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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research)
Supiyati
Jurusan Fisika FMIPA Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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The Affect of Physical Parameters on Flood Potential in the Upstream River and the Musi Watershed of Kepahiang, Indonesia Supiyati; Imania Elisa; Halauddin
Jurnal Penelitian Pendidikan IPA Vol 10 No 10 (2024): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i10.7442

Abstract

Fllod often occur if the rainfall is high, the flood-affected areas are downstream areas around the Musi Watershed of Kepahiang. The purpose of the study was to find out the characteristics of the physical parameters that affect the potential for flooding in the upstream river and the Musi Watershed. The method used are in situ measurement and laboratory analysis. The results of research, the characteristics of the river's physical parameters after the rain, the river flow discharge is 14.50 m3/s, floating sediment discharge 1.13 kg/s, bottom sediment discharge 43 x 10-4 kg/s, and total sediment discharge 113 x 10-2 kg/s. While the condition is not raining, the river flow discharge is 5.37 m3/s, the floating sediment discharge is 0.30 kg/s, the bottom sediment discharge is 32 x 10-4 kg/s, and the total sediment discharge is 30 x 10-2 kg/s. The dominant sediment texture is sand, clay and silt with a grain size of 1.4 mm - 600 µm. The river bathymetry has a lower elevation at the confluence of the Gegasan River and Lanang River which causes the river currents to reverse, if there is an increase in rainfall it will cause flooding in the area around the river.
Pengaruh Power Dinamika Oseanografi Terhadap Perubahan Morfologi Muara Sungai Air Rami dan Selagan Jaya, Provinsi Bengkulu. (The Influence of Oceanographic Power Dynamics on Morphological Changes of Air Rami and Selagan Jaya Estuary, Bengkulu Province) Supiyati; Suwarsono; Septi Johan; Dea Apriliani; Elmiati
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 8 No 1 (2024): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Manageme
Publisher : Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia (APTKLHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/jppdas.2024.8.1.55-72

Abstract

Bengkulu Province has many river estuaries that experience rapid morphological change, making it a watershed problem because it can trigger sedimentation downstream. This research determined the characteristics and influence of oceanographic power dynamics on morphological changes of river estuaries in Bengkulu. The methods are in situ measurements of oceanographic dynamics parameters, visual aerial photography from drones, and maps of the Air Rami and Selagan Jaya Estuary from USGS Landsat-8 satellite imagery. Based on the study's results, the characteristics of the study area have a mixed tidal type leaning to double daily with a formzhal value of 0.509 in the Air Rami and 0.491 in Selagan Jaya. Morphological changes in the estuary are caused by sedimentation, which is influenced by the interaction of oceanographic power dynamics in the form of tides, waves, currents from the watershed, tidal currents, longshore currents, and sediment. This condition is due to the weakening of the current at the mouth of the estuary due to the confluence of tidal currents, currents from upstream of the watershed, and longshore currents so that sediment transport caused by longshore currents is retained and accumulates at the mouth of the estuary. At high tide, the current enters the estuary carrying sediment that has accumulated at the mouth of the estuary. At low tide, when the current speed is slower, it cannot bring the sediment back, so it settles in the estuary. In addition, the inflow of sediment from the upstream watershed into the estuary also contributes to the increasing sedimentation.
Co-Authors Dea Apriliani Elmiati Halauddin Imania Elisa Septi Johan Suwarsono