Analysis of Piping at Kedung Uling Earthfill Dam, Wonogiri Regency, Central Java Province, IndonesiaNajib, Agus Setyawan, Indriyani Ardyarini and Dwiyanto Joko SupraptoMATEC Web of Conferences, 159 (2018) 01039DOI: https://doi.org/10.1051/matecconf/201815901039