A. All subdivisions of land shall comply with the design and improvement requirements established in this division for the protection of flood hazard areas and the prevention of erosion.
B. For the purposes of these regulations, drainage shall be classified as follows:
1. Major tributary. Any channel having a drainage basin of not less than one (1) square mile or greater than twenty-five (25) square miles.
2. Minor tributary. Any drainage channel having a drainage basin of six hundred forty (640) acres (one (1) square mile) or less in area.
3. River. Any channel having a drainage basin of greater than twenty-five (25) square miles.
4. Surface drainage. The runoff of such a limited quantity or slow rate that it does not cause erosion of a defined channel.
(Code 1991, § 12-495)