2018-2019 Results of the Thompson Watershed Risk Assessment
Project Deliverables Now Available
Here are the final 2018-2019 deliverables for the Thompson Watershed Risk Assessment, as completed March 31, 2019 by BGC Engineering, with project coordination by the Fraser Basin Council.
Thompson River Watershed Geohazard Risk Prioritization Report.
Read the report (PDF: 16 MB).
Interactive Geohazards Map of the Thompson Watershed
This online map is the best way to view and interact with the results of the assessment. The map features layers on political boundaries, hydrology, hazard areas (by hazard type, hazard rating, priority rating and consequence rating), other hazards in the watershed, elements at risk, flood infrastructure, transportation routes & lifelines, and environmental values. Appendix H provides a guide to the online map.
How to Apply for Map Access
BGC Engineering hosts on the online map. The map will be available to access for employees of local governments, First Nations or tribal councils in the region and by the employees of federal departments or agencies until at least 2020.
To gain access for the first time, apply at Cambio Communities. Enter your name and email address to submit an access request to BGC Engineering, which will follow up with a link and temporary password.
Geodatabase with Prioritized Geohazard Areas
This database is available to download. Download the database (Zipped GDB: 13 MB).
Excel Spreadsheet with Summary Statistics
Appendix J of the report is an Excel spreadsheet with summary statistics of results and attributes of prioritized geohazard areas. Download the spreadsheet (XLSX: 2MB).
Key Project Results
BGC Engineering Inc. (BGC) carried out a clear-water flood, steep creek (debris flood and debris flow), and landslide-dam flood risk prioritization of the Thompson Watershed, with the support of Kerr Wood Leidal Associates (KWL), with funding provided by Emergency Management BC (EMBC) and Public Safety Canada under Stream 1 of the Natural Disaster Mitigation Program (NDMP, 2018).
BGC Engineering characterized and prioritized the flood, steep creek and landslide hazards in the watershed that might impact developed properties. The goal was to support decisions that prevent or reduce injury or loss of life, environmental damage, and economic loss due to geohazard events.
In the assessment, BGC Engineering identified and prioritized 6225 geohazard areas encompassing over 4,000 km 2 (7%) of the watershed. About 30% of the watershed’s population, 50% of assessed building values, 30% of business locations, and most of the major transportation routes are within or cross these geohazard areas.
The risk assessment provides the following information for the Thompson River Watershed:
Risk Management Support for Communities
The report and maps are intended to inform future planning and development, emergency response during flood and debris flow, and guide future work to fill in gaps in information.
Those with flood management responsibilities may draw on the information for one or more of the following:
Local and First Nations governments are welcome to share these deliverables with their planning and development staff, and their emergency response staff. The online map can be used to explore the areas of risk identified, and detailed geospatial files and spreadsheets for use by mapping staff. See the detailed report for specific recommendations.
The Fraser Basin Council will continue to support project partners on the next steps. A funding application has been submitted to the National Disaster Mitigation Program for 2019/20 to generate topographical data collection by LiDAR of key areas where it does yet not exist. The data would support detailed flood mapping in select areas in the future. In coordination with TNRD, CSRD, CRD and RDNO, FBC has also submitted funding applications to UBCM’s Community Emergency Preparedness Fund for screening-level hydraulic flood mapping in select areas in 2019/20.
For further information, contact: