20201201
09241800
1.0
North American Profile of ISO19115 2003
FALSE
slr_cstl_erosn_1_pt_1_ft
418737.285400
775010.768900
2282833.598600
2458276.622400
1
002
Projected
GCS_North_American_1983_HARN
Linear Unit: Meter (1.000000)
NAD_1983_HARN_UTM_Zone_4N
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_HARN_UTM_Zone_4N",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-159.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3750]]</WKT><XOrigin>-5120900</XOrigin><YOrigin>-9998100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102202</WKID><LatestWKID>3750</LatestWKID></ProjectedCoordinateSystem>
20220818
18272400
20220818
18272400
slr_cstl_erosn_1_pt_1_ft
Feature Class
339
OBJECTID
FID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
id
id
Double
8
0
0
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
Charles Fletcher
University of Hawaii Coastal Geology Group (CGG)
Unknown
fletcher@soest.hawaii.edu
20220818
ArcGIS Metadata
1.0
Pacific Islands Ocean Observing System (PacIOOS)
Unknown
info@pacioos.org
None specified
Hawaii Sea Level Rise Viewer
This URL provides a viewer for this dataset.
Hawaii Sea Level Rise Vulnerability and Adaptation Report
This dataset was created in support of the Hawaii Sea Level Rise Vulnerability and Adaptation Report (2017).
http://pacioos.org/shoreline/slr-hawaii/
http://climate.hawaii.gov/wp-content/uploads/2019/02/SLR-Report_Dec2017-with-updated-disclaimer.pdf
File Geodatabase Feature Class
slr_cstl_erosn_1_pt_1_ft
2020-11-30
2.0
University of Hawaii Coastal Geology Group (CGG)
Charles Fletcher
Studies of historical shoreline change using aerial photographs and survey maps show that 70% of beaches on Kauai, Oahu, and Maui are eroding (receding landward) (Fletcher et al. 2012). Beaches exist in a delicate balance between existing water levels, wave energy, and sand supply. Coastal erosion modeling was conducted for sandy shorelines of Kauai, Oahu, and Maui by the University of Hawaii Coastal Geology Group. The methods are described in Anderson et al. (2015) and Anderson et al. (2018), and combine historical shoreline change data with a model of beach profile response to sea level rise from Davidson-Arnott (2005) in order to estimate probabilities of future exposure to erosion at transects (shore-perpendicular measurement locations) spaced approximately 20 meters apart along the shoreline. The model accounts for localized alongshore variability in shoreline change by incorporating trends from the historical erosion mapping studies. Historical data used to model coastal erosion consisted of: (1) historical shoreline positions and erosion rates measured from high-resolution (0.5 meters) ortho-rectified aerial photographs and NOAA topographic charts dating back to the early 1900s (Fletcher et al. 2012, Romine et al. 2013), and (2) beach profile field survey data (Gibbs et al. 2001, Fletcher et al. 2012). The vegetation line was identified in the most recent aerial photography dating from 2006 to 2008. The output of the modeling is the estimated exposure zone to future erosion hazards. Based on the model and IPCC AR5 RCP8.5 sea level rise scenario, there is an 80% probability that land impacted by erosion would be confined within the exposure zone at that particular time. The exposure zones extend landward from the current-day shoreline (vegetation line) up to the 80% cumulative probability contour from sea level rise at 0.5, 1.1, 2.0, and 3.2 feet, which incorporates the uncertainty (upper and lower bounds) of the IPCC RCP8.5 sea level rise projection. This particular layer depicts coastal erosion using the 1.1-ft (0.3224-m) sea level rise scenario. While the RCP8.5 predicts that this scenario would be reached by the year 2050, questions remain around the exact timing of sea level rise and recent observations and projections suggest a sooner arrival. Assumptions and Limitations: Historical shoreline change data and beach profiles needed to model coastal erosion are available only for sandy shores of Kauai, Oahu, and Maui. Exposure was not modeled for less-erodible rocky coasts and bluffs, though the latter can be prone to sudden failure in some areas. In addition, modeling did not account for: (1) existing seawalls or other coastal armoring in the backshore; (2) increasing wave energy across the fringing reef with sea level rise; (3) possible changes in reef accretion and nearshore sediment processes with sea level rise; and (4) possible changes to sediment supply from future shoreline development and engineering, such as construction or removal of coastal armoring or other coastal engineering. Users of these data should cite the following publications: Anderson, T.R., Fletcher, C.H., Barbee, M.M., Romine, B.R., Lemmo, S., and J.M.S. Delevaux (2018). Modeling multiple sea level rise stresses reveals up to twice the land at risk compared to strictly passive flooding methods, Scientific Reports, 8:14484, doi: 10.1038/s41598-018-32658-x. Anderson, T.R., Fletcher, C.H., Barbee, M.M., Frazer, L.N., and B.M. Romine (2015). Doubling of Coastal Erosion Under Rising Sea Level by Mid-Century in Hawaii, Natural Hazards, doi:10.1007/s11069-015-1698-6. For further information, please see the Hawaii Sea Level Rise Vulnerability and Adaptation Report: http://climate.hawaii.gov/wp-content/uploads/2019/02/SLR-Report_Dec2017-with-updated-disclaimer.pdf 2020 Data Update (Version 2.0): Historical shoreline change rates were recalculated for Kauai, Oahu, and Maui with the addition of a new historical shoreline position (ca. 2014-2018, depending on location) to the database of previously existing historical shoreline positions. The erosion models were then recalculated using the updated historical change rates. The addition of the new shoreline generally has a more pronounced influence on study areas with high seasonal or inter-annual variability in shoreline position. In addition to changes in the landward extent of the erosion exposure areas, the seaward edge of updated erosion exposure polygons does not match up with the previous (2017) erosion projections. This is because the seaward edge of the 2017 data is defined by a Special Management Area Shoreline boundary, whereas the seaward edge of the updated 2020 data is defined by the location of a vegetation line (11/2020).
Estimated coastal erosion, modeled using a 1.1 foot sea level rise scenario.
SOEST, UH CGG, PacIOOS
Charles Fletcher
University of Hawaii Coastal Geology Group (CGG)
Unknown
fletcher@soest.hawaii.edu
https://files.hawaii.gov/dbedt/op/gis/data/slr_cstl_erosn_1_pt_1_ft.png
Sample image.
PNG
Continent > North America > United States Of America > Hawaii
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Maui
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Kauai
GCMD Location Keywords
Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Sea Level Rise > Inundation
Earth Science > Oceans > Ocean Waves > Wave Runup
Earth Science > Human Dimensions > Environmental Impacts
Earth Science > Human Dimensions > Natural Hazards > Floods
Earth Science > Coastal Processes > Sea Level Rise
GCMD Science Keywords
Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Sea Level Rise > Inundation
Continent > North America > United States Of America > Hawaii
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Maui
Earth Science > Oceans > Ocean Waves > Wave Runup
Earth Science > Human Dimensions > Environmental Impacts
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu
Earth Science > Human Dimensions > Natural Hazards > Floods
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands
Earth Science > Coastal Processes > Sea Level Rise
Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Kauai
Unknown
Use Limitation: Based on the methodology of sea level rise modeling used in the Hawaii Sea Level Rise Vulnerability and Adaptation Report (Report) and the Hawaii Sea Level Rise Viewer (Viewer), having gone through peer review and publication in the Nature Journal Scientific Reports, the results of this study are sufficiently validated to be appropriately used in land management decisions as the best available information as of the date of publication of the Report, December 2017, consistent with the intent of Act 83 SLH 2014 as amended. This Report is intended to provide a state-wide assessment of Hawaii's vulnerability to sea level rise. The location of projected impacts and economic costs from damages are estimates based on a particular sea level rise scenario. The hazard and vulnerability data and maps provided herein are based on observational data and computer-based models as described in the Report and in published research (Anderson et al., 2018). As with all models, it is important to understand the methods, assumptions, limitations, and uncertainties of the methods used. The risks associated with use or non-use of the results are assumed by the user.
-159.787398050649
-156.355714813619
20.6258225521747
22.2292233069547
Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
1
-159.788519
-156.332489
22.229923
20.624597
dataset
EPSG
6.13(10.0.0)
339
Simple
FALSE
339
TRUE
FALSE