Data name: 
wtd
Data Category: 
hydrology
Data Type: 
raster
Data Format: 
nc
Data Keywords: 
GROUNDWATER
WATER
Data Path: 
hydrology/wtd/data/netcdf
Data Last Access: 
Friday, 17 April, 2020
Data JRC Contact Info: 
cesar.carmona-moreno@ec.europa.eu
Data Credits: 
References: 1. Fan, Y., H. Li, G. Miguez-Macho (2013) Global patterns of groundwater table depth, Science, 339 (6122): 940-943, doi:10.1126/science.1229881 2. P. Döll, K. Fiedler (2008), Global-scale modeling of groundwater recharge. Hydrol. Earth Syst. Sci. 12, 863 (2008). doi:10.5194/hess-12-863-2008 3. Fan, Y., G. Miguez-Macho, E.G. Jobbágy, R.B. Jackson, C. Otero-Casal (2017) Hydrologic regulation of plant rooting depth, Proceedings of the National Academy of Sciences of the United States of America, Vol 114, No 40, 10572–10577, doi: 10.1073/pnas.1712381114.
Data Availability: 
FREE
Data Use Limitations: 
These data can be used freely for research purposes provided that the following source is acknowledged: Fan Y, Miguez-Macho G, Jobbágy EG, Jackson RB, Otero-Casal C (2017): Hydrologic regulation of plant rooting depth, Proceedings of the National Academy of Sciences 114 (40), 10572-10577, doi: 10.1073/pnas.1712381114. These data are made available in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
Data Spatial Resolution Description: 
About 1 km (at Equator)
Data Spatial Resolution Degree: 
0.0083333300
Data temporal frequency: 
static
Data Resource Last Download : 
Friday, 17 April, 2020
Data Spatial Extent: 
Data Region of Interest: 
World
Data Short Description: 
Global patterns of groundwater table depth (WTD)
Data Extended Description: 
Shallow groundwater affects terrestrial ecosystems by sustaining river base-flow and root-zone soil water in the absence of rain, but little is known about the global patterns of water table depth and where it provides vital support for land ecosystems. We present global observations of water table depth compiled from government archives and literature, and fill in data gaps and infer patterns and processes using a groundwater model forced by modern climate, terrain, and sea level. Patterns in water table depth explain patterns in wetlands at the global scale and vegetation gradients at regional and local scales. Overall, shallow groundwater influences 22 to 32% of global land area, including ~15% as groundwater-fed surface water features and 7 to 17% with the water table or its capillary fringe within plant rooting depths. The authors,given the continued downloads and applications of our earlier model estimates of the global patterns in groundwater table depth, make available to the readers their recently revised estimates, and suggest that future applications use this new dataset, which is substantially different from the earlier estimates. Please see url written the SOURCE field to download the new dataset and the second url in the URL field pointing to a letter describing the new updates by the authors.