SEDIMENT ANALYSIS IN THE RIVER OF PALEMBANG CITY

Palembang City has several watersheds (DAS), namely the Dam River, Kedukan Bukit River, Sekanak River, and Lambidaro River which are rivers in Palembang City which often experience runoff due to flooding. but there are several problems in the watershed, including the problem of river silting which results in frequent flooding in several river areas during the rainy season. In the last few years, the watershed has not been normalized. Problems in the watershed may also have excessive sediment buildup. If there are no countermeasures, it can lead to silting of the river due to excessive sedimentation. To determine the sedimentation in the watershed, sediment samples were tested using the Duboy's method and the shield's method, the Yang'S method, the Bagnold method, and the Shen and Hung method. The results of the discussion obtained from the results of the Qt calculation are on the Bendung river using the Duboy's method = 131.67 tons / year, Shield's method = 131.35 tons / year. Kedukan River The volume of floating sediment in the next one year is 91,517,472 m³/s for the Duboy's method and 498,89952 m³/s for the Shield method, and for the average of total sediment discharge value obtained from each equation, namely Yang method = 0.0091315 tons/sec, for Bagnold method = 0.0038365 tons/sec and Shen and Hung method = 0.0001495 tons/sec. The average sediment yield that occurs in the Lambidaro River in Palembang City in the next one year is 136.656 kg/year/m. The volume of sediment in the Sekanak River is 10,495.7 (lb/yr)/ft. Shield's method Average yield of qb sediment is 4,064.6 (lb/yr)/ft.