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All Journal Silampari Jurnal Pendidikan Ilmu Fisika Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research)
Septi Johan
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Education Physics

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Sebaran Salinitas Pada Saat IOD Positif Tahun 2019 di Perairan Provinsi Bengkulu Septi Johan; Supiyati Supiyati; Suwarsono Suwarsono
SILAMPARI JURNAL PENDIDIKAN ILMU FISIKA Vol 5 No 1 (2023): Silampari Jurnal Pendidikan Ilmu Fisika (SJPIF)
Publisher : LPPM UNIVERSITAS PGRI SILAMPARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31540/sjpif.v5i1.2222

Abstract

This study aims to look at the distribution of salinity in the waters of Bengkulu Province during the strong positive IOD events that occurred in 2019. The research area is the Bengkulu Province region which is in position a using in-depth zonal current data, in-depth temperature data and salinity data. To see the distribution map, this data is then processed using GrADS (The Grid Analysis and Display System) software. The analysis used in this study is the Hӧvmuller diagram analysis. Based on the results of the study during a positive IOD it was seen that there was a movement of deep zonal currents. These zonal currents carry low-temperature water masses from the deep layers to the surface layers. Prior to the occurrence of a positive IOD, the salinity value in Bengkulu Province waters varied between . When a positive IOD occurs, the salinity value in Bengkulu Province waters rises to and is almost uniform.
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 Elwan Stiadi neza agusdianita Supiyati Supiyati Supiyati Suwarsono Suwarsono Suwarsono Yusnia Yusnia