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definition | The areas below the ground where void spaces are filled with a mixture of water under pressure less than atmospheric which includes water held by capillarity and air (gases) under atmospheric pressure. |
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definition | The groundwater surface in an unconfined aquifer or confining bed at which the pore pressure is atmospheric. It can be measured by installing shallow wells extending a few metres into the saturated zone and then determining the water level in those wells. |
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definition | Describes ecosystems in terms of their 'potential to be interacting with groundwater'.
The classes mapped in the GDE Atlas are: • High potential for groundwater interaction • Moderate potential for groundwater interaction • Low potential for groundwater interaction The term 'potential' is used to reflect the uncertainty inherent in identifying ecosystems as groundwater-dependant using desktop methods. Finer scale studies or fieldwork are needed to confirm this analysis. |
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definition | Landsat Thematic Mapper 5 – a medium resolution satellite image sensor obtained twice monthly over Australia. Data can be obtained from United States Geological Survey. |
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definition | MODerate resolution Imaging Spectrometer – a sensor mounted on NASA’s TERRA and AQUA satellites that orbits the Earth collecting data in visible and infrared wavelengths. The data used in this project was the MOD43B4 Nadir BRDF (NBAR) product disseminated by NASA and post-processed by CSIRO. |
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definition | An underground layer of saturated rock, sand or gravel that absorbs water and allows it to pass freely through pore spaces. |
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definition | The component of streamflow supplied by groundwater discharge. |
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definition | The zone of soil moisture above the watertable where water is drawn upwards by capillary tension in which the water is at less than atmospheric pressure. |
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definition | Documentation of a conceptual understanding of the location of GDEs and interaction between ecosystems and groundwater. |
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definition | An aquifer overlain by a confining bed. The confining bed has a significantly lower hydraulic conductivity than the aquifer. Typically, groundwater in a confined aquifer is under pressure significantly greater than atmospheric pressure. |