In order to accomplish its purposes, this chapter includes methods and provisions for:
   A.   Restricting or prohibiting uses which are dangerous to health, safety, and property due to water or erosion hazards, or which result in damaging increases in erosions, flood heights, or velocities;
   B.   Requiring that uses vulnerable to floods, including facilities which serve such uses, be protected against flood damage at the time of initial construction;
   C.   Controlling the alteration of natural floodplains, stream channels, and natural protective barriers which help accommodate or channel floodwaters;
   D.   Controlling filling, grading, dredging, and other development which may increase flood damage; and
   E.   Preventing or regulating the construction of flood barriers which will unnaturally divert floodwaters or which may increase flood hazards in other areas. (1988 Code § 7.36.020)