ANALISIS HIDROLIKA BANGUNAN KRIB PERMEABEL PADA SALURAN TANAH (UJI MODEL LABORATORIUM)

HUMAIRAH, AYU MARLINA and Haki, Helmi and Sarino, Sarino (2014) ANALISIS HIDROLIKA BANGUNAN KRIB PERMEABEL PADA SALURAN TANAH (UJI MODEL LABORATORIUM). Undergraduate thesis, Sriwijaya University.

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Abstract

One of the structures to protect river bank erosion is groyne. Groyne can serve and control water flow, reducing flow velocity and scour of river bank. The purposes of this study is to analyze the changes in the river bed elevation (morphology) and the depth of scour in the upstream groyne caused by the permeable groyne installed at the river meanders. The experiment was conducted at Fluid Mechanics and Hydraulics Laboratory, Sriwijaya University. The study tested the hydraulics models adapted to the geometry of Dawas River, a trapezoidal channel, meanders angle of 90°, five permeable groynes at meanders, and the water flowing in the channels was clear water. The observations were carried out with a flow rate was 63,32 Lt / min, three variations of permeable groynes angle were 45°, 90° and 135° to the upstream within 1 hour, 2,5 hours and 4 hours for each angle variations . The results of this study showed that the flow velocity of meanders was decreasing to the end of the meanders, and the changes of channel only occurred at the riverbed. Maximum riverbed changes (Bt / Bo) for permeable groyne angle of 45°, 90° and 135 ° were 1,376 cm, 1,346 cm dan 1,452 cm. The maximum depth of scour (ds/y) for permeable groyne angle of 45°, 90° and 135 were 1,05 cm, 0,95 cm dan 1,17 cm. Thus, permeable groyne with angle of 90 proved to be the best with the smallest riverbed changes (Bt /Bo) was 1,346 cm and the coefficient of determination (R2) was 0,9384, and also the smallest scour depth (ds/y) was 0,95 cm and the coefficient of determination (R2) was 0,8317 compared to other groyne permeable angles.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Permeable Groyne, Flow Rate, Riverbed Changes, Depth Scours
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1-978 Hydraulic engineering
Divisions:	03-Faculty of Engineering > 22201-Civil Engineering (S1)
Depositing User:	Mrs Furika Furika
Date Deposited:	08 Nov 2023 04:50
Last Modified:	08 Nov 2023 04:50
URI:	http://repository.unsri.ac.id/id/eprint/130440

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