Assessment of the Subsidence in Internal Maliqi Depression using Geophysical Methods

This study have covered the former Maliqi Swamp which of point view consists of the Quaternary overburden formations (Q1-4) and the Upper Neogene, concretely not differentiated Pliocene and Pliocene-Quaternary (N2-Q1) formations The main objectives (intention) are: - Investigation of the subsidence phenomenon, which may lead to the gradual formation of the Maliqi Swamp. - Locating on eventual second turf layer under the known one and its control with integrated methods. - The monitoring of the subsidence phenomenon To achieve a good result for above the objectives there have been used geodesics, geological and geophysical (VES) methods. The integrated interpretation of geodesic and geogolical-gephysical date allowed drawing the following main conclusion: - VES do not indicate the presence (at least up to70-80m) of e second turf layer; this is not a definitive conclusion. This conclusion can be verified by drilling up two holes 50m deep. - The youngest formations (swampy ones) are about 30-35m thick and composed of two fine grained argillaceous layers and two sandy-argillaceous layers. - The Maliqi Depression has been constantly having subsidence, at least since the swamp started to get dried out. In the period 1952-1977 the monitoring showed a vertical dipping from 0.5-3m