(A) Hydrological determination of the nature and magnitude of the regulatory flood, by the U.S. Housing and Urban Development (HUD), was based on engineering calculations which permit a consideration of hydrologic factors as rainfall patterns infiltration rates, slope of watershed and length of watercourse.
(B) The computation of the floodway zone required to convey the regulatory flood without increasing the stage of this flood by more than 1 foot at any point.
(C) Delineation of floodway encroachment lines within which no obstruction is permitted which would impede the flow of water. The floodway encroachment lines are the exterior limits of the floodway zone.
(D) Delineation of the floodway fringe zone being that area outside the floodway encroachment lines but which is still subject to inundation by regulatory flood.
(Ord. passed 5- -1977)