Baet Alwadi cavern, located in the central part of the coastal chain, at40km.to the east of Tartous city, with its geoKarstic diversity, is the most important Karst phenomena in the coastal area. It represents a complex geological structure, affected
by clear faults, which are the main reasons of its development. Lithologicaly, it belong to the alpian age, constituted of limestone and dolo-limestone tinged with clay, associated to basalt sills, which cross it. The cavern morphology indicates a complex shapes within the carbonate rocks, taking the direction North-South. An underground river passes through the cavern, in addition to a ground and underground flowing, due to the rainfall water precipitation indicated by the occurred springs in the region as Al Saouda spring. The cavern is a typical karstic integrated model, showing the most karst phenomena. This study allowed, using modern techniques and software, the development of a three-dimensional model, and consequentially a numerical model permitting a clear and precise classification of the caverns, in Syria and others countries.
This study includes laboratory measurements using different models in
order to determine the effect of wall-phenomenon on the electrical resistivity
measurements, and field applications. This phenomenon had been studied in
the case of homogeneous
medium of which the resistivity is constant, and in the
case of unhomogeneous medium, composed of two or three different layers. It is
found that the effect of this phenomenon is the same although the medium
resistivity is different or with the increase of the number of layers. This
phenomenon changes according to the measurements conditions such as the
measurements direction concerning the edge of slope or wall, the distance
between AB electrodes, and the distance between the configuration and the
wall.
