Tracing flow directions of the Pentung Allogenic River in Gunungsewu Karst Area, Gunungkidul, using artificial tracer test

Abstract Previous studies in the Gunungsewu Karst Area categorized Pentung Allogenic River catchment that drains to Sawah Ombo Pond as upper part of Bribin Drainage Basin (KDB). However, more detailed results from natural isotope after 2010 have provided reasons postulate groundwater does not flow KDB. Therefore, research aimed trace direction Pentung’s flows Gunungsewu’s karstic hydrogeological system. To achieve this, an artificial tracer test was used. There were two fluorescent dye injection namely uranine and tinopal. The confirmed allogenic river’s supplied Beton KDB instead While tracers detected water at Gilap Cave Underground River, they appeared Jomblangan Sriti Spring, parts