(1) The lower soil zone which is enriched by the deposition or precipitation of material from the overlying zone - or A

Before present.

To make a continuous low - murmuring sound - as flowing water.

See Biological Activated Carbon (BAC) Process.

Generally refers to lands lying back from and not contiguous to a highway or water course.

A pressure that can cause water to Backflow into the water supply when a user

A reverse flow condition created by a difference in water pressures that causes water to flow back into the distribution pipes of a drinking water supply from any source other than the intended one. Also referred to as Backflow.

Marshy area of a flood plain at some distance from and lower than the banks of a river confined by natural levees.

A channel formed behind a bar connected to the main channel but usually at a higher bed elevation than the man channel. Backbar channels may or may not contain flowing or standing water.

process of filling the notches carved in the earth from strip mining in order to restore the original slope. This is intended to reduce soil erosion and allow for the reestablishment of vegetation.

(1) The backing up of water through a conduit or channel in the direction opposite to normal flow. (2) The undesirable flow of water from a plumbing system back into the community potable water supply (3) A reverse flow condition created by a difference in water pressures that causes water to flow back into the distribution pipes of a drinking water supply from any source other than the intended one. Backflow prevention assemblies prevent contamination and are required by city and state laws. Also referred to as Back Siphonage.

A device that allows liquids to flow in only one direction in a pipe. Backflow preventers are used on sewer popes to prevent a reverse flow during flooding situations. Also referred to as a Check Valve.

The seaward return of water after the landward motion of a wave. Also referred to as Backwash.

An eddy or countercurrent in water.

The part of a shore between the Foreshore and the landward edge that is above high water except in the most severe storms.