A dynamic dendritic connectivity assessment tool for the planning and design of barrier mitigation strategies in river networks

Abstract Context Increasing fragmentation of rivers caused by barriers continues to impact watersheds, especially disruption fish migration patterns and loss access spawning nursery habitats. Infrastructure expansion ageing installations exacerbate the problem, reducing effectiveness management in addressing barriers. Reduction watershed connectivity requires effective tools capable guiding river managers remediation actions. Objectives Our objective was develop a dynamic assessment tool (D-CAT), customizable geospatial analyses at varying scales. The uses proven modelling combined with an evaluation approach provide measurable change model outcomes. Methods Three different barrier encounter scenarios were examined using D-CAT study connectivity. tested on area River Derwent, major tributary Trent system United Kingdom. Results For each scenario tested, indicated which could be removed or modified greatest improvement. provided prioritized list for under choices number remove, demonstrating utility planning design. Conclusions is built handle geographical data variable user input, allowing in-depth analysis. forecasts cumulative effects alternative connectivity, providing prioritization optimization removal strategies. offers significant support landscape towards better removal/remediation decisions.