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"Water body with perennial flow" means a body of water that flows in a natural or manmade channel year-round during a year of normal precipitation. This includes, but is not limited ro streams, estuades, and tidal embaymems and may include drainage ditches or channels constructed in wetlands or from former natural drainageways, which convey perennial flow. Lakes and ponds, through which a perennial stream flows, are a pan of the perennial stream. Generally, the water table is located above the streambed for most of the year and groundwater is the primary source for stream flow. "Water-dependent facility" means a developmem of land that cannot exist outside of the Resource Protection Area and must be located on the shoreline by reason of the intrinsic nature of its operation. These facilities include, but are not limited to (i) ports; (ii) the intake and outfall structures of power plants, water treatment plants, sewage treatment plants, and storm sewers; (iii) marinas and other boat docking structures; (iv) beaches and other public water-oriented recreation areas; and (v) fisheries or other marine resources facilities. "Wetlands" means tidal and nontidal wetlands. Section 9.1-4. Chesapeake Bay Preservation Area Overlay District Map; Applicability. (a) The boundaries of the district are hereby established as shown on the map sheet entitled "Chesapeake Bay Preservation Areas, Portsmouth, Virginia," dated September 1, 1990, which accompanies and, together with all explanatory material thereon, is hereby declared to be a pan of this Chapter, the said map sheet hereinafter being referred to as the Chesapeake Bay Preservation Area Map. (b) The Chesapeake Bay Preservation Area Overlay District shall apply to all lands identified and designated as CBPAs by the City Council, as shown on the Chesapeake Bay Preservation Area Map. (1) At a mmimum the Resource Protection Area (RPA) shall include: a. Tidal Wetlands; b. Nontidal wetlands connected by surface flow and contiguous to tidal wetlands or water bodies with perennial flow; c. Tidal shores; and d. A 100-ft. vegetated buffer area located adjacent to and landward of the components listed in subsections (a) through (c) above, and along both sides of any water body with perennial flow. (2) The Resource Management Area (RMA) is defined as adjacent to the RPA and shall be composed off (a) The 100-year floodplain as identified on the Federal Emergency Management Agency Flood Insurance Rate Map dated November 11, 1983; and