Understanding subsurface heat transport processes is important for geothermal energy development and heat-flow modelling applications, and for resolving hydrogeological, biogeochemical and microbiological processes. Studies of subsurface thermal regimes have predominantly focussed on repeat temperature-depth profile analysis. The application of groundwater temperature time-series data to characterise thermal and hydraulic proc...

Hydraulic properties of coastal, urban aquifers vary spatially and temporally with the complex dynamics of their hydrogeology and the heterogeneity of ocean-influenced hydraulic processes. Traditional aquifer characterisation methods are expensive, time-consuming and represent a snapshot in time. Tidal subsurface analysis (TSA) can passively characterise subsurface processes and establish hydro-geomechanical properties from gr...

There is a scarcity of long-term groundwater hydrographs from sub-Saharan Africa to investigate groundwater sustainability, processes and controls. This paper presents an analysis of 21 hydrographs from semi-arid South Africa. Hydrographs from 1980 to 2000 were converted to standardised groundwater level indices and rationalised into four types (C1–C4) using hierarchical cluster analysis. Mean hydrographs for each type were cr...