Groundwater and surface water sample locations included in hydrochemical cluster analysis

Abstract

Dataset combines multiple parameters measured in groundwater and surface water samples and interpreted using Hierarchical Cluster Analysis. This dataset combines groundwater and surface water hydrochemical (major ions, EC, TDS) sourced from GA datasets that were originally sourced from the NT government database and other sources listed under column 'Source'.

Attribution

Geological and Bioregional Assessment Program

History

A hydrochemical dataset composed of 857 groundwater samples and 21 surface water samples was used for Hierarchical Cluster Analysis to investigate inter-aquifer and GW-SW connectivity. Groundwater samples are assigned to the following hydrostratigraphic units: Antrim Plateau Volcanics/Helen Springs/Jindare, Bukalara, Cenozoic, Cretaceous, Jinduckin/AnthonyLagoon/HookerCreek; Proterozoic and Tindall/GumRidge/Montejinni. Variables used for the analysis included major ions (Ca, Mg, Na, K, HCO3, Cl, SO4), electrical conductivity (EC) and pH with data normalised for statistical calculation. Datapoints with charge balance error above 10% have been removed prior to interpretation. The interpretation resulted in five clusters with distinct geochemical properties, as described in the respective section of the technical report Hydrogeology of the Beetaloo GBA region. Check column source to identify data origin with references in the above mentioned report.