The Hydraulics Engineering International Seminar (HEIS) is a biennial seminar organized by the Indonesian Association for Hydraulics Engineers (HATHI), aimed at sharing, and disseminating the hydraulics engineering related knowledges among the academicians and practitioners, from Indonesian and foreign countries. The seminar has been conducted since 2007 under the name of HATHI International Seminar, generally (but not necessarily) conducted in conjunction with one of HATHI scientific meeting, i.e., Pertemuan Ilmiah Tahunan (PIT) which is held annually. To have a better international recognition regarding the international seminar, starting 2023, the HATHI International Seminar is then changed into the Hydraulics Engineering International Seminar (HEIS). The 2023 is then become the year of 8th Hydraulics Engineering International Seminar or HEIS-8.