CoastWise is an interactive flood simulation platform built with Streamlit and PySWMM that brings real-world stormwater modeling into the hands of students, educators, and community members. The tool allows users to simulate urban coastal flooding by combining design storm rainfall with tide inputs. Users can explore how the timing between rainfall and high tide affects runoff, pipe capacity, and localized flooding, making it an excellent resource for understanding the complexities of coastal watershed management.

With CoastWise, users can test the effectiveness of tide gates, allocate budgets across green infrastructure options like rain gardens and rain barrels, and observe how different choices impact overall flood risk. Each scenario provides real-time feedback through dynamic plots, cost summaries, and subcatchment-level runoff data, encouraging iterative decision-making and critical thinking.

Designed for both classrooms and community outreach, CoastWise supports hands-on learning aligned with environmental science, engineering, and climate resilience topics. The tool is fully accessible, anyone can sign up, log in, and begin designing and testing their own scenarios, making coastal flood modeling approachable and engaging for a broad audience.