If the subdivision is traversed by any water course, channels, streams or creeks, the subdivider may be required to provide by dedication or otherwise rights-of-way or easements for storm drainage purposes conforming substantially with the lines of such water courses, channels, streams or creeks. Where design permits, the center of said easement shall be substantially the same as the center of the water course and shall serve as the common property line of abutting lots. The subdivider shall provide by dedication or otherwise further and sufficient rights-of-way or easements as shall be required for structures or channel changes or both, to dispose of surface and storm waters.