach systems typically bounded by rocky headlands. Because of the
presence of the headlands and the small size of these beaches, longshore currents are
relatively insignificant in the overall sediment budget.
Point Bar:
A bar found on the inside bank of a river at a bend.
Point Source Pollution:
Pollution coming from a well-defined origin, such as the discharge from
a pipe at an industrial plant.
Pond:
A small body of water, usually artificially created by damming, diking or excavating.
Smaller and shallower than a lake. Usually one (1) to eight feet deep and generally less than
eight (8) acres.
Pothole:
Shallow, marsh-like pond that may dry up at times of low rainfall; found in the prairie
states, especially Minnesota, North Dakota, and South Dakota, and adjacent regions of Canada.
Revised 5/15/07