Groundwater vulnerability study using SINTACS method in Banguntapan district, Bantul RegencyKartika Ayu Wandari, Ignasius Loyola Setyawan Purnama and Vincentia Anindha PrimacintyaE3S Web Conf., 200 (2020) 02013DOI: https://doi.org/10.1051/e3sconf/202020002013