Design of Hydro Power by Using Turbines Kaplan on The Discharge Channel Paiton 1 and 2 Alvin K. Sosilo, Harsono Hadi and Totok Soehartanto E3S Web Conf., 42 (2018) 01008 Published online: 29 June 2018 DOI: 10.1051/e3sconf/20184201008