Study of Sedimentation Transport in Pinyuh River Estuary Mempawah District, West Kalimantan

Arfena Deah Lestari; Mochammad Meddy Danial; Stefanus Barlian Soeryamassoeka

Authors

Arfena Deah Lestari Department of Ocean Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia
Mochammad Meddy Danial Department of Ocean Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia
Stefanus Barlian Soeryamassoeka Department of Civil Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia

Keywords:

Estuary, sediment transport, longshore transport sediment

Abstract

The Pinyuh River Estuary is one of the access routes for fishing boats, located in Mempawah Regency, West Kalimantan. The estuary of this river experiences narrowing and shallowing due to sediment deposition, resulting in the fishing boats cannot pass through the estuary when the sea water is the lowest. This is caused by an inappropriate sea wall construction and hydro-oceanographic processes. The shipping channel for fishing boats becomes disturbed and experiencing obstacles such as grounding in the estuary. The bathymetric depth is only 0.2 meters in the estuary with the lowest tide. The current speed is measured by current meter and sediment samples are subjected to laboratory tests. The total transport of bottom sediment and floating sediment at the estuary is calculated using the LC Van Rijn method. The longshore transport sediment is analysed using CERC formula by knowing the refraction and breaking waves at the research location. The result shown that the shallowing of shipping channels due to the sedimentation is very significant. There are two options to solve this problem, i.e., dredging works and the coastal protection such as jetties.