Table 1 Attributes and corresponding descriptor variables hypothesized to be associated with the presence (+) or absence (−) of hard armoring.
From: Socioeconomic and environmental predictors of estuarine shoreline hard armoring
Attribute and Source | Descriptor Variable | Relationship Hypothesis | Description (methodology used for evaluation) |
|---|---|---|---|
Distance to Shoreline43 | Distance to Shoreline (m) | − | Shortest distance from the centroid of the parcel area to the shoreline polyline |
Elevation (m) | − | Mean elevation of parcel area relative to the North American Vertical Datum of 1988 (NAVD88) | |
Slope | Elevation/Distance To Shoreline | + | Ratio of elevation to distance (each defined above) |
Parcel Area (CRC of Georgia) | Parcel Area (km2) | + | Upland area of the parcel |
Shoreline Energy Class43 | Indicators for Low, Medium, and High Energy | + | Classification of shoreline energy based on shoreline type from the NWI classification |
Shoreline Change58* | Minimum Historical Shoreline Change Rate (m/year) | − | Minimum value of the shoreline change rate transects that overlap with the original CAMA parcel boundary |
Average Historical Shoreline Change Rate (m/year) | − | Average value of the shoreline change rate transects that overlap with the original CAMA parcel boundary | |
Maximum Historical Shoreline Change Rate (m/year) | − | Maximum value of the shoreline change rate transects that overlap with the original CAMA parcel boundary | |
Erosion Rate (m/year) | + | Absolute value of the average historical shoreline change rate descriptor variable for values <0 | |
Accretion Rate (m/year) | − | Value of the average historical shoreline change rate descriptor variable for values >0 | |
Neighbor Armoring (binary) | + | Denotes if a parcel adjoins another parcel that has hard armoring (1) or not (0) | |
Distance to Closest Armored Neighbor (m) | − | Distance from the centroid of a parcel area to the centroid of the closest armored parcel area, other than the parcel itself | |
Parcel Value (CRC of Georgia) | Replacement Cost ($) | + | Replacement cost for buildings on parcel |
Construction Cost ($) | + | Construction cost for buildings on parcel | |
Building Area (m2) | + | Area of buildings on parcel | |
Total Value ($) | + | Total value of parcel | |
Urban Classification59 | Housing Unit Density at the Block Scale (hu/km2) | + | Housing unit count for the block in which a parcel is located, divided by the area (m2) of that block as given in the census data |
Population Density at the Block Scale (ppl/km2) | + | Population count for the block in which a parcel is located, divided by the area (m2) of that block as given in the census data | |
Housing Unit Density at the Block Group Scale (hu/km2) | + | Housing unit count for the block group in which a parcel is located, divided by the area (m2) of that block group as given in the census data | |
Population Density at the Block Group Scale (ppl/km2) | + | Population count for the block group in which a parcel is located, divided by the area (m2) of that block group as given in the census data |
