Hydrogeology of Bursa Dümbüldek thermal water

This study has been prepared as Master of Science thesis to clarify geological and hydrogeological characteristics of Bursa Dümbüldek Thermal Water in Applied Geology Engineering Department of the Institute of Science and Technology of Istanbul Technical University. The study area is in the south region of Bursa. In this study, a hydrogeological investigation has been performed for Bursa Dümbüldek Thermal Water and surrounding region. In this study, it has been investigated as detailed geological, hydrological and hydrogeological features of Dümbüldek Termal Water. During the field study, 1/25000 scaled geological map of the region has been revised. The study area and its surroundings are composed of Mesozoic and Cenozoic units. The units from older to younger are Triassic Orhanlar Greywacke including Permian Limestone blocks, Oligocene Cataldağ Granite, Miocene Göbel formation and Mudamköy volcanics contemporaneous with this formation, Pliocene lake sediments and Quaternary alluvium and slope rubbles unconformably overlying over all these units. Hydrogeochemical map was constructed by using the results of chemical analysis. According to the chemical analysis results Wilcox, USA Salinity Laboratory, Piper and Schoeller Diyagram has been used and classified. Classifications are specified according to IAH, hereunder types of hot and mineral waters are Na-Ca-HCO3 type and types of cold waters are generally CaHCO3 type. According to Piper Diagram hot waters are ranked as Na+K type bicarbonate water, mineral waters are ranked as Na-Ca type bicarbonate water and cold waters are ranked as Ca+Mg type bicarbonate water classes. According to Schoeller diyagram which was made as a result of the chemical analysis of the samples which were taken from the waters in the investigation area, waters are same origin, same aquifer and same feeding ground. This thesis dwells on the hydrogeological model of Dümbüldek thermal area, its energy potential, use of facilities and problems encountered with the use of thermal waters by evaluating the geological, hydrogeological and hydrogeochemical data obtained from Dümbüldek Thermal area.