Province of Saskatchewan/ Province de Saskatchewan

Purpose

The general scope of this project is to complete a river hydraulics model to update the flood mapping for the City of Prince Albert. State of the art modeling and mapping techniques will be required to complete the study with a three phased approach being implemented: Phase 1-Data Acquisition and Review: - Review previous hydraulics and flood mapping reports and establish model domain area in order to identify data gaps to complete the modeling. - Conduct a hydrographic river survey to measure bathymetry profiles of the North Saskatchewan River and the Spruce River within the study area; and - Summarize available data regarding infrastructure (i.e. culverts, bridges, outfalls, storm water connectivity, etc.) Phase 2 - River Hydraulics Modeling: - Complete a statistical analysis of historical stream-flow data to estimate design flows for the 100-yr and 500-yr return periods for the North SK River and Spruce River. - Create geometric data for the hydraulic model of the study reach by including LiDAR and bathymetric data for the North SK River and Spruce River and set-up model parameters. - Calibrate-validate the model with observed/historic flood data and conduct a sensitivity analysis of critical parameters within the process Phase 3 - Flood Hazard Analysis and Reporting - Evaluate the two design flood events by using the hydraulics model and estimate water levels and velocity profiles of flood waters. - Apply and calibrate model for the design floods. - Identify the two flood hazard zones (floodway and flood fringe) and develop GIS based flood maps. - Identify possible mitigation measures to minimize the impact of design flood.