This book is an attempt to reveal the flow characteristics, hydrogeochemistry, and its relation to the water aggressiveness level in dissolving the karst limestone, as well as to study the behavioural components of Karst Dynamic System (KDS) in Bribin Underground River, Gunung Sewu Karst, Indonesia. The research's result demonstrates that there is spatial and temporal differentiation of flow characteristics along Bribin River attributable to the comportment of karst aquifer toward discharging its diffuse, fissure, or conduit flow components, which consequence to the dissimilarity of diffuse...