Konsentrasi Sedimen Suspensi Pada Belokan 57° Saluran Terbuka

Abstract

Predicting the behavior of the flow in the channel turned quite important, because the channel has turned a fairly high level prone to water damage when compared with the straight line. A phenomenon that often occurs and causes kerugikan in turn channel is the sediment transport phenomena.The phenomenon that occurs in the channel turn can be detected by performing measurements directly in the field. For a case study of parent channel mataram, the research done by measurement of sediment concentration profiles using the tool opcon suspension. The study was conducted on curves that have the angle, α = 57 ° with r = 50 m. From the analysis of the measurements of the concentration of sediment suspensions carried out in an open channel with a bend 57 °, indicating that the concentration of sediment suspension had a trend which is almost equal to the entire face, ie the concentration of sediment suspension is increased toward the base line and decreasing toward the surface of the water with the trend of distribution more upright with values more uniform towards the water surface. In the transverse direction, the concentration of sediment suspension tends to increase toward the inside of the bend when passing through the initial turn, then decreases towards the inside of the bend as it passes through the middle of the turn, and again increased toward the inside of the bend as it passes through the final turn which resulted in the deposition on the inside of the turn ( inner bank) and erosion on the outer side of the bend (outer bank) on the basis of the channel. For the analysis of sediment suspension concentration field measurement results are compared with the analysis of the rouse equation and the equation tanaka-sugimoto show that enough measurement data can predict sediment concentration suspension on curves, although the angle and radius of the bend is varied. Suspension of sediment measurement data value is closer to the data analysis results rouse and tanaka-sugimoto. The results of the analysis of tanaka-sugimoto could provide better results than analysis rouse.

Karateristik Distribusi Sedimen Suspensi pada Sungai Alami Menggunakan Persamaan Rouse

“…Aliran air yang tercampur dengan sedimen, akan mengendapkan sedimen berbutir kasar (bed load) terlebih dahulu dibandingkan dengan sedimen berbutir halus (suspended load) yang akan terangkut mengikuti aliran sungai. Untuk mendapatkan data sedimen suspensi, perlu dilakukan pengukuran/pengambilan sampel langsung di lapangan atau dapat memprediksi sedimen suspensi menggunakan persamaan teoritis yang terdapat di literatur [5].…”