The global in-stream water age
Description
The in-stream water age datasets correspond to the recent high-quality global river hydrography dataset named GRADES [Lin. et al. 2019] by sharing "COMID". The shapefiles are publically assessible (link: 'http://hydrology.princeton.edu/data/mpan/GRADES/' and 'http://hydrology.princeton.edu/data/mpan/MERIT_Basins/').
The water age datasets cover 8 continents/sub-continents, where the number represents the level 1 Pfafstetter code from HydroSHEDS/HydroBASINS: 1: Africa, 2: Europe, 3: North Asia, 4: South Asia, 5: Oceania and South Asian Islands, 6: South America, 7: North America, 8: Arctic Region.
The first colum is COMID inherited from GRADES, the second column ('Age_nat') is the water age in natural status, and the third column ('Age_dam') is the water age in dammed status, all water ages are in unit of days.
Reference:
Lin, P. et al., 2019. Global Reconstruction of Naturalized River Flows at 2.94 Million Reaches. Water Resources Research 55(8), 6499-6516. https://doi.org/10.1029/2019wr025287.
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