Identifying Karst Aquifer Recharge Area Using Environmental Stable Isotopes and Hydrochemical Data: A Case Study in Nusa Penida Island

  • I Ketut ARIANTANA Doctor Study Program of Environmental Science, Udayana University, Indonesia
  • Made Sudiana MAHENDRA Doctor Study Program of Environmental Science, Udayana University, Indonesia
  • I Wayan NUARSA Doctor Study Program of Environmental Science, Udayana University, Indonesia
  • I Wayan Sandi ADNYANA Department of Agroecotechnology, Udayana University, Indonesia
  • Lambok HUTASOIT Faculty of Earth Science and Technology, Bandung Institute of Technology, Indonesia
  • Irwan ISKANDAR Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology
  • Mustiatin MUSTIATIN Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Indonesia
  • Putu Doddy Heka ARDANA Department of Civil Engineering, Ngurah Rai University, Indonesia


Identifying the recharge area of karst aquifers is scientifically challenging due to the complexity of karst groundwater flow characteristics. It is essential to identify the recharge zones to conserve the groundwater resources contained within these aquifers. This paper proposes a combined methods for identifying recharge area of karst aquifers on Nusa Penida Island using stable isotopes (18O and 2H) and a hydrogeochemical approach. Based on the analysis of δ18O and δ2H values and their spatial distribution, it is possible to retrace karst aquifer recharge areas using average isotope elevations. In the meantime, groundwater facies will be determined in the karst region of Nusa Penida using the hydrogeochemical approach with the Piper diagram. According to the calculation of water stable isotope results, the average elevation of the groundwater recharge area at the study site is between 62 - 450 meters. If applied to the location of the study, the recharge area is almost entirely distributed across Nusa Penida. In addition, based on the hydrogeochemical analysis, the groundwater type at the study site can be divided into three categories: Na-Cl, mixed, and Mg-HCO3. The water types indicate that the groundwater in Nusa Penida comes from a combination of old water stored from its internal geological formations and mix with modern rainwater.



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How to Cite
ARIANTANA, I Ketut et al. Identifying Karst Aquifer Recharge Area Using Environmental Stable Isotopes and Hydrochemical Data: A Case Study in Nusa Penida Island. Journal of Environmental Management and Tourism, [S.l.], v. 14, n. 5, p. 2253 - 2270, sep. 2023. ISSN 2068-7729. Available at: <>. Date accessed: 01 oct. 2023. doi: