Flooding poses a serious risk to public health and safety. Professional guidelines should be followed when completing flood mitigation projects.
Flood Risk Assessment Guideline
Professional practice guidelines for flood assessments identify the circumstances when risk assessments are appropriate and emphasize the need to consider climate change and land use changes.
- Professional Practice Guidelines – Legislated Flood Assessments in a Changing Climate in B.C. (PDF, 3.27MB)
- Guidance for Selection of Qualified Professionals and Preparation of Flood Hazard Assessment Reports (PDF, 144KB)
Flood Mapping and Guidelines
Floodplain maps identify areas that experience periodic flooding from nearby rivers, lakes, streams and the sea and provide information on the spatial distribution of flood construction levels.
The guides below are to assist professionals in developing high quality LiDAR and flood maps in a consistent manner, incorporating best practices.
Land Use Management
Experience has shown that land use management and flood proofing areas susceptible to flooding are the most practical and cost-effective ways to reduce the effect of flooding on lives and property.
A factsheet prepared by the Ministry of Agriculture, Food and Fisheries provides general guidelines of land use management and setback requirements for flood hazard areas in the absence of site-specific information.
The Local Government Act requires local governments to consider these Flood Hazard Area Land Use Management Guidelines for floodplains.
Dike Management and Safety
As defined in the Dike Maintenance Act, a dike is an embankment, wall, fill piling, pump, gate, floodbox, pipe, sluice, culvert, canal, ditch, drain, or any other structure that is constructed, assembled, or installed to prevent the flooding of land. In British Columbia, dikes are works that address major flood hazards.
Flood Risk Management in the Lower Mainland
An information portal is available on flood risk management in the Lower Mainland. It contains links to reports on flood strategies, regional flood vulnerabilities, and a review of flood protection infrastructure, policies, and practices.
The Fraser Basin Council prepared a report that analyses flood management practices and policies that relates to environmental impacts caused by flooding.