Groundwater and rivers are often connected, and groundwater can sustain river flow during periods without rainfall. Groundwater pumping can also reduce river flow. However, predicting how pumping will affect rivers requires a detailed understanding of the nature of the connection between the river and the groundwater system. NCGRT researchers have been working in Australia and internationally to understand the connection between surface water bodies and groundwater systems. This includes studies of groundwater recharge from ephemeral rivers in central Australia, factors governing flow duration in intermittent streams in South Australia and understanding the sources of groundwater flowing into perennial rivers across eastern Australia.

Our researchers have expertise in measurement and modelling of the interaction between groundwater and rivers. We have expertise in measurement and interpretation of geochemical and isotopic tracers for quantifying the flow of groundwater to rivers, and the leakage of rivers into the underlying groundwater. We also have expertise in using temperature and geophysical methods for identifying hotspots of surface water – groundwater interaction. NCGRT researchers had been at the forefront of modelling the interaction between groundwater and surface water bodies (lakes, rivers, and the ocean), and modelling the link between climate and river flows, particularly for ephemeral and intermittent streams. We also have expertise in understanding legal frameworks and impediments to conjunctive surface water – groundwater interaction, and expertise in policy development and analysis.

Selected Publications