For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BASE FLOOD. A flood having a 1% chance of being equaled or exceeded in any given year.
DRY BOTTOM RESERVOIR. An earthen detention basis constructed so that it drains completely after the rain storm and associated flows subside.
EXCESS STORM WATER RUN-OFF. The portion of storm water run-off resulting from the proposed land use and which exceeds the run-off from the existing land use for a storm with a five-year average recurrence interval.
FIVE-YEAR RAINFALL. A precipitation event have a 20% chance of occurring in any one calendar year.
FLOODPLAIN. The land area susceptible to being inundated temporarily by flood water from an adjacent watercourse.
FLOODWAY. The channel of a river or other watercourse that must be reserved for passage of the base flood.
IMPERVIOUS AREA. This would be an area that will not absorb water in a developed site such as a parking lot, driveway, roof area, sidewalk and the like.
PARKING LOT DETENTION. The parking lots may be utilized for storm water detention with the following restrictions.
(1) There should be no more than seven inches of water depth in remote areas of the parking lot or four inches in heavy traffic areas under design storm conditions.
(2) The parking lot may not violate appropriate provisions of other ordinances governing their design and operation.
PROTECTED CHANNEL. A channel which receives storm water discharge and is constructed of pavement, rip-rap or human-made materials to reduce the potential for erosion.
RESERVOIR. The place where water is collected and kept in quantity for use or for later release for a beneficial purpose.
STORM WATER CHANNEL. A natural or human-made open watercourse with definite bed and banks which periodically or continuously contains moving water, or forms a connecting link between two bodies of water.
STORM WATER RUN-OFF. The fraction of the water resulting from precipitation which flows from the served land during and immediately after the rainfall.
STORM WATER RUN-OFF RELEASE RATE. The rate at which storm water run-off is released from dominant to servient land or, in the case of detention, the discharge rate from the detention facility.
(2007 Code, § 34-6-46)