Determination LMWL Wonosobo Area by Using Nuclear Technology, Case Study: Hydrogeology Study for Aqua Danone CSR Program

¹ Department of Nuclear Engineering and Engineering Physics, Universitas Gadjah Mada, Yogyakarta, Indonesia
² Department of Geology Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
³ PT Tirta Investama Danone Aqua, Jakarta, Indonesia
⁴ National Nuclear Energy Agency of Indonesia, Jakarta, Indonesia

^* Corresponding author: fitrotun.aliyah@mail.ugm.ac.id

Abstract

Corporate Social Responsibility (CSR) program is one of the management concepts whereby the company integrates social and environmental aspect to support their business as the strategy to achieve the company goals for balancing between economic, social, and environmental imperatives. PT Tirta Investama Danone Aqua, which located in Wonosobo has a core business in supplying natural drinking water. To fulfil its responsibility in conserving nature and groundwater reserves, PT Tirta Investama Danone Aqua has a CSR program called Aqua Lestari. The determination of the receiving area of the CSR program should review and analyzed in order the CSR programs is not misplaced. PT Tirta Investama wants the CSR program to be given to the groundwater recharge areas for maintaining groundwater reserves sustainability. Therefore, a comprehensive study concluded to determine the groundwater recharge area studied from the aspects of geology, hydrogeology, and hydro isotope. The application of nuclear technology especially for stable isotope tracer can be used to know the groundwater recharge area, and modeling the flow of subsurface groundwater. Local Meteoric Water Line (LMWL) is used for analysis of groundwater recharge area. The equation of LMWL Wonosobo is δD, ‰ = 8,102 * δ18O + 14,21‰.