Glossary

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Glossary terms for letter: V

Vegetated Buffer:

Vegetated areas separating a waterbody from a land use and its associated runoff. Vegetated buffers (or simply buffers) are variable in width and can range in function from vegetated filter strips to wetlands. Often serves as valuable wildlife habitat or corridors.

Vegetated Filter Strip (Sediment Traps and Barriers):

Created areas of vegetation designed to remove sediment and other pollutants from surface water runoff by filtration, deposition, infiltration, adsorption, decomposition, and volatilization. A vegetated filter strip is an area that maintains aeration as opposed to a wetland, which at times exhibits anaerobic soil conditions.

Vegetated Geogrid:

Soil wrapped with a geotextile fabric and with live woody plant cuttings placed in between each soil/geotextile wrap.

Vegetated Structures:

A retaining structure in which living plant materials, cuttings, or transplants have been integrated into the structure.

Vegetative Cuttings:

Live, cut stems and branches of plants that will root when embedded or inserted in the ground.

Vegetative Measures:

The use of live cuttings, seeding, sodding, and transplanting in order to establish vegetation for erosion control and slope protection work.

Vegetative Rock Gabion:

A structure built of metal wire baskets filled with rock and soil. These structures are then interplanted with woody plant material.

Velocity:

The distance that water travels in a given direction during an interval of time.

Velocity Zone (V-Zone):

A zone subject to velocity-water flooding during storms that have a 100-year recurrence interval. In coastal areas, the V-Zone generally extends inland to the point where the 100-year flood depth is insufficient to support a three (3)-foot high breaking wave.

Vernal Pool:

Seasonally wet pool, most frequently wet in winter and spring and dry in summer.

 

Revised 5/15/07

Institute for Water Resources