Jurnal Sains Teknologi dan Lingkungan (JSTL)
Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN

Variasi Penempatan Bronjong Di Hilir Kolam Olak Terhadap Pola Gerusan Dasar: Variations in the Placement of Gabions in the Downstream of the Pool Against Basic Scouring Pattern

I Dewa Gede Jaya Negara (Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram)
Salehudin Salehudin (Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram)
Lilik Hanifah (Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram)
I Wayan Yasa (Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram)
Ni Putu Ira Sintia Kurnianti (Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram)



Article Info

Publish Date
30 Jun 2022

Abstract

The existence of a weir is often disrupted by the occurrence of scouring downstream, which results in an insecure weir position. This study aims to determine the effect of installation of gabion variations downstream of stilling ponds on the depth and length of scour at the bottom of the channel. The test was carried out at the Hydrology and Coastal Laboratory of FT Unram in a straight channel with dimensions of 7.5 m x 0.55 m x 0.5 m, with an Ogee type spillway and a USBR Type III stilling pond. The dimensions of the test gabions are 0.55 m x 0.18 m x 0.09 m with a gravel diameter of 1 (P1 ) 0.035 m, (P2 ) 0.0175 m and (P3 )0.00875 m, and the variation of discharge 1(Q1) 0.0019 m3/s, discharge 2(Q2) 0.0036 m3/s, discharge 3 (Q3) 0.0047 m3/s and discharge 4 (Q4) 0.0065 m3/s. The results showed that in conditions without gabions, scour was prone to occur near the end of the stilling pond to the center of the channel bottom and towards the right side of the channel, with a scour depth of 0.002m – 0.023m and a length of 0.075m – 0.45m. For conditions with gabions, the scour length ranges from 0.15m – 0.275m with a depth of 0.0016m – 0.026 m, the scour occurs more evenly to the left and right of the channel.  

Copyrights © 2022






Journal Info

Abbrev

jstl

Publisher

Subject

Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health

Description

Jurnal Sains Teknologi dan Lingkungan (JSTL), merupakan media untuk publikasi tulisan asli yang berkaitan dengan sains teknologi dan lingkungan baik dalam Bahasa Indonesia maupun Bahasa Inggris. Jurnal Sains Teknologi dan Lingkungan (JSTL) merupakan jurnal ilmiah terbitan berkala dua kali setahun ...