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All Journal Indonesian Journal of Geography JURNAL TEKNIK HIDRAULIK Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Fisheries : Jurnal Perikanan dan Ilmu Kelautan ACROPORA: Jurnal Ilmu Kelautan dan Perikanan Papua Jurnal Riset Kelautan Tropis (J-Tropimar)
Permatasari, Ima Nurmalia
Prodi Oseanografi, Fakultas Teknik Dan Ilmu Kelautan, Universitas Hang Tuah
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Social Sciences

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Variabilitas Temperatur dan Salinitas Secara Musiman Di Perairan Selatan Jawa Permatasari, Ima Nurmalia
Jurnal Riset Kelautan Tropis (Journal of Tropical Marine Research) (J-Tropimar) Vol 2, No 2: November 2020
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v2i2.44

Abstract

Kondisi perairan laut Jawa sangat dipengaruhi oleh perubahan parameter oseanografi permukaan dan atmosfer dimana arus permukaan yang berasal dari timur mengikuti arah angin yang bertiup secara bertahap sepanjang tahun. Perubahan arus oleh pengaruh angin menyebabkan proses pergerakan lapisan permukaan laut hingga membangkitkan percampuran horizontal (horizontal mixing) yang pada akhirnya arus tersebut akan mendorong terjadinya pergeseran massa air. Pola pergerakan massa air akan mempengaruhi fluktuasi parameter oseanografi permukaan seperti suhu permukaan laut, klorofil-a dan salinitas. Data Suhu dan Salinitas diperoleh dari data citra satelit yang selanjutnya di visualisasikan menggunakan softwere ODV (Ocean Data View) dengan arah vertikal dari permukaan sampai dekat dasar laut kemudian dianalisis distribusi vertikal temperatur, salinitas, dan densitas  mewakili musim Barat, Peralihan I, Timur dan Peralihan II. Suhu permukaan laut saat musim barat dan musim peralihan I lebih tinggi dibandingkan saat musim timur (Agustus) dan musim peralihan 2. Nilai Salinitas dipermukaan laut pada musim barat dan musim peralihan I lebih rendah dari pada musim timur dan Musim peralihan 2.  
Variabilitas Temperatur dan Salinitas Secara Musiman Di Perairan Selatan Jawa Ima Nurmalia Permatasari
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 2 No 2 (2020): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v2i2.44

Abstract

The condition of the Java sea is strongly influenced by changes in surface oceanographic parameters and the atmosphere where surface currents originating from the east follow the winds that blow gradually throughout the year. Changes in currents caused by the influence of the wind cause the movement of the sea surface layer to generate horizontal mixing, which in turn will encourage a shift in the mass of water. The movement pattern of water masses will affect fluctuations in surface oceanographic parameters such as sea surface temperature, chlorophyll-a and salinity. Temperature and Salinity data are obtained from satellite image data which are then visualized using ODV (Ocean Data View) software with a vertical direction from the surface to near the seabed and then analyzed the vertical distribution of temperature, salinity and density representing the West, Transition I, East and Transition seasons. II. The sea surface temperature during the west season and transitional season I is higher than during the east season (August) and the transitional season 2. The salinity value of the sea surface in the west season and transitional season I is lower than during the east season and transitional season 2.
Kajian Resiko, Dampak, Kerentanan dan Mitigasi Bencana Abrasi Dibeberapa Pesisir Indonesia Ima Nurmalia Permatasari
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 3 No 1 (2021): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v3i1.56

Abstract

Coastal areas are areas of sea and land where the region is under pressure due to activities and phenomena that occur on land and at sea. Coastal problems such as coastal morphological changes such as abrasion and accretion occur. Coastal erosion, also known as abrasion, tends to increase in various areas. The cause of coastal erosion itself is Soil Level Drop, land subsidence, mangrove forest damage, damage caused by wave hydrodynamic forces, damage due to other natural causes and damage caused by other human activities. Some factors of disaster risk include the high impact of extreme wave threats and coastal abrasion, the high vulnerability of a region, and the low capacity to face the threat of disasters. Abrasions make residents lose their homes and farmland and encroachment which has resulted in loss of livelihood and reduced income. Today the majority of productive-aged people have a livelihood as factory workers and construction workers. The vulnerability value of an area is influenced by several factors, namely the high density of residents and vulnerable groups, the high number of poor families and fishing groups, the high density of settlements and the lack of vegetation of coastal areas in the face of disaster threats. One of the mitigations carried out is knowing the extent of damage due to abrasion, Knowing the distribution of abrasion areas and abrasion disaster mitigation with community-based coastal area management and integrated coastal management.
Variabilitas Temperatur dan Salinitas Secara Musiman Di Perairan Selatan Jawa Ima Nurmalia Permatasari
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 2 No 2 (2020): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v2i2.44

Abstract

The condition of the Java sea is strongly influenced by changes in surface oceanographic parameters and the atmosphere where surface currents originating from the east follow the winds that blow gradually throughout the year. Changes in currents caused by the influence of the wind cause the movement of the sea surface layer to generate horizontal mixing, which in turn will encourage a shift in the mass of water. The movement pattern of water masses will affect fluctuations in surface oceanographic parameters such as sea surface temperature, chlorophyll-a and salinity. Temperature and Salinity data are obtained from satellite image data which are then visualized using ODV (Ocean Data View) software with a vertical direction from the surface to near the seabed and then analyzed the vertical distribution of temperature, salinity and density representing the West, Transition I, East and Transition seasons. II. The sea surface temperature during the west season and transitional season I is higher than during the east season (August) and the transitional season 2. The salinity value of the sea surface in the west season and transitional season I is lower than during the east season and transitional season 2.
Kajian Resiko, Dampak, Kerentanan dan Mitigasi Bencana Abrasi Dibeberapa Pesisir Indonesia Ima Nurmalia Permatasari
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 3 No 1 (2021): April
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v3i1.56

Abstract

Coastal areas are areas of sea and land where the region is under pressure due to activities and phenomena that occur on land and at sea. Coastal problems such as coastal morphological changes such as abrasion and accretion occur. Coastal erosion, also known as abrasion, tends to increase in various areas. The cause of coastal erosion itself is Soil Level Drop, land subsidence, mangrove forest damage, damage caused by wave hydrodynamic forces, damage due to other natural causes and damage caused by other human activities. Some factors of disaster risk include the high impact of extreme wave threats and coastal abrasion, the high vulnerability of a region, and the low capacity to face the threat of disasters. Abrasions make residents lose their homes and farmland and encroachment which has resulted in loss of livelihood and reduced income. Today the majority of productive-aged people have a livelihood as factory workers and construction workers. The vulnerability value of an area is influenced by several factors, namely the high density of residents and vulnerable groups, the high number of poor families and fishing groups, the high density of settlements and the lack of vegetation of coastal areas in the face of disaster threats. One of the mitigations carried out is knowing the extent of damage due to abrasion, Knowing the distribution of abrasion areas and abrasion disaster mitigation with community-based coastal area management and integrated coastal management.
IDENTIFIKASI PERUBAHAN GARIS PANTAI MENGGUNAKAN PERANGKAT COASTSAT, STUDI KASUS SEGMEN PANTAI NUSA DUA, BALI Ima Nurmalia Permatasari; Totok Suprijo; Budhy Soeksmantono
JURNAL TEKNIK HIDRAULIK Vol 14, No 1 (2023): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v14i1.719

Abstract

ABSTRACTNusa Dua Beach, Bali, is morphologically dynamic because it is constantly changing due to erosion and accretion. In 2003, the efforts were made to develop groins, where this one of the solutions to overcome erosion. Analysis of shoreline changes needs to be carried out to see the effectiveness of groin development by looking at the shoreline before and after construction using Landsat imagery data for 26 years. This research method utilizes the Modified Normalized Difference Water Index (MNDWI) algorithm to separate water from land features, classify images into four classes: sand, water, foam, and land features using the Coastsat toolkit and calculate wave energy flux. Before the construction, The GA1-GA2 groins experienced successive erosion in 1996-2002. After construction of the coastal groins, it still shows a decline in the coastline both during the west monsoon, which is 63.68 m and the east monsoon which is 36.21 m. In the east monsoon, the wave energy flux is most significant, with a maximum value of 4.9 x 10³ N/s, and in the west monsoon 3.4 x 10³ N/s. The effect of the significant wave energy flux that occurs in the east monsoon causes more longshore sediment transport, and the coast experiences a maximum shoreline advance in the east monsoon of 65.24 m compared of the west monsoon shoreline, which is 58.28 m. The toolkit can identify with better accuracy by validating estimation and observation data with an RMSE value of 4.79 m, a bias of 2.62 m, and an R2 of 0.97.Keywords: Shoreline, Erosion, Landsat, Wave Energy Flux  ABSTRAKPantai Nusa Dua, Bali dapat dikatakan secara morfologi dinamis dikarenakan selalu mengalami perubahan akibat erosi dan akresi. Tahun 2003 telah dilakukan upaya pembangunan groin yang merupakan salah satu solusi untuk menanggulangi terjadinya erosi. Analisis perubahan garis pantai perlu dilakukan untuk melihat efektivitas dari pembangunan groin dengan melihat garis pantai sebelum dan sesudah pembangunan dengan memanfaatkan data citra Landsat selama 26 tahun. Metode penelitian ini memanfaatkan algoritma Modified Normalized Difference Water Index (MNDWI) untuk memisahkan air dari fitur daratan, mengklasifikasi citra menjadi empat kelas: pasir, air, buih dan fitur lahan dengan menggunakan toolkit Coastsat serta menghitung fluks energi gelombang. Sebelum pembangunan groin GA1-GA2, pantai mengalami erosi pada tahun 1996-2002. Setelah pembangunan groin pantai masih menunjukkan terjadi kemunduran garis pantai pada saat musim barat 63,68 m maupun musim timur 36,21 m. Pada musim timur fluks energi gelombang terbesar dengan nilai maksimum 4,9 x 10³ N/s dan pada musim barat fluks energi maksimum yaitu sebesar 3,4 x 10³ N/s  Efek dari besarnya fluks energi gelombang yang terjadi di musim timur menyebabkan angkutan sedimen sejajar pantai lebih besar dan pantai mengalami kemajuan garis pantai maksimum di musim timur 65,24 m dibandingkan dengan musim barat 58,28 m. Toolkit coastsat mampu mengindentifikasi garis pantai lebih efisien dengan ketelitian lebih baik dengan validasi data estimasi dan observasi bernilai RMSE 4,79 m, bias 2,62 m dan R2 0,97.Kata Kunci: Garis Pantai, Erosi, Landsat, Fluks Energi Gelombang
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

Abstract

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.
Dampak Upwelling terhadap Zona Potensial Penangkapan Ikan (ZPPI) Giantoro Saputra; Ima Nurmalia Permatasari; Engki A Kisnarti
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 6 No 2 (2024): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v6i2.92

Abstract

Fenomena upwelling yang membawa air dingin dan kaya nutrisi ke permukaan laut berperan penting meningkatkan produktivitas primer perairan, mendukung pertumbuhan fitoplankton sebagai dasar rantai makanan. Proses ini berkaitan dengan kemunculan thermal front, zona pertemuan dua massa air dengan temperatur berbeda,  yang berkontribusi pada produktivitas primer dan distribusi ikan sehingga menarik perhatian ikan pelagis seperti tuna dan cakalang yang bergantung pada ketersediaan makanan yang melimpah. Oleh karena itu pemahaman mengenai dinamika upwelling dan thermal front sangat penting untuk penentuan Zonasi Potensial Penangkapan Ikan (ZPPI). Metode yang digunakan mencakup analisis data citra satelit SNPP-VIIRS dan Aqua-MODIS untuk mendeteksi thermal front menggunakan algoritma Single Image Edge Detection (SIED), serta pengolahan data klorofil-a dan Catch per Unit Effort (CpUE) dengan model Habitat Suitability Index (HSI) dan Generalized Additive Model (GAM). Tujuan dari review ini adalah mengkaji metode efektif yang digunakan untuk menentukan hubungan antara fenomena Upwelling dan Thermal front dalam penentuan sebaran zonasi penangkapan ikan di perairan.  
Pengaruh Perubahan Temperatur dan Nutrisi Terhadap Kelimpahan Fitoplankton Marcy V. Anggraini; Ima Nurmalia Permatasari; Engki A Kisnarti
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.v6i1.87

Abstract

Fitoplankton secara ekologis mempunyai fungsi penting sebagai produsen primer yang sering dijadikan sebagai indikator kesuburan suatu perairan dan secara global merupakan salah satu organisme yang menyumbang hampir 50 % fotosintesis di seluruh dunia.  Selain penting dalam ekosistem global, keberadaan fitoplankton bergantung pada ketersedian nutrien yang cukup. Perubahan temperatur seperti pemanasan iklim global dan curah hujan yang tinggi dapat meningkatkan aliran masuk dan keluar, kenaikan muka air, dan mengubah lapisan campuran yang berdampak pada ketersediaan cahaya dan nutrisi sehingga berdampak pada gugus fungsi dan kelimpahan fitoplankton. Berdasarkan review beberapa penelitian, diperoleh bukti bahwa temperatur dan ketersediaan nutrisi memiliki pera signifikan dalam menentukan kelimpahan fitoplankton diberbagai ekosistem. Sebagai contoh, penelitian di Samudra Atlantik menunjukkan bahwa peningkatan nutrisi berkontribusi signifikan pada biomassa fitoplankton, sementara analisis di Danau Babagoya, Ethiopia, dan Sungai Kanal Utara, China memperlihatkan pentingnya pendekatan indeks ekologis seperti Shannon-Weaver dan Functional Group untuk mengidentifikasi dampak lingkungan. Metode ini menunjukkan efektifitas dalam menganalisis dampak perubahan lingkungan pada komunitas fitoplankton. Penelitian ini memberikan rekomendasi untuk pendekatan Phytoplankton Functional Group (PFG) sebagai indikator dampak lingkungan dan perubahan antropogenik. Pengembangan metode standar berbasis analisis indeks ini diperlukan untuk mendukung pengelolaan ekosistem akuatik secara berkelanjutan.    
Analisis Polimer dan Distribusi Mikroplastik Pada Sedimen dan Air Laut WIke Aulia Firnanda; Engki A. Kisnarti; Ima Nurmalia Permatasari
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 6 No 2 (2024): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v6i2.85

Abstract

Limbah plastik, khususnya mikroplastik, telah menjadi masalah lingkungan yang serius dan mengancam keseimbangan ekosistem laut secara global. Sekitar 80% sampah laut berasal dari aktivitas daratan, terutama di kawasan pesisir yang padat aktivitas manusia dan pariwisata. Studi ini menyoroti pencemaran mikroplastik di zona intertidal Pantai Kebagu dan Pantai ODEC, Sabah, Malaysia, serta pesisir selatan Laut Kaspia, Iran. Hasil penelitian menunjukkan bahwa Pantai Kebagu memiliki kelimpahan plastik lebih tinggi (28,7 g) dibanding Pantai ODEC (13,4 g), didominasi oleh polypropylene (PP) dan polyethylene (PE). Di Laut Kaspia, mikroplastik terdeteksi dalam sedimen dengan konsentrasi 25-330 partikel per kilogram, yang didominasi serat plastik polistirena (PS) dan polietilena (PE). Mikroplastik ini berpotensi mengganggu kesehatan biota laut dan merusak rantai makanan karena sifatnya yang sulit terurai dan kemampuannya mengakumulasi Polutan Organik Persisten (POPs). Dengan meningkatnya aktivitas manusia dan polusi plastik, perlu adanya upaya deteksi yang lebih baik, seperti menggunakan teknik FTIR (Fourier Transform Infrared Spectroscopy) dan spektroskopi mikro-Raman, untuk memahami komposisi dan dampak mikroplastik terhadap ekosistem. Penelitian ini menekankan perlunya pengelolaan sampah yang lebih efektif untuk menjaga keberlanjutan lingkungan laut.     
Co-Authors Beatrice Angelica Hutabarat Bintoro, Rudi Siap Engki Andri Kisnarti Faizah Zasi Fidhini Giantoro Saputra Marcy V. Anggraini Moh. Zaini Nurul Rosana, Nurul Soeksmantono, Budhy Sugianto, Erik Totok Suprijo Vani Apriani Viv Djanat Prasita Widagdo, Supriyatno WIke Aulia Firnanda