The definition of a karst drainage basin in the aquifer of the karst area is an absolute thing to do as a water resource management unit. This research aimed to characterize the hydrogeology of the Gunungsewu Karst Area in the upper reach of the Gremeng Karst Drainage Basin. For this purpose. it was divided into three stages. https://www.bekindtopets.com/great-save-C3-dermatome-13020-great-choice/