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Fenomena Upwelling di Perairan Spermonde Sulawesi Selatan Dyan Viegas Wibisono; Supriyatno Widagdo; Viv Djanat Prasita
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 4 No 2 (2022): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v4i2.54

Spermonde waters are waters that surround the Spermonde islands with shallows located in the southwest of South Sulawesi which is in the tropics and crossed by the equator which causes these waters to experience two different seasons, namely the west and east monsoons. The purpose of this study was to analyze the upwelling phenomenon in spermonde waters. Spermonde waters in the east monsoon (June-August) have the potential for upwelling because they have strong winds and currents so that there is an Ekman transport that causes the deflection of the current to move from southeast to west. Indications of upwelling can be seen from the increase in the temperature and salinity of the water mass from the inside that occurs at all stations so that it is strong for upwelling to occur. The pattern of chlorophyll-a concentrations in the Mediterranean and upwelling seas that occur is weak because the highest chlorophyll is near the coast due to the influence of river water and several other industrial activities so that off shore area shaven ottoo high chlorophyll whichis associated with adecrease in sea surface temperature.

Distribusi Salinitas dan Temperatur Permukaan Berdasarkan Angin dan Arus di Selat Madura Muhamad Samodro Abdulrohiim Rohiim; Supriyatno Widagdo; Viv Djanat Prasita
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 4 No 1 (2022): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v4i1.64

Salinity and Sea Surface Temperature (SST) are important parameters in oceanographic and climate studies. The value of salinity at sea level is caused by precipitation and evaporation of fresh water and is influenced by the entry of fresh water into sea waters. In addition, physical parameters such as wind, ocean currents, and rainfall can also affect horizontal salinity values. Several factors that affect SST are: depth, intensity of sunlight, precipitation and evaporation, as well as wind and air circulation. The purpose of this study was to analyze the effect of seasonal wind and current patterns on salinity and SST in the Madura Strait. The period studied was from 2010 to 2020 with the main parameters analyzed were salinity, SST, wind and currents as well as rainfall and river flows that emptied into the waters as supporting parameters. The results of this study showed that the minimum average salinity value occurred in the transition season at the beginning of the year with a value of 31.8 0/00 and the highest value of 32.77 0/00 occurred in the transition season at the end of the year. And for the lowest average SPL value occurred in the east monsoon season with a value of 28.38 oC and the highest SPL value of 30.17 oC which occurred in the transition season at the beginning of the year.

Fenomena Upwelling di Perairan Spermonde Sulawesi Selatan Dyan Viegas Wibisono; Supriyatno Widagdo; Viv Djanat Prasita
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 4 No 2 (2022): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v4i2.54

Spermonde waters are waters that surround the Spermonde islands with shallows located in the southwest of South Sulawesi which is in the tropics and crossed by the equator which causes these waters to experience two different seasons, namely the west and east monsoons. The purpose of this study was to analyze the upwelling phenomenon in spermonde waters. Spermonde waters in the east monsoon (June-August) have the potential for upwelling because they have strong winds and currents so that there is an Ekman transport that causes the deflection of the current to move from southeast to west. Indications of upwelling can be seen from the increase in the temperature and salinity of the water mass from the inside that occurs at all stations so that it is strong for upwelling to occur. The pattern of chlorophyll-a concentrations in the Mediterranean and upwelling seas that occur is weak because the highest chlorophyll is near the coast due to the influence of river water and several other industrial activities so that off shore area shaven ottoo high chlorophyll whichis associated with adecrease in sea surface temperature.

Distribusi Salinitas dan Temperatur Permukaan Berdasarkan Angin dan Arus di Selat Madura Muhamad Samodro Abdulrohiim Rohiim; Supriyatno Widagdo; Viv Djanat Prasita
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 4 No 1 (2022): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v4i1.64

Salinity and Sea Surface Temperature (SST) are important parameters in oceanographic and climate studies. The value of salinity at sea level is caused by precipitation and evaporation of fresh water and is influenced by the entry of fresh water into sea waters. In addition, physical parameters such as wind, ocean currents, and rainfall can also affect horizontal salinity values. Several factors that affect SST are: depth, intensity of sunlight, precipitation and evaporation, as well as wind and air circulation. The purpose of this study was to analyze the effect of seasonal wind and current patterns on salinity and SST in the Madura Strait. The period studied was from 2010 to 2020 with the main parameters analyzed were salinity, SST, wind and currents as well as rainfall and river flows that emptied into the waters as supporting parameters. The results of this study showed that the minimum average salinity value occurred in the transition season at the beginning of the year with a value of 31.8 0/00 and the highest value of 32.77 0/00 occurred in the transition season at the end of the year. And for the lowest average SPL value occurred in the east monsoon season with a value of 28.38 oC and the highest SPL value of 30.17 oC which occurred in the transition season at the beginning of the year.

The Coastline Change Pattern of Gresik Beach around the Madura Strait, Indonesia Prasita, Viv Djanat; Bintoro, Rudi Siap; Permatasari, Ima Nurmalia; Widagdo, Supriyatno; Sugianto, Erik; Rosana, Nurul
Indonesian Journal of Geography Vol 55, No 3 (2023): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.80934

The coastal region is characterized by dynamic changes in its coastline, which can be attributed to various factors. However, the main causes of change along the Gresik coast have yet to be thoroughly studied. Therefore, this research aims to examine the patterns of coastline change along the Gresik coast around the Madura Strait and the influence of wind-generated waves on them. Specifically, the study focuses on four coastal zones: Ujung Pangkah, Sidayu, Bungah, and Manyar districts. The research utilizes satellite imagery and geographic information systems (GIS) as well as methods for calculating ocean waves to analyze the coastline change patterns. The study also examines the impact of ocean wave energy on coastal abrasion and accretion. The findings revealed that the accretion rate in the study area was higher than the erosion rate. The accretion in the coastal area of Gresik is attributed to the flow of the Bengawan Solo River, which carries sediment from upstream. The accretion and abrasion areas for the entire period from 2002 to 2019 were 1063.16 ha and 425.23 ha, respectively. The study also found that the mangrove areas exhibit a higher rate of accretion than abrasion, indicating their potential as a reliable indicator of the effects of sea level rise resulting from global warming.This study revealed that the northern part of Ujung Pangkah District and Bungah District experienced the highest abrasion patterns, whereas no abrasion was observed in Sidayu District. Between 2002 and 2019, the abrasion areas in Ujung Pangkah and Bungah districts totaled 243.96 ha and 178.29 ha, respectively. Wind-generated waves were likely the primary cause of the abrasion in these areas, though other factors may also have contributed to coastline changes. It is essential to consider these factors for effective coastal management in the region.

Karakter Gelombang Laut di Teluk Love Watu Ulo Kabupaten Jember saat Musim Peralihan I Tahun 2023: Character of Ocean Waves in Love Coastal Bay Watu Ulo Jember District during Transitional Season I in 2023 Susanto, Aries; Pranowo , Widodo Setiyo; Prasita, Viv Djanat
Jurnal Hidropilar Vol. 10 No. 1 (2024): Jurnal Hidropilar
Publisher : Sekolah Tinggi Teknologi Angkatan Laut (STTAL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37875/hidropilar.v10i1.330

Studi ini diarahkan untuk mengevaluasi karakter gelombang di Teluk Love, Watu Ulo, Jember pada musim transisi pertama Tahun 2023. Mengingat bahwasanya di perairan ini banyak aktifitas yang dilakukan masyarakat sekitar diantaranya pariwisata dan proses tambat labuh perahu nelayan dalam rangka bongkar muat hasil tangkapan ikan. Untuk mengurangi dampak yang ditimbulkan oleh gelombang besar dan kuat, dibutuhkan perencanaan pantai yang matang dan desain infrastruktur yang efektif untuk meminimalisir erosi serta meningkatkan proteksi bagi penduduk setempat dan pengunjung. Pendekatan yang diambil adalah evaluasi data dari arsip CMEMS Marine Copernicus yang diolah menggunakan perangkat lunak Ocean Data View (ODV). Hasil studi ini menunjukkan bahwa selama musim peralihan I (Maret-April-Mei) tahun 2023 di perairan Teluk Love Watu Ulo Jember, gelombang signifikan tertinggi adalah 1,81m dan yang terendah adalah 0,52m, keduanya terjadi pada bulan April 2023.

Karakter Oksigen (O₂) Terlarut di Perairan Selat Madura Tahun 2022 : Characteristics of Dissolved Oxygen (O₂) in Madura Strait Coastal Waters in 2022 Wahyu, Inge Eka Nur; Prasita, Viv Djanat; Pranowo, Widodo Setiyo
Jurnal Hidropilar Vol. 10 No. 1 (2024): Jurnal Hidropilar
Publisher : Sekolah Tinggi Teknologi Angkatan Laut (STTAL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37875/hidropilar.v10i1.331

Selat Madura adalah perairan laut yang terletak di antara Pulau Jawa dan Pulau Madura di Indonesia. Letaknya strategis karena menghubungkan Laut Utara Jawa Timur dengan Laut Bali di sisi timur selat. Oksigen terlarut (DO) adalah oksigen (O2) yang terlarut dalam air laut. Oksigen terlarut dalam air sama halnya dengan tekanan parsial O2 di atmosfer. Selat Madura salah satu wilayah penangkapan ikan (fishing ground) komoditas pelagis besar maupun komoditas ikan pelagis kecil. Penelitian ini dilakukan untuk mengetahui kadar oksigen terlarut pada Selat Madura selama Januari, April, Juli dan Oktober 2022. Penelitian ini menggunakan datasets yang diunduh dari CMEMS Marine copernicus dengan produk data yang diambil adalah dari arsip Global Ocean Blogeochemistry Hindcast. Penelitian ini menemukan informasi bahwa pada puncak musim barat (Januari) rata-rata kadar oksigen 8 mg/L, pada musim peralihan 1 (April) rata-rata kadar oksigen 9 mg/L, pada puncak musim timur (Juli) rata-rata kadar oksigen 9 mg/L dan pada musim peralihan 2 (Oktober) rata-rata kadar oksigen 7 mg/L. Jadi perairan di Selat Madura berdasarkan kondisi kandungan oksigen terlarut pada tahun 2022 dapat dikategorikan sebagai perairan yang sangat teroksigenasi, dimaan perairan di Selat Madura mengindikasikan bahwa lingkungan sangat mendukung kehidupan organisme laut yang membutuhkan oksigen untuk bernapas dan melakukan fungsi fisiologis biota laut dengan optimal. Kadar oksigen yang tinggi di laut sangat penting untuk menjaga ekosistem laut yang sehat dan beragam.

INTENSITAS UPWELLING SELAMA PERIODE EL NIÑO–SOUTHERN OSCILLATION (ENSO) DI PERAIRAN SELATAN JAWA Hafiz, Muhammad; Widagdo, Supriyatno; Prasita, Viv Djanat
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 6 No 1 (2024): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v6i1.77

Kondisi perairan Laut Jawa sangat dipengaruhi oleh perubahan parameter oseanografi permukaan dan atmosfer seperti El Niño-Southern Oscillation (ENSO). Anomali tersebut mempengaruhi beberapa parameter oseanografi, termasuk terjadinya upwelling yang intensif. Penelitian ini bertujuan untuk mengetahui potensi dan korelasi parameter oseanografi dengan fenomena upwelling pada masa ENSO dan tahun netral di perairan selatan Jawa. Data angin, arus, suhu, salinitas, dan klorofil-a diperoleh dari website Copernicus pada tahun 2016 hingga 2023. Analisis deskriptif digunakan untuk menganalisis data dengan cara mendeskripsikan data yang dikumpulkan, menentukan transpor Ekman berdasarkan pola angin dan arus, menganalisis secara horizontal menggunakan distribusi suhu, salinitas, dan klorofil-a, serta menganalisis dinamika massa air vertikal berdasarkan suhu dan salinitas di perairan selatan Jawa. Pola angin dan arus di perairan selatan Jawa pada musim timur menunjukkan transpor Ekman akibat adanya angin dari tenggara menuju barat laut sehingga menyebabkan pembelokan arah arus dari tenggara ke barat daya (menjauhi pantai). Suhu Permukaan Laut (SST) di perairan selatan Jawa menjadi lebih dingin pada saat El Niño dan netral, sedangkan pada saat La Niña, SPL menjadi lebih hangat. Nilai salinitas dan klorofil-a cenderung lebih tinggi pada saat El Niño dan kondisi netral. Intensitas upwelling di perairan selatan Jawa bervariasi dari lemah hingga kuat; Diketahui bahwa pada tahun netral dan El Niño intensitasnya kuat, sedangkan pada tahun La Niña intensitasnya cenderung sedang.

Dampak Aktivitas Wisata Bahari Terhadap Kondisi Ekosistem Terumbu Karang Di Gili Labak, Madura Wijaya, Nirmalasari Idha; Prasita, Viv Djanat
Samakia : Jurnal Ilmu Perikanan Vol 15 No 2 (2024): Samakia: Jurnal Ilmu Perikanan
Publisher : Faculty of Science and Technology University Ibrahimy

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/jsapi.v15i2.5789

Gili Labak is a small island in Sumenep Regency. The area of the island is only ± 5 ha, of which 2.1 ha is a stretch of white sand. The width of the white sand beaches surrounding Gili Labak Island is an average of 20 meters wide, with a coastline of 1,200 meters, providing a wide and comfortable beach tourism area for visitors. The coral reef ecosystem on Gili Labak Island, which is in good condition, covers an area of 80.99 ha. This research aims to evaluate the impact of marine tourism activities on coral reef ecosystems. Research was conducted using qualitative and quantitative methods. In this research qualitative methods were used related to tourism activities. The quantitative research method used is a survey method to observe the condition of the coral reef ecosystem on Gili Labak Island, and collect spatial data and attribute data. To determine the impact of tourism on the island of Gili Labak, a questionnaire survey was used to determine the demographics of visitors, their activities on the island. The results of observations of oceanographic conditions obtained in 2019 versus 2023 oceanographic data are not too different. The condition that is very different is the coral cover which tends to decrease. Coral life forms tend to be stable, but there is a decrease in the number of life forms at station 2 which is located on the west side of the island. The results of observations on habitat resilience show that all habitats have high resistance to natural disturbances, but changes in land area and habitat structure easily occur due to human activities, such as marine tourism and fishing boats. Marine tourism activities contribute greater pressure to coral reefs than fishing activities.

Perencanaan Breakwater di Pantai Binuangeun Desa Muara, Kabupaten Lebak, Banten Ahmad Nabil Wahyu Faraby; Rudi Siap Bintoro; Viv Djanat Prasita
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 6 No 1 (2024): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v6i1.82

Pantai Binuangeun yang terletak pada sisi timur Tanjung Panto menghadapi permasalahan serius akibat abrasi yang dipicu oleh gelombang laut. Masalah ini menjadi lebih kompleks karena kurangnya infrastruktur pengamanan, seperti breakwater, yang dapat mengurangi dampak abrasi. Akibat dari abrasi ini adalah perubahan yang berkelanjutan pada garis pantai. Kabupaten Lebak, khususnya Desa Muara, yang terletak di bagian selatan Banten, menjadi salah satu daerah yang sangat terpengaruh oleh perubahan garis pantai ini. Maka perlu dilakukan tindakan pengamanan pantai yang efektif, terutama di Pantai Binuangeun. Salah satu solusi yang tengah dipertimbangkan adalah penggunaan breakwater, yang dapat membantu mengurangi dampak gelombang laut yang merusak. Sebuah analisis mendalam perlu dilakukan. Analisis ini melibatkan pemodelan posisi breakwater dengan menggunakan perangkat lunak Mike 21. Hasil Analisis menunjukkan setelah dibangun Breakwater ini mampu meredam tinggi gelombang pada saat musim timur dengan pasang tertinggi yaitu dari 2.3 m menjadi 1.3 m. dan pada musim barat mampu meredam tinggi gelombang 2.4 m menjadi 1.4 m adapun arah fetch efektif yaitu pada arah tenggara, dan kemudian analisis desain Breakwater setelah perhitungan mencapai 11 m yang di tempatkan pada kedalaman -6 m.

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