Researchers from the Karlsruhe Institute of Technology (KIT) in Germany with their fellow Australians have developed a new way , who are now exposed to Geophysics journal, in which groundwater resources can be explored more easily and cost-effectively than in the past.
According to “phys”, as more than 70% of the drinking water comes from underground water in Germany alone, production is increasing very rapidly throughout the world so that groundwater levels are decreasing, quality deteriorates and faces entire cities downwards in groundwater, therefore, it was important to explore the sub-surface characteristics of resource management more sustainably.
“The current testing methods require an active water pump from a specially designed water well with water level monitoring in other wells in the vicinity,” says Dr. Gabriel of the Institute of Applied Geosciences (KW).
Two or three people will need to prepare a pump test and supervise measurements for a long time to do so.
This method is very expensive and can last anywhere from several hours to several months depending on the sub-surface characteristics, and the result is valid only for the site being tested.
The aquifers vary widely in terms of area, and the construction of extraction wells everywhere is very expensive.
Researchers at the Karlsuhe Institute of Technology, in collaboration with the University of New South Wales (UNSW) in Sydney and Deakin University in Melbourne, have developed a new way to assess information on the effects of tides on groundwater levels.
Like the tide in the ocean, the groundwater level is affected by the tidal forces, where the change in gravity leads to pressure on the porous rocks in the ground and causes measurable pressure changes, along with the tides in the atmosphere that change the pressure under the surface periodically.
“We can measure this change at low cost, use less complex procedures, and fewer staff to identify sub-surface characteristics,” says Gabriel.
Engineers do not need special extraction wells for this purpose, but they can put a data log into water pressure at a conventional groundwater point of measurement. The pressure sensor measures the groundwater level regularly for at least a month.
By using measurements, researchers can calculate the physical properties of the bottom layer, compressibility and translate the results into the sustainable use of groundwater resources.