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.
DETENTION POND. See § 152.157 above.
DRY BOTTOM RESERVOIR. An earthen detention basis constructed so that it drains completely after the rainstorm 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.
FLOOD PLAIN. 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. 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; and
(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, riprap 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.
RETENTION POND. See § 152.158 above.
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.
(2001 Code, § 34-6-46)