Geophysical logging of boreholes prior to the installation of piezometers permits a cost effective means of evaluating hydrogeological conditions, and aids in the optimum design of piezometers and groundwater monitoring boreholes. Fluid logging of monitoring boreholes aids in the selection of sampling depths and is a means of monitoring water quality and movement.
Checks of the completed piezometer and borehole construction can also be made using geophysical logging techniques and downhole video cameras to ensure correct installation of screen, linings, gravel pack, and bentonite or grout seals.
The water quality log (below) shows a high nitrate water in flow/crossflow in an exploration borehole. The high level of dissolved oxygen would suggest that this water originated from near to the surface.
The caliper log shows a large fissure corresponding with the nitrate and oxygen highs, which would indicate that this broken section of formation is the source of the nitrate. The results of the logging allowed the production borehole construction to be optimised so that this fractured formation, producing high nitrate surface water, could be cased out ensuring only water with a much lower nitrate content was produced.
We are using cookies to give you the best experience on our website.
You can find out more about which cookies we are using or switch them off in settings.
This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.
You can adjust all of your cookie settings by navigating the tabs on the left hand side.
Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings.
If you disable this cookie, we will not be able to save your preferences. This means that every time you visit this website you will need to enable or disable cookies again.
This website uses Google Analytics to collect anonymous information such as the number of visitors to the site, and the most popular pages.
Keeping this cookie enabled helps us to improve our website.