New Grid: Principal Aquifers of the U.S.

[rebeccasomerville]

Here is a submission for a geofacet grid of US principal aquifers. A principal aquifer is defined as a regionally extensive aquifer or aquifer system that has the potential to be used as a source of potable (drinkable) water. For study or mapping purposes, aquifers are often combined into aquifer systems (Link to USGS definition of principal aquifer). The reference image is Figure 1 from "Predictions of groundwater PFAS occurrence at drinking water supply depths in the United States". An example of data is attached to create pie charts from a data source that is about to be released at this doi.

example_geofacet_name_xwalk.csv
example_geofacet_data.csv

Grid data:

name,code,row,col
Columbia Plateau basaltic-rock,7,1,2
Columbia Plateau basin-fill,8,1,1
Glacial and New England Crystalline Rock,23,1,8
Glacial,24,1,4
Mississippian,12,2,6
Pacific Northwest basaltic-rock,14,2,1
Pacific Northwest basin-fill,15,2,2
Valley and Ridge carbonate-rock,21,2,7
Basin and Range carbonate-rock,2,3,2
Central Valley,5,3,1
High Plains,10,3,4
Piedmont and Blue Ridge carbonate-rock,16,3,7
Alluvial,22,3,6
Basin and Range basin-fill,1,4,2
California Coastal Basin,4,4,1
Edwards-Trinity,9,4,4
Mississippi Embayment,11,4,5
Northern Atlantic Coastal Plain,13,4,7
Rio Grande,17,4,3
Southeastern Coastal Plain,18,5,6
Surficial,19,5,7
Texas Coastal Uplands,20,5,4
Biscayne,3,6,7
Coastal Lowlands,6,6,4