Minimum Depth to Groundwater for Coastal Alameda County

NOTE: The authors believe that this dataset is likely to be LESS accurate
than using a clip of the larger San Francisco Bay groundwater dataset,
here: https://dash.berkeley.edu/stash/dataset/doi:10.6078/D1W01Q. The
reason is that additional datapoints and editing were used to improve the
San Francisco Bay groundwater map after this Alameda County map was
produced. We expect that the most recent San Francisco Bay map is the most
accurate, even for smaller geographic scales. This dataset contains a
comparison of four interpolation methods used to estimate a minimum depth
to groundwater surface for Alameda County, within one kilometer/0.6 mi of
San Francisco Bay. The interpolation is based on well data from the CA
State Water Board GAMA GeoTracker database, and the depth to water was
calculated using a 2m USGS Digital Elevation Model.