Risk Analysis of Coastal Disaster of Semarang City, Indonesia Sunaryo Sunaryo, Ambariyanto Ambariyanto, Denny Nugroho Sugianto, Muhammad Helmi, Awaluddin Halirin Kaimuddin and Agus Indarjo E3S Web Conf., 31 (2018) 12009 Published online: 21 February 2018 DOI: 10.1051/e3sconf/20183112009