ANALISIS ANGKUTAN SEDIMEN KALI PROGO

Abstract

The river is a natural waterway or container in the form of a drainage network along with water in it, starting from upstream to downstream the river flows water from a high place to a low place or from upstream to downstream based on river slope and gravity. If the river flow originates from the volcanic area, it usually carries volcanic material and sometimes it can be deposited along the place along the river channel depending on the flow velocity and steep slope of the river. A general definition of sediment is solid material, otherwise known as clay, soil, sand, and rock. Some scientists use mud as the term kelita refers to finely organic and non-organic sediments, namely clay and silt-sized materials. Sediments can provide tangible benefits especially to humans and river ecosystems in a resource. However sediments also cause problems for humans and habitats where little sediment transport in the river results in degradation, riverbank erosion, sand abrasion and so on. This study aims to determine the size of the progo base sediment grains carried by the current in the bridge pias and find out the value of the progo river sediment transport in the Bantar bridge piers. 2, the average grain diameter is obtained as follows: ????35 = 0.14mm, ????50 = 0.2mm, ????65 = 0.26mm, ????90 = 6mm. In the specimens of the base sediment samples 1 and 2 in the Bantar pias the average values of specific gravity are obtained. the base sediment is 2.64 and the results of the basic sediment transport analysis in the Bantar pyre with the Meyer Peter and Muller method obtained results = 572,711 m3 / day, and Einstein = 443,991 m3 / day. Judging from the results of the analysis with Einstein's method, and the Meyer Peter Muller method it can be concluded that on the Bantar Bridge segment sedimentation or aggression occurs.