This map illustrates the nitrate concentrations in production wells. The contents of this analysis overlays the map of the Northern Guam Lens Aquifer (NGLA).
Last updated in 2021.
Click on one of the tabs below to view a list of shape files or raster files available for you to download.
Basement topography | Elevation contours, meters, Vann, Bendixson, Habana 2018
Basement contours | Select contours 0, -20, -40 meters
Saltwater toe extracted from groundwater model | No pumping, 50% isochlor, Gingerich 2014
Aquifer basins 2021 | Basement and flow line delineation, from Gingerich 2013 model
Water table contours | No pumping condition, from Gingerich 2013 model
NGLA Map 2021 | Basic shapefiles package
Links to these files are currently under construction. Please check again later.
This map shows the plateau basins with their CHamoru names.
Last updated in 2021
See some of the viewing options below #add in desktop view: https://werinch2018.maps.arcgis.com/apps/webappviewer/index.html?id=7f506c88a95747aa8774b0c0d311d7da and mobile view
Click on the icon to view the LiDAR Imagery version of the surface hydrology map.
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