Three-dimensional hydrogeological and salinity model of the Mekong delta, Vietnam

The data in the file “hydrogeology_Mekong_Vietnam.nc” (in NetCDF – format) contains the 3D voxel model of the hydrogeological units for the unconsolidated sediments in the Mekong delta, Vietnam.

The variable “hydrogeological_unit” represents the aquitards (uppercase), while the lowercase codes denote aquifers. The coding follows the Vietnamese nomenclature and is explained the accompanying paper.

The data in the file “TDS_Mekong_Vietnam.nc” (in NetCDF – format) contains the 3D voxel model of:

• variable called “Etype_estimate_TDS”, representing the average concentration (in g/L) of Total Dissolved Solids (TDS)
• variable called “Probability_TDS_smaller_1g_L”, representing the probability of TDS < 1g/L
• variable called "fresh_brackish_saline" in which each voxel is classified as containing fresh (TDS < 1g/L, code=1), brackish (TDS 1-3 g/L, code=2) or saline (> 3g/L, code=3) groundwater .

for each hydrogeological unit of the “hydrogeology_Mekong_Vietnam.nc file. Only the deepest units (N13 and n13) are not included due to lack of basic data.

The coordinate system is WGS84m - UTM 48 N. The voxel size is 1000 m x 1000 m x 5 m.

The accompanying paper (preprint, by the same authors) can be found at https://doi.org/10.5194/essd-2021-15 and is called "The 3D groundwater salinity distribution and fresh groundwater volumes in the Mekong Delta, Vietnam, inferred from geostatistical analyses"