COAST COastal Adaptation to Sea level Rise Tool
Definition
COAST is a decision-support framework designed to assess risks and adaptation strategies related to sea level rise in coastal regions. It integrates elevation, land use, population, and infrastructure data to evaluate exposure under different climate scenarios. The goal is to support long-term resilience planning by comparing adaptation options such as retreat, protection, or accommodation. COAST helps policymakers and planners understand trade-offs and prioritize investments in vulnerable coastal zones.
FAQ
What is the COAST Coastal Adaptation to Sea Level Rise Tool?
COAST is a GIS-based decision-support framework that helps coastal planners and policymakers assess risks and evaluate adaptation strategies related to sea level rise. It integrates spatial data layers including elevation, land use, population, and infrastructure to model exposure across different climate scenarios. The tool supports long-term coastal resilience planning by comparing adaptation options such as managed retreat, shoreline protection, or accommodation.
How is GIS applied within the COAST sea level rise framework?
COAST leverages geospatial analysis to combine digital elevation models (DEMs), land cover datasets, and socioeconomic data into a unified geographic information system environment. These spatial layers are overlaid and analyzed to map inundation zones, identify vulnerable assets, and simulate the impact of various sea level rise projections across coastal regions. The GIS-driven approach allows users to visualize and compare adaptation scenarios through interactive maps and spatial outputs.
What are the practical benefits of using COAST for coastal vulnerability assessment?
COAST enables planners to make data-driven decisions by clearly visualizing which coastal zones face the greatest exposure to flooding, storm surge, and inundation under multiple climate scenarios. By spatially quantifying risks to infrastructure, communities, and ecosystems, the tool helps prioritize investment in the most vulnerable areas. This supports more effective, evidence-based coastal management and climate adaptation planning at local and regional scales.
What are the key technical requirements for implementing the COAST tool in a GIS environment?
Implementing COAST requires high-resolution spatial datasets, including LiDAR-derived digital elevation models, georeferenced land use and land cover data, and accurate infrastructure and population layers aligned to a common coordinate reference system. The framework is typically deployed within a GIS platform capable of raster and vector analysis, scenario modeling, and map-based visualization. Data quality, spatial resolution, and the accuracy of sea level rise projections are critical factors that directly influence the reliability of COAST outputs.
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