Is there a global database available for groundwater basins (Aquifers), similar to gdbd for surface water?
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2Though it is not open data, there is a global groundwater data set maintained by the German Federal Institute for Geosciences and Natural Resources (BGR). – nathansnider Apr 18 '16 at 22:01
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How do you define "groundwater"? Is that the same as an aquifer? Or are you referring to surface water? – Bulrush Apr 19 '16 at 10:42
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I currently use WHYMAP: whymap.org/whymap/EN/Home/whymap_node.html – user26631 May 18 '16 at 14:34
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I don't believe these are 100% on target, but they look pretty promising.
Freshwater Ecoregions of the World (Data Basin Dataset)
Food and Agriculture Organization's AQUASTAT database
I can't post more than two links yet, but the USGS has a pretty solid database for all bodies of water in the United States, so make sure to check them out for US based data, at least.
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Global Water Forum lists a number of water related tools and resources, including datasets. A couple of these may be of use to you:
http://www.globalwaterforum.org/resources/data/
One in particular, the GGIS (Global Groundwater Information System):
http://www.un-igrac.org/global-groundwater-information-system-ggis
USGS Surfacewater Portal also has a number of tools and resources that you may find beneficial:
http://water.usgs.gov/osw/
NASA's GRACE Groundwater combines two major databases, again should also be very relevant here:
http://disc.sci.gsfc.nasa.gov/hydrology/additional/science-focus/grace_groundwater.shtml
