2D Modeling of Flood Propagation due to the Failure of Way Ela Natural Dam Bagus Pramono Yakti, Mohammad Bagus Adityawan, Mohammad Farid, Yadi Suryadi, Joko Nugroho and Iwan Kridasantausa Hadihardaja MATEC Web Conf., 147 (2018) 03009 Published online: 22 January 2018 DOI: 10.1051/matecconf/201814703009