Dalrino Dalrino
Jurusan Teknik Sipil Politeknik Negeri Padang

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Gerusan Kaki Akibat Gelombang Pecah Pada Struktur Impermeable Sloping Wall Dalrino, Dalrino; Yurisman, Yurisman; Syofyan, Elvi Roza
REKAYASA SIPIL Vol 7, No 2 (2011)
Publisher : REKAYASA SIPIL

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Abstract

Toe scour is one of phenomenon that frequently experienced by coastal structures and was realized as the causative factor to structure failure. When the structure was placed at coastal environment, existence of that structure will affecting flow pattern at area, one of them is the breaking wave event at around toe area. When breaking wave happened, energy dissipation caused by breaking process compensated in the form of vortex and improvement of flow intensity that have ability to moving bed material from its origin position of rest around the toe. This Research was focused for the breaking wave condition that producing local scouring at toe structure. Testing variable consists of wave height (H ), wave period (T) and water depth at toe (ds). The characteristic of structure was impermeable sloping wall. Physical Modeling was conducted at wave flume with 40 m length, 0.6 m width and 1.1 m height in Balai Hidraulika and Geoteknik Keairan (BHGK) PUSAIR, Bandung. Analysis of the result showed that improvement of toe scour was affected by breaking wave improvement, bed agitation caused by breaking process, down rush flow velocity, decreasing of water depth at toe and increasing of wave length
Analisis Kapasitas Penampang Sungai Batang Mahat Terhadap Besaran Debit Banjir Menggunakan Pendekatan Model Matematik Dalrino, Dalrino; Sadtim, Sadtim; Hartati, Hartati; Agus, Indra
Jurnal Ilmiah Rekayasa Sipil Vol 15 No 2 (2018): Edisi Oktober 2018
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.907 KB) | DOI: 10.30630/jirs.15.2.124

Abstract

Batang Mahat watershed has a total area of 772.87 km2 with a total length of the main rivers around 44.06 km. With the topographic condition on the upstream side was a mountainous terrain and steep slope relatively into downstream. The problem was can be classified as river siltation, narrowing of the river, and riverbank erosion that has caused flood and threaten a public facilities. Numerical simulations using the application of the HEC RAS model were conducted to determine the capability of the river storage capacity into various discharge values. The results of the analysis show that with the discharge condition Q2 there has been flood caused by the high surface elevation of water that was overtopping of the left and right embankments elevation at the upstream and midstream areas. The water surface elevation will increase with the increasing of flood discharge. River normalization efforts with additional depth and widening of river channel were recommended.