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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Journal of Geoscience, Engineering, Environment, and Technology MAJALAH ILMIAH GLOBE Dinamika Maritim
Hanah Khoirunnisa, Hanah
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Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Engineering Environmental Science Physics Other

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Using Side-Scan Sonar instrument to Characterize and map of seabed identification target in punggur sea of the Riau Islands, Indonesia. Lubis, Muhammad Zainuddin; Anurogo, Wenang; Khoirunnisa, Hanah; Irawan, Sudra; Gustin, Oktavianto; Roziqin, Arif
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 1 (2017): JGEET Vol 02 No 01 : March (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.113 KB) | DOI: 10.24273/jgeet.2017.2.1.11

Abstract

Punggur sea has many habitats, object, and structured of seabed with hight tide and wave. Side scan sonar is an underwater acoustic instrument for identification of seabed. This research aims to classify types of seabed and measure seabed identification into the sea water with grain size (dB), location, altitude (m) and target using side scan sonar instrument. This research also uses one types of side scan sonar in one places with 3 line of collecting data to get more variant seabed. Side scan sonar data of 20 km of side-scan sonar profiling (CM2, C-MAX Ltd, UK) with altitude max 20 m and a working acoustic frequency of 325 kHz with the zone is taken in the punggur sea (104°08.7102 E, 1°03.2448 N until 1°03.3977N 104°08.8133 E). The data side scan sonar processed using max view software to display the image of the seabed. Results of seabed imagery in the punggur sea on track 1 have Objects found on the ship coordinates 03.3101N 1 ° and 104 ° 08.7362 E with the highest gain value is 6 dB, altitude 18 m on ping 75. Linear regression has y = 0.7016x+12.952 with R2 = 0.4125 (41%). Track 2 has target 1 is the sunken object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1°02.8143 N ° and 104°08.5228 E with highest gain value is 9 dB with altitude 17.7 m and data ping 69. Linear regression has y = 0.2093+12.577 with R2 = 0.2093 (20%). Track 3 has Target 1 is the ship object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1°02.5817 N and 104°08.7337 E with the highest gain value is 8 dB with altitude 16.5 m and data ping 3984. Linear regression has y = 0.5106x +12.84 with R2 = 0.5106 (51%). Track 1 has many targets identification results compared Track 2 and 3.
KARAKTERISTIK SUHU PERMUKAAN LAUT DAN KECEPATAN ANGIN DI PERAIRAN BATAM HUBUNGANNYA DENGAN INDIAN OCEAN DIPOLE (IOD) Surya, Ganda; Khoirunnisa, Hanah; Lubis, Muhammad Zainuddin; Anurogo, Wenang; Hanafi, Aditya; Rizky, Fajar; Timbang, Dirgan; Situmorang, Arini Dewi; Guspriyanto, Deny; Ramadhan, Wahyu Rizky; Mandala, Gio Fitra Tirta
Dinamika Maritim Vol 6 No 1 (2017): Dinamika Maritim, Vol. 6 No. 1, August 2017 (Special Edition)
Publisher : Coastal and Marine Resources Research Center, Raja Ali Haji Maritime University, Tanjungpinang, Indonesia

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Abstract

VARIABILITY OF CHLOROPHYLL-A DISTRIBUTION AROUND BELITUNG ISLAND WATERS OBSERVED BY AQUA-MODIS SATELLITE DATA Wisha, Ulung Jantama; Khoirunnisa, Hanah
MAJALAH ILMIAH GLOBE Vol 20, No 2 (2018)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (996.305 KB) | DOI: 10.24895/MIG.2018.20-2.634

Abstract

Belitung Island has a strategic geographical location, which is directly bordered with Sumatera and Kalimantan also Karimata and Malacca Straits. Those conditions make the waters productivity being high due to the support from the biogeochemical cycle, nutrient runoff, and upwelling. This study aims to determine the seasonal variability of chlorophyll-a (Chl-a) around Belitung waters. The method used in this study was spatial analysis with IDW (inverse distance weighted) to interpolate the Chl-a surface distribution. Sea Surface Temperature (SST) acquired from Aqua-MODIS were retrieved from NASA (National Aeronautics and Space Administration) and wind data were obtained from ECMWF (European Centre for Medium-Range Weather Forecasts), data were analyzed statistically and spatially. The Chl-a concentration in the northeast monsoon ranged 0.38-3.5 mg.m-3, in the southwest monsoon ranged 0.15-18.7 mg.m-3, and in the transitional season ranged 0.29-9.04 mg.m-3. The Chl-a concentration during southwest and 1st transitional monsoons were higher due to the maximum sunlight intensity stimulating photosynthesis of autotroph biota. The condition of SST is indicating the upwelling event that involves wind-driven motion of dense, cooler, and usually nutrient-rich water towards the ocean surface. Seasonal SST variability ranged 22.6-28.3oC, 27.3-32.1oC, 30.7-32.3oC, and  29.1-32.8oC during northeast, 1st transitional, southwest, and 2nd transitional monsoons respectively. The existence of ENSO (El-Nino Southern Oscillation) contributes to enhance the Chl-a concentration. During ENSO years, the Chl-a concentration was higher than non-ENSO years due to the great impact of ENSO inducing upwelling and higher nutrient availability. Chl-a and SST conditions can be used to predict fishing ground and upwelling area. 
The Coherency and Correlation between Sea Surface Temperature and Wind Velocity in Malacca Strait: Cross Wavelet Transform and Wavelet Coherency Application Khoirunnisa, Hanah; Wisha, Ulung Jantama; Lubis, Muhammad Zainuddin
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 3 (2017): JGEET Vol 02 No 03 : September (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1209.809 KB) | DOI: 10.24273/jgeet.2017.2.3.590

Abstract

This study tried to observe the correlation and coherency between sea surface temperature (SST) and wind velocity in the Malacca Strait at the year of 2015. The SST and wind velocity data with 6 hours interval step have been used in this study. S-Transform, the Cross Wavelet Transform, and the Wavelet Coherency were applied to observe the influence of the variation of sea surface temperature to the wind velocity in Malacca Strait. These methods could produce the phase lag and the time of occurrence between them. S-Transform was used to show the spectrum energy of the sea surface temperature variation. The strongest correlation between them has the period of 32 days during July to August and October to November at each point with significance level of 95 %. The coherency of them has the range of 4 to 64 days at each point. The last result is the spectrum energy of SST variation that has the period of 5 to 50 days at each point. It was similar to the result of the correlation and coherence period between the wind velocity and the SST data
KARAKTERISTIK SUHU PERMUKAAN LAUT DAN KECEPATAN ANGIN DI PERAIRAN BATAM HUBUNGANNYA DENGAN INDIAN OCEAN DIPOLE (IOD) Surya, Ganda; Khoirunnisa, Hanah; Lubis, Muhammad Zainuddin; Anurogo, Wenang; Hanafi, Aditya; Rizky, Fajar; Timbang, Dirgan; Situmorang, Arini Dewi; Guspriyanto, Deny; Ramadhan, Wahyu Rizky; Mandala, Gio Fitra Tirta
Dinamika Maritim Vol 6 No 1 (2017): Dinamika Maritim, Vol. 6 No. 1, August 2017 (Special Edition)
Publisher : Pusat Penelitian Sumberdaya Pesisir dan Laut, Universitas Maritim Raja Ali Haji, Indonesia

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Abstract

Assessment of Sensitivity and Validity Hydrodynamic Model in Cisadane Using Delft3d Flow Model Pasma, Gumilang Ramadhan; Suharyanto, Hamzah Haru Radityo; Khoirunnisa, Hanah; Wijayanti, Reni; Gumbira, Gugum; Rachman, Reno Arief
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 1 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.1.133-146

Abstract

The National Capital Integrated Coastal Development (NCICD) program was prioritized as a disaster reduction technology within the annual target of BRIN in 2022. It is a part of the North Java Coastal Integrated Development Program project. A coastal reservoir development plan at the Cisadane River estuary is one of the outcomes. In this case, hydrodynamic modelling is needed to acquire hydrodynamic properties under the existing condition of Cisadane downstream, and it applied the Delft3D-FLOW model. The bathymetric data used in this simulation was obtained from the assimilation of national bathymetric data with a grid spacing of 180 m and field survey data with a horizontal resolution of 10 m and transect spacing of 200 m seaward of the Cisadane estuary. It has interpolated in a regular structured grid with 100 m and 50 m grid spacing. In addition, other data used are three hourly wind data downloaded from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the daily discharge of the Cisadane River in 2021. Astronomical water level data generated from TPXO 7.2 and TPXO 8 were used in the boundary conditions. These data are simulated using the two and three-dimensional flow model Delft3D-FLOW during November 1 – 15, 2021, using four manning coefficients (n) values, which are 0.03; 0.035; 0.04; and 0.045. The validation formulation used Normalization Root Mean Square Error (NRMSE), resulting in 5.3 - 9.6% for all the manning values and domains. The highest correlation coefficient of current velocity (u-v components) is acquired in the 10 km2 domain with 0.797 for the L3 (bottom layer).
Kajian Karakteristik dan Run-Up Gelombang Tsunami Berdasarkan Pemodelan Hidrodinamika 2D di Perairan Selatan Bali Tagore, Rafa Fahrezi; Helmi, Muhammad; Satriadi, Alfi; Khoirunnisa, Hanah; Ismanto, Aris
Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i1.62777

Abstract

Pulau Bali merupakan wilayah yang memiliki potensi bencana alam seperti gempa bumi dan tsunami karena terletak di zona subduksi pertemuan lempeng Indo-Australia dengan lempeng Eurasia dan zona sesar belakang Flores. Kejadian tsunami telah terjadi di wilayah selatan Bali akibat dari bencana gempa Sumbawa (1977) dan gempa Banyuwangi (1994). Kajian terkait karakteristik dan run-up gelombang tsunami masih jarang dilakukan. Penelitian ini dilakukan dengan tujuan untuk mengetahui karakteristik dan run-up gelombang tsunami menggunakan pemodelan hidrodinamika 2D. Simulasi dilakukan menggunakan skenario gempa terburuk dengan kekuatan magnitudo 9,0 melalui model TUNAMI F1 dan TUNAMI N3. Hasil dari penelitian ini menunjukkan bahwa gelombang tsunami yang menjalar dari episenter menuju pesisir selatan Bali memiliki karakteristik waktu tempuh berkisar antara 16 menit 5 detik hingga 30 menit 35 detik dengan tinggi gelombang maksimum berkisar antara 11,113 – 34,446 m. Waktu tempuh penjalaran tercepat dengan tinggi gelombang tertinggi terdapat pada titik observasi Uluwatu dan Pandawa karena jarak yang dekat dengan episenter. Limpasan gelombang yang masuk ke daratan pesisir selatan Pulau Bali mampu menjangkau daratan hingga kisaran 257 – 3140 m dengan limpasan terjauh pada titik observasi Kuta karena morfologi pantai berpasir yang landai, sedangkan Uluwatu dan Pandawa menerima limpasan yang paling sedikit karena morfologi pantai yang berbatu dan tebing curam.
Studi Karakteristik Sedimen Menggunakan Metode Statistik Gradistat Untuk Mendukung Pengembangan Pelabuhan Patimban Rachman, Reno Arief; Firmansyah, Raka; Aziiz, Shafan Abdul; Catur Istiyanto, Dinar; Suharyanto, Hamzah Haru Radityo; Rahili, Nurkhalis; Widagdo, Aloysius Bagyo; Wibowo, Mardi; Khoirunnisa, Hanah
Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i1.60085

Abstract

Pengembangan Pelabuhan Patimban di Subang diharapkan sebagai penyokong pelabuhan Tanjung Priok di Jakarta yang sudah tidak mampu memenuhi kebutuhan bongkar muat dari para pelaku usaha khususnya di Jawa Barat. Dalam melakukan perencanaan dan pengembangan pelabuhan, salah satu hal utama yang perlu dipertimbangkan adalah masalah sedimentasi. Proses sedimentasi di perairan sangat terkait dengan karakteristik sedimen. Tujuan penelitian ini adalah untuk mengetahui pola sebaran karakteristik sedimen dasar seperti kadar air, berat jenis, gradasi, tekstur sedimen, ukuran d50 butir sedimen dan analisis statistik sedimen dasar sehingga dapat mendukung rencana pengembangan pelabuhan. Metode yang dipakai adalah pengambilan sampel sedimen di lapangan, pengujian sampel sedimen di laboratorium, analisis sedimen secara statistik dan analisis deskriptif karakteristik sedimen dasar menggunakan metode Gradistat. Berdasarkan hasil kajian diketahui nilai kadar air 59,06-210,046 %, berat jenis 1,951–2,494 g/cm3, nilai d50 0,07–0,16 mm, ukuran rerata butir 64,0-86,5 µm, sortasi sedimen moderately sorted (terpilah cukup), analisis statistik sedimen tipe platykurtic, jenis lithologi didominasi oleh lanau dan pasir. Diharapkan hasil penelitian ini dapat membantu pengelolaan sedimentasi, merancang pondasi bangunan pantai dan struktur lainnya secara tepat dan efisien. 
Co-Authors Aditya Hanafi, Aditya Alfi Satriadi Arif Roziqin, Arif Aris Ismanto Aziiz, Shafan Abdul Catur Istiyanto, Dinar Dirgan Timbang, Dirgan Firmansyah, Raka Ganda Surya, Ganda Gumbira, Gugum Guspriyanto, Deny Guspriyanto, Deny Mandala, Gio Fitra Tirta Mandala, Gio Fitra Tirta Mardi Wibowo Muhammad Helmi Muhammad Zainuddin Lubis Oktavianto Gustin Pasma, Gumilang Ramadhan Rachman, Reno Arief Rahili, Nurkhalis Ramadhan, Wahyu Rizky Ramadhan, Wahyu Rizky Reni Wijayanti Rizky, Fajar Rizky, Fajar Situmorang, Arini Dewi Situmorang, Arini Dewi Sudra Irawan, Sudra Suharyanto, Hamzah Haru Radityo Tagore, Rafa Fahrezi Ulung Jantama Wisha Wenang Anurogo, Wenang Widagdo, Aloysius Bagyo