Temporal Variation of Tropical Karst Groundwater Suitability for Irrigation in Gremeng Resurgence, Gunungsewu Karst Area, IndonesiaAhmad Cahyadi, Tjahyo Nugroho Adji, Eko Haryono, M Widyastuti, Adityas Pradana Kusuma Aji, Muhammad Naufal and Indra Agus RiyantoE3S Web Conf., 202 (2020) 04004DOI: https://doi.org/10.1051/e3sconf/202020204004