EN 
FR 
Evaluating Nature-Based Solutions for Rainfall-Runoff Reduction
Implementing Partner: Build Change
Project Name: Evaluating Nature-Based Solutions for Rainfall-Runoff Reduction in Canada
This project assessed the effectiveness of nature-based solutions in mitigating flooding from heavy rainfall, integrating stakeholder insights.
Over 30 years, rapid population growth in Brandon has altered land permeability, increasing surface runoff and intensifying flood events.
By analyzing these changes, the study provides valuable guidance for sustainable flood management in the Assiniboine Watershed, promoting adaptive strategies that enhance resilience, restore natural hydrology, and reduce flood risks in response to evolving urban and environmental challenges.
flooding in 2011
Impact and Key Findings
1
The study found that urban growth has tripled runoff rates, rising from 57.79 m³/s pre-development to 173.8 m³/s post-development. This sharp increase in surface water flow underscores escalating flood risks and the need for improved watershed management strategies.
2
The study highlights how rapid development has intensified flood hazards by accelerating surface runoff. These findings underscore the need for targeted flood mitigation strategies that address evolving landscape dynamics and shifting hydrological patterns, ensuring long-term resilience.
3
The study provides cost estimates for implementing nature-based solutions, equipping stakeholders with essential insights to develop sustainable, cost-effective flood management strategies. These findings support informed decision-making to reduce risks and strengthen watershed resilience.
