The 5-degree inclination of pipe is highly recommended because it provides higher hydraulic head and lower piezometric surface elevations at the back of the drains.
The inclination of the pipe from the horizontal is recommended because it provides higher hydraulic head and lower piezometric surface elevations at the back of the drains.
An analog exists for confined aquifers and is called the potentiometric surface (or piezometric surface
Kohtla and Tammiku mines were typical shallow mines in the central part of the lowering of the piezometric surface
. The proportion of precipitation in mine water was about 80%.
Since increased recharge to the deep aquifer, and the consequent rise in its piezometric surface, is the principal cause of the salinity problem in south-western Australia, the model will require a layer representing this aquifer in addition to one representing the soil layer.
Comparison of the predicted occurrence of seepage from the bottom layer with the present piezometric surface and its rate of change (Clarke et al.
The piezometric surface
(groundwater table) of the Galena Aquifer is intersected by the stream in this reach, and groundwater discharges into the stream from the bedrock units (Libra et al.
They also suggested that this may increase to 10-16 mm, or 16-27% of the recharge, depending on potential changes to the piezometric surface
in the future and treatments installed in the catchments.
Future studies should include determining piezometric surfaces
for the Douglas Lake landscape, better characterization of groundwater using stable isotopes, and more accurately determining flowpaths through radon analyses.