The regulations and standards of this title are to protect the various portions of the urban area from flooding, to provide clean and sanitary channels for runoff, to prevent pollution of watersheds, streams and natural drainage channels, to prevent the encroachment of buildings and improvements on natural drainage channels, to equitably apportion the cost of improvements, to protect natural scenic areas, and to provide for the conservation of the natural resources of the area. (Ord. 1978-10, 10-3-1978)