I. Ketut Arnawa, I. Made Sukerta, Lily Montarcih Limantara
This study aims to determine the social benefits, the total economic value of Subak and preservation models of Subak in terms of the environment economics aspect. The research was conducted in three Subaks: Subak Sangeh in Badung, Subak Bungan Kapal in Tabanan and Subak Padang Tegal in Gianyar. The social benefits value of Subak was determined by calculating the values of direct use, indirect use value and the value of alternative uses (option value), while the Total Economic Value was determined by the sum of use value and non-use value. The determination of Subak preservation model utilized investment eligibility criteria, namely Net Present Value (NPV) and Net Benefit Ratio (B/C). The findings suggest that, regarding to the environmental economics aspect, the Subak system is feasible and worthwhile to be preserved, as shown by social benefits NPV greater than zero and social benefits Net B/C greater than one. Based on these findings, Subaks in Bali should be managed properly to sustain their environmental functions and proper environmental economic assessment should be conducted as a reference for the efforts to avoid the conversion of Subak farmlands into other functions. © 2018, GEOMATE International Society.
Faculty of Agriculture, University of Mahasaraswati Denpasar, Indonesia; Department of Water Resources, Faculty of Engineering, University of Brawijaya, Malang, Indonesia
