The Slope Dynamic of Cilacap Backshore During Transition Season Florencius EkoDwi Haryono, Lazuardy Nalendra, Mukti Trenggono, Amron Amron and Hartoyo E3S Web Conf., 47 (2018) 05001 Published online: 01 August 2018 DOI: 10.1051/e3sconf/20184705001