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\begin{document}

\title{Utilizing Earth Observations to Delineate Wetland Extent, Model
Sea-Level Rise Inundation Risk, and Assess Impacts on Historic Hawaiian
Lands}



\author[1,2]{Ian R.J. Lee}%
\author[1,2]{Lisa Tanh (lisa.tanh@ssaihq.com)}%
\author[1,2]{Matilda Anokye}%
\author[1,2]{Connor Racette}%
\author[1,2]{Ryan Hammock}%
\author[3]{Roberta Martin}%
\author[3]{Jiwei Li}%
\affil[1]{NASA DEVELOP National Program}%
\affil[2]{Science Systems and Applications, Inc}%
\affil[3]{Arizona State University, Center for Global Discovery and Conservation Science}%


\vspace{-1em}



  
  \date{May 27, 2024}


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\begin{abstract}
Climate induced sea-level rise poses a risk to coastal areas on the
Island of Hawai'i, and many of the island's historic cultural lands are
in danger of becoming overtaken by wetlands or inundation. In
partnership with the County of Hawai'i, State of Hawai'i Department of
Land and Natural Resources, and Arizona State University, NASA DEVELOP
mapped wetland extent and short-term sea-level rise inundation risk. We
utilized Earth observations over a 10-year span (2013 -- 2022) that
included the NASA MEaSUREs Gridded Sea Surface Height Anomalies and
MEaSUREs Group for High Resolution Sea Surface Temperature datasets,
United States Geological Survey (USGS) Hawai'i Digital Elevation Models
(DEM), and~\emph{in-situ} tidal gauge data. Flood risk index values were
acquired for five known Hawai'i flood events between 2019 -- 2021 from
the Global Flood Mapper tool on Google Earth Engine. We used a random
forest model to predict short-term sea-level rise inundation risk along
the entire coast of Hawai'i. Current wetland extents and probabilistic
locations of new wetlands were modeled with the most recently available
data from PlanetScope Surface Reflectance optical imagery (2022), USGS
3D Elevation Program (3DEP) 10m DEM (2013), temperature and
precipitation data from the Hawai'i Climate Atlas, and soils data from
the Hawai'i Soil Atlas (2014) using the Wetland Intrinsic Potential
tool. Results indicated locations that had the highest probability of
wetland creation. The end products aimed to help the partners prioritize
efforts to meeting regulation requirements for wetlands protection,
evaluate the inundation risk to historical features, and support
decision-making for their Shoreline Setback and Climate Adaption plans.%
\end{abstract}%



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