WATER LEAKAGE ASSESSMENT FROM GEOLOGICAL FORMATIONS AT THE LOCATION OF BADOVC DAM - KOSOVO

This study aims to assess the opportunity of water leakage from Badovc Lake through geological formations where Badovc dam is built. Badovc dam is built in 1965, representing an embankment Rockfill with inclined core dam placed on impervious foundation, and being 45 m high. Dam is mainly constructed on a serpentinite basement which is plenty of cracks and fissures filled with kalcedon, opal, carbonates and clays. A tectonic zone dipping just vertically is developed beneath the dam. In 2015, two boreholes were drilled in a depth up to 20 m under the dam basement which showed that rocks are cracked and tectonised, and a high level of underground water. Lake hydrological monitoring conducted during the year 2014 and January-June (2015) shows a lack at the water balance of 3,738,905 m³ and 1,885,716 m3 respectively. The appearance of water leaks on the right side of the Badovc dam provides indicators for water leakage through geological formations where the dam is built. The chemical data of several hydrological water components of the Badovc watershed were confronted showing that most of sampled waters are linked with water of the lake.