What data is collected?
Groundwater quantity is measured in terms of:
- bore water level (AHD)
- depth below measurement point
- depth below natural surface
Measurements may be made daily, quarterly or as part of occasional project monitoring.
Understanding groundwater parameters
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The elevation of groundwater in relation to sea level, Australian Height Datum (AHD). Bore water level (AHD) is measured in metres.
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Depth below natural surface or hydraulic head, is the height to which water will rise in a bore. It is the resting groundwater level, measured from the top of the ground surface to the groundwater level in the bore. Positive values are below the ground surface. Negative values are above the ground surface and indicate artesian conditions. Depth below natural surface is measured in metres.
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Depth below measurement point is one of the bore measurements used in calculating water level relative to surface and sea level. It is the distance between the reference point (often top of bore casing) to the opening of the bore in the aquifer of interest, or depth of sensor. Depth below measurement point is measured in metres.
Reviewed 08 July 2024