Reliable on-ground information on groundwater (GW) hydraulic heterogeneity is required to determine flow direction and quantities, but its experimental characterization is difficult because of the complexities associated with the interaction involving the temporal changes in space modified by regolith stratigraphy. The impact of the aforementioned variables, particularly stratigraphy in a 51 m thick highly weathered basaltic regolith in the northeast humid tropics of Queensland, Australia, on flow gradients and directions was investigated in this study. Regolith cores at 1 m increments indicated that there were 3 different major strata. The temporal changes in water table, hydraulic- and pressure- heads, and solute concentrations in space indicated the top 51 m aquifer was contiguous, dynamic and hydraulically differentiated into three segments which approximately corresponded with the regolith strata. The lateralflow and solute transport from each aquifer segment was controlled by depth to water table, the number of regolith layers the segment covered, and the solute concentration.
Visualising Victoria’s Groundwater (VVG) is an interoperative web-GIS maintained by Federation University Australia that federates groundwater data from disparate sources to assist groundwater researchers and help water managers make the correct choices for the sustainable use of a precious resource. The Visualising Victoria's Groundwater web-portal currently displays data for all of Victoria from the following sources: • Department of Environment, Land, Water and Planning (DELWP) • Water Measurement Information System (WMIS) - formerly GMS • Victorian Aquifer Framework (VAF) • Department of Economic Development, Jobs, Transport and Resources (EcoDev) • Seamless Geology • Geological Exploration and Development Information System (GEDIS) • Salinity bore database from Future Farming Systems Research (FFSR) • Federation University Australia (FedUni) • Groundwater research bores and other bores not recorded elsewhere (UB Spatial/FedUni Spatial) • Victorian Mineral Water Committee (VMWC) • Victorian Mineral Springs database (VMSD) • Environmental Protection Authority Victoria (EPA) • Certificates and statements of environmental audit (EPA audit reports) • Groundwater quality restricted use zones (GQRUZs) in Victoria • Priority Sites Register (PSR) for Victoria The quality of the bore data varies greatly. Note that bore records may be duplicated in the databases or between the databases, the locations may be wrong, data may be missing and sometimes data may be wrong. For this reason, the emphasis in the data collection has been to refer each record to its original source and link to the original source material where available. Over time it is proposed to edit each individual bore in the database to verify and clean the data where possible. As a general rule, bores in the State Observation Bore network (SOBN) within the WMIS, groundwater research bores managed by the University and the Mineral Springs have the most complete and accurate data. Key features of the VVG portal are: