Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>iMap updated: April 8, 2026</SPAN></P><P><SPAN>This layer represents mapped alluvial fan areas compiled from multiple sources:</SPAN></P><UL><LI><P><SPAN>Oyster River alluvial fan derived from Kerr Wood Leidal (2021) Coastal Flood Mapping Project (Technical Memorandum #2 – Fluvial and Coastal Geomorphology)</SPAN></P></LI><LI><P><SPAN>Additional alluvial fan features derived from the Province of BC Flood Hazard Mapping dataset (2004)</SPAN></P></LI></UL><P><SPAN>Alluvial fans are geomorphic features formed by sediment deposition where watercourses exit confined valleys. These areas may be subject to flooding, sediment deposition, channel avulsion, and debris flow hazards.</SPAN></P><P><SPAN>This layer supports identification of areas where further professional assessment may be required under Flood Hazard Area Bylaw No. 890.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Kerr Wood Leidal Associates Ltd. (2021)
Province of British Columbia – Flood Hazard Mapping Program (2004)
Comox Valley Regional District (data compilation and maintenance)
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This feature class contains polygon representations of modeled coastal flood extents developed by Kerr Wood Leidal (KWL) as part of the Coastal Flood Mapping Project (2021).</SPAN></P><P><SPAN>The flood extents are derived from the regulatory coastal flood limit linework and represent the spatial extent of inundation under the modeled scenario, which includes:</SPAN></P><P><SPAN>- 0.5% Annual Exceedance Probability (AEP) storm event (200-year return period)</SPAN></P><P><SPAN>- 1.0 m sea level rise</SPAN></P><P><SPAN>- 0.6 m freeboard allowance</SPAN></P><P><SPAN>The polygons were generated for mapping and visualization purposes using the flood limit linework and shoreline closure, and do not represent dynamic flood timing or wave processes across the study area.</SPAN></P><P><SPAN>In KWL documentation, these extents are described as “regulatory floodplain extents” because they are used to inform flood construction levels (FCLs) and support regulatory planning. However, within CVRD systems, this dataset is maintained as a representation of modeled flood inundation (water extent), separate from regulatory development boundaries.</SPAN></P><P><SPAN>Users should be aware that the flood extents represent a modeled scenario and may not reflect all local conditions or future changes. Flood levels may vary spatially and temporally, and peak water levels may not occur simultaneously across the entire mapped area.</SPAN></P><P><SPAN>For regulatory development constraints, refer to the Building_DesignatedFloodplains dataset, which incorporates bylaw-based hazard areas including coastal setbacks and additional planning considerations.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Kerr Wood Leidal Associates Ltd. (KWL)
Source data derived from:
Coastal Flood Mapping Project (2021)
Technical Memorandum #5 – Coastal and Fluvial Mapping Products
Prepared for the Comox Valley Regional District (CVRD)
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>iMap updated: April 8, 2026</SPAN></P><P><SPAN>This dataset represents historical floodplain mapping produced by the Province of British Columbia and digitized from legacy hardcopy floodplain maps. The mapping reflects study methods, assumptions, and flood hazard understanding at the time of production (late 1980s–1990s) and may not reflect current flood hazards, climate conditions, or updated floodplain studies. This dataset is retained for reference and inventory purposes and may be superseded by more recent floodplain mapping where available.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Province of British Columbia
Data sourced from: Mapped Floodplains in BC (Historical), DataBC