Lower Mainland Flood Map

Learn about flood maps and where to find them. Coastal storm surge flood scenarios. A lower fraser river 2d flood modelling and mapping project was completed in late 2019 as an important component of the lower mainland flood management strategy.

Following an rfp process, northwest hydraulic consultants was retained for the work, initial runs underway in the fall of 2018, and the work completed in late 2019. The 1894 event was the largest flood ever recorded in the lower mainland, driven by an above average winter snowpack and hot spring conditions. Lower fraser river 2d flood modelling and mapping project.

Floodplain maps typically show the locations of watercourses or water bodies, surrounding features, ground elevation contours, flood levels and flood hazard area.

These maps exclude flood hazard areas in the lower mainland outside of the fraser river flood hazard area, such as boundary bay, burrard inlet, lions bay, and squamish. Lower fraser river 2d flood modelling and mapping project. These maps are based on modelling a limited number of fraser river and coastal flood scenarios and are helpful for regional planning purposes. A new map revealing which areas in the lower mainland are most susceptible to climate change has highlighted richmond’s vulnerability to flooding, ground level ozone and higher summer temperatures.