The Manna River is located in Ulu Manna District, Bengkulu Selatan Regency, Bengkulu Province, as in the geologically included in The Manna and Enggano Map. In this case, the analysis process is carried out in an area of 9 x 9km, containing two formations, namely The Simpang Aur Formation (Tmps) and The Lemau Formation (Tml). The research area morphologically has an elevation of 25-350mdpl with…