Development of erosion risk map using fuzzy logic approach Manyuk Fauzi, Imam Suprayogi, Sigit Sutikno, Ari Sandhyavitri and Eko Riyawan MATEC Web Conf., 101 (2017) 04021 Published online: 09 March 2017 DOI: 10.1051/matecconf/201710104021