Analisis Distribusi Kecepatan Dan Sedimen Pada Tikungan 55° Saluran Terbuka Tampang Segi Empat

Abstract

Predicting the behavior of the flow in the channel bend quite important, because the channel bend a fairly high degree of cartilage against the destructive force of water when compared to a straight channel. Phenomena that may occur and cause detriment is the phenomenon of sediment transport that passes through the channel bend. The phenomenon that occurs in the channel bend can be detected by measuring the field directly. For a case study of the Irrigation Mataram, research done by the measurement of the concentration profiles of sediment transport using devices Opcon. The study was conducted at a locations with the curves that have angles, α = 55° with Radius = 50 m. From the analysis of the measurement of velocity flow and sediment concentration suspensions were performed at the curves that have angles, α = 55° with Radius = 50 m, indicating that the minimum velocity for trend occurs near the base and the increase in size towards the surface of the stream. Flow velocity acceleration and deceleration experienced when through the turn, which increases the velocity flow in the bend side (inner bank) when passing the initial curves and velocity decreases as it passes through the opposite end of the turn and descent speed on the outside of the bend (outer bank) when passing through curves and initial experience increase in the inside of the turn as it passes through the end of the turn. The concentration of sediment suspensions have almost the same trend for the entire face, the concentration of sediment suspension increases towards the base line and decreased with the trend towards the surface of the water distribution more upright with a more uniform rate towards the surface of the water. In the transverse direction, the concentration of sediment suspension tends to increase towards the inner side of the bend when passing through the initial turn, and then decreases towards the inner side of the bend as it passes through the middle of the turn and increased again towards the inside of the turn as it passes through the final turn which resulted in deposition on the inside of the turn (inner bank) and erosion on the outside of the bend (outer bank) at the base of the channel. For analysis of the consentration of sediment suspension field measurement results are compared with the analysis of the Rouse equation and equation-Sugimoto Tanaka showed that the measurement data can reasonably predict the consentration of sediment suspension on curves, although the angle and bend radius varies. Measurement data of suspended sediment consentration approaching the value of data analysis results Rouse and Tanaka-Sugimoto.

Rancang Bangun Deteksi Ketinggian Dan Debit Air Pada Pertemuan Tiga Aliran Sungai Berbasis Internet of Things

“…Kecepatan ini biasanya diukur dalam satuan jarak per waktu, seperti meter per detik (m/s) atau kilometer per jam (km/h). Kecepatan aliran dengan alat flow meter dihitung berdasarkan jumlah putaran baling-baling per waktu putarannya (N = putaran/dt) [11].…”

Analisis Sensitivitas Kecepatan Rata-rata Kedalaman dan Tinggi Muka Air terhadap Parameter Masukan Setting Model pada Saluran Berbelok 180° dengan Menggunakan Program Bantu Delft3D

“…Penelitian lain juga banyak dilakukan oleh peneliti lain terkait aliran pada belokan saluran atau sungai dengan berbagai percobaan seperti debit yang mengalir, bentuk saluran, karakteristik dasar saluran, sudut tikungan, serta berbagai karakteristik aliran yang dijadikan sebagai hal yang ditinjau. [6]- [14] Penelitian terkait saluran berbelok telah banyak dilakukan dengan uji model fisik di laboratorium, namun pada era sekarang telah banyak juga dilakukan suatu pengembangan terkait aliran pada saluran berbelok dengan uji model numerik. Beberapa peneliti telah melakukan penelitian dengan pemodelan numerik yang membahas tentang hidrodinamika pada tikungan tajam, aliran sekunder, dan pengaruh morfologinya tentang defleksi pada belokan dan perilaku alirannya [15]- [17].…”