In this 3DS Blog article, Dassault Systèmes makes the case that flood risk is now a multidimensional challenge for cities globally, driven by climate change, urban expansion, and aging infrastructure. According to the article, floods account for up to 35–40% of weather-related disasters, with direct economic losses exceeding US$200 billion annually.
The core proposition is urban “virtual twins,” high-fidelity digital replicas of city systems including terrain, built environment, drainage networks, weather, and stormwater sensors. These models ingest real-time and historical data to simulate flood events, evaluate mitigation strategies and support emergency response. The blog explains that existing methods (static maps, historical data) struggle to capture the fast-moving, complex behaviors of flood events in modern urban settings.
Several use-cases are described: advanced scenario modeling of rainfall, surface runoff, interaction with built-infrastructure; early warning systems that feed into city control centers; and “what-if” simulations to test infrastructure upgrades (drains, retention basins, green infrastructure) before committing capital. The article argues that virtual twins help shift flood management from reactive responses to proactive resilience planning.
The write-up highlights key advantages: reduced uncertainty in planning, greater stakeholder alignment through immersive 3D visualizations, improved cost-benefit decisions for urban infrastructure investment, and enhanced cross-agency coordination (urban planners, engineers, emergency services). At the same time, it acknowledges hurdles: data integration across silos, real-time sensor network deployment, computational demand for large-scale simulation, and the need for skilled personnel to interpret outcomes.
Virtual twins represent the convergence of GIS/mapping, IoT sensor networks, hydrodynamic modeling, cloud computing, and immersive visualization. They offer a strategic tool for cities looking to meet rising flood risk, tightening budget constraints and growing demands for resilient infrastructure. The article closes by positioning virtual twins not as a luxury but as a necessary evolution for 21st century urban flood management.