20230920
16081900
1.0
FALSE
150000000
5000
ItemDescription
Erosion_Rates_wm_Dissolve
002
0.000
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20230814
11495500
20230814
11495500
To join the VIMS SSP erosion rates to the CCRM shoreline.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This layer was generated by combining the VIMS Shoreline Studies Erosion Rates from 1937-2009 (Hardaway, Jr. et al. 2020) with the NOAA Coastal Resilience water interface shoreline (allVA_waterinterface_line_noboundaries.shp).
The shoreline layer was first dissolved into a single multipart shoreline, and then split into 10 m segments using the QGIS v3.24 "Split lines by maximum distance" tool. The erosion rate points were then joined to their nearest shoreline segment, with a maximum search distance of 500 m. Shoreline segments greater than 500 m from the nearest erosion rate point were manually assigned a rate of -0.03 m/yr based on work done by Cielomar Rodriguez for her dissertation at VIMS. The 3 cm/year loss will only be valid in small creeks, and should not be used for the Seaside Eastern Shore or any shoreline along larger bodies of water (e.g., the Pamunkey River). The field "EPR_Mtr" is the erosion rate in meters. Segments where fields "n" and "distance" == 0 are where the line segments were more than 500 m from the nearest EPR point, and were therefore assigned a value of -0.03 m/yr.</SPAN></P></DIV></DIV></DIV>
Jessica Hendricks - NOAA Coastal Resilience shoreline layer
Hardaway et al. - Erosion Rates
Robert Isdell - this layer
Erosion Rates on the Shoreline
Erosion
Shoreline
Rates
Esri ArcGIS 13.1.0.41833
20230814
File Geodatabase Feature Class
0.000
dataset
EPSG
6.18.3(9.3.1.2)
0
Simple
FALSE
0
TRUE
FALSE
Erosion_Rates_wm_Dissolve
Feature Class
0
OBJECTID
OBJECTID
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.
Range_FtYr
Range_FtYr
String
25
0
0
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.