CULVERT-v01: An Open-Source Web Application for Assessing Culvert Vulnerability to Floods and Flood induced Erosion

CULVERT enables practitioners to evaluate culvert vulnerability to flooding, sedimentation, and debris flowhazards. The platform incorporates advanced watershed delineation using digital elevation models, multi-methodhydrologic analysis—including non-stationary regional frequency analysis, rational method, and graphical peakdischarge estimation—and hydraulic capacity assessment based on Federal Highway Administration guidelines.Additional modules support streambank erosion vulnerability analysis, Revised Universal Soil Loss Equation(RUSLE) implementation, and watershed debris flow modeling.CULVERT features a fully dynamic and interactive visualization interface, automated technical reporting, androbust data management capabilities. By integrating diverse analytical tools within a user-friendly environment,the platform provides resource managers, transportation engineers, and environmental professionals with ascientifically grounded decision-support system for assessing and mitigating infrastructure vulnerabilities underevolving climate conditions. The application is publicly accessible at https://culvert-at-risk.org, and the sourcecode is available via GitHub to promote transparency and reproducibility.