Due to the very high groundwater fluctuations and despite the lack of space, a sealed ground water lake with a high water table was built.

Both mechanisms are incorporated in a groundwater flow model that enables the simulation of tidal and wave-induced groundwater fluctuations.

Unlike most eruptions and earthquakes, these gave no time to study precursory phenomena such as foreshocks, groundwater fluctuations and changes in the behavior of domestic and wild animals.

Using groundwater fluctuations in observation wells, it was found that the values of the specific yield of till range from 0.03 to 0.04 and the specific yield of shale is equal to 0.04.

First, a fast response of groundwater fluctuations to rainfall was observed on the bar, which suggests that the hydrology of the bar is little influenced by contributions from neighbouring bars or from the Precambrian basement situated upgradient.