Hawaii Sea Level Rise Depth Grid (2000-2150)

This layer of Hawaii Sea Level Rise (SLR) depth grids is constructed using datasets from the NOAA Sea Level Rise viewer and the comprehensive 2022 Interagency Sea Level Rise report. The resulting depth grids represent a robust time series dataset, structured in 10-year increments spanning the years 2000 to 2150, and encompassing five distinct SLR scenarios (Low, Intermediate-Low, Intermediate, Intermediate-High, and High). Dataset Summary Phenomenon Mapped: Sea Level Rise Depth Geographic Extent: Hawaiian Islands Projection: WGS84 Cell Size: ~3 meters Pixel Depth: 32-bit Floating Point Units: Feet Source: NOAA and Esri Data Vintage: September 2025 Publication Date: September 2025 A key focus of this work is the emphasis on data-driven decision-making for coastal resilience. The depth grids offer high-resolution spatial and temporal insights, enabling nuanced analysis of potential inundation patterns under varying future sea level projections. By integrating authoritative sources, the dataset supports consistency and reliability in projecting localized impacts across the Hawaiian Islands. The data utilized to create this layer includes: * NOAA Sea Level Rise Digital Elevation Models (DEMs) for Hawaii. [1] * 2022 Interagency Sea Level Rise Report Gridded Projections. [2] * Hawaii Vertical Datum Transformation. [3] The five scenarios, each reflecting different emission trajectories and ice sheet responses, provide a spectrum of plausible futures. This breadth allows planners, stakeholders, and researchers to identify vulnerabilities and prioritize interventions under conditions of uncertainty. The temporal granularity—10-year increments—facilitates the tracking of near- and long-term shoreline changes, critical for adaptive management and iterative planning. These SLR depth grids serve as a foundational resource for coastal resiliency planning, assessment of infrastructure and habitat risk, and the strategic allocation of mitigation resources. Planners can pinpoint areas at greatest risk, model future exposure, and inform community engagement and policy development. The dataset’s versatility also extends to academic research, scenario analysis, and outreach efforts. The Hawaii Sea Level Rise depth grids, built upon the latest NOAA and interagency findings, provide an essential tool for risk identification and proactive planning in the face of rising seas. Their time series format, scenario diversity, and applicability across disciplines underscore their value in supporting informed, resilient coastal futures for Hawaii. *Note - Areas that are disconnected from the ocean/sea may not experience sea level rise impacts. The bath-tub nature of this analysis shows disconnected areas that are below sea level being impacted by sea level rise. Data Credits: 1. NOAA Office of Coastal Management (OCM). William Brooks and Doug Marcy 2. US EPA, US Department of Homeland Security, FEMA, NASA, NOAA, US Army Corps of Engineers, US Department of Defense, and USGS. ([More Info]) 3. NOAA OCM and University of Hawaiʻi Collaboration - Tidal Constituents and Residual Interpolation (TCARI) method. What can you do with this layer? This layer can be used to identify predicted sea level rise inundation in the Hawaiian Islands. The imagery layer can be used in spatial analysis to intersect roads, parcels, buildings and other infrastructer at risk from sea level rise. Questions? Please leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.