Before drilling a well, you need to make sure there is water at depth; otherwise, the effort will be wasted.
There are several basic methods for finding water underground.
This method allows to find out about the composition of rocks and the nature of the location of the layers, and the structural composition.
Geological maps are available in the archives of specialized regional organizations. Carrying out these works requires drilling exploration wells and pits at the site of the planned construction of wells.
Low-frequency AC-current is used in vertical electrical sounding. Voltage is applied to the electrodes spaced across the area; water is determined by the drop in resistivity in the rock. This method helps to find out the depth of occurrence and the approximate structure of water-bearing deposits.
Disadvantages of the method: there is a possibility of calculation errors in the presence of a bank of iron ore in the soil. This method cannot provide data on the volume of water underground.
Upon impact on the ground, the device receives response damped oscillatory signals, which are then interpreted by the program. Seismic exploration allows you to get a map of the subsoil's structure to determine voids and inhomogeneities and indicate the water level. When acoustic waves pass through liquids with a high density, a change in the direction of high frequencies occurs on the device.