Article Per Year (5 Year)
p-Index From 2020 - 2025
0.92
P-Index
This Author published in this journals
All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Kelautan Tropis Indonesian Journal of Oceanography
Jihadi, Muhammad Shulhan
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Determination of chlorophyll-a and its distribution in the waters of the mangrove forest rehabilitation area in Mojo Estuaria, Pemalang Maharani, Galung Dhiva; Indarjo, Agus; Hadibarata, Tony; Zainuri, Muhammad; Endrawati, Hadi; Redjeki, Sri; Pribadi, Rudhi; Rochaddi, Baskoro; Ismanto, Aris; Jihadi, Muhammad Shulhan
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.23253

Abstract

Pemalang Regency has a mangrove area of around 2,839.44 but has been damaged reaching 453.38 Ha or about 16% of the existing area. This causes ecological functions in resisting abrasion, erosion, sedimentation, and carbon capture to decrease. Government efforts to restore the function of mangroves on the North Coast of Central Java carried out by rehabilitation require input from a water productivity approach. This study aims to determine the content and distribution of chlorophyll-a found in Pemalang Waters, Central Java. This was done by in situ observations in Pemalang Waters to see the fertility level of the waters, by purposive sampling at 20 sampling site, on April 30, 2024. The results obtained will be interpolated with ex situ data, including the Indonesian Earth Map (RBI), tidal data obtained from the SRGI website, flow data obtained from the Batnas website, and wind data obtained from the BMKG website. The next geospatial approach is ODV 4, Ms.Excel, and WR Plot application mapping; current analysis will be performed using ArcGIS 10.8 and Mike 21 applications; while the tidal analysis is carried out by the Admiralty method. The results of research conducted in Mojo Waters, Pemalang showed that the range of chlorophyll-a values was in the range of 1,858 - 41,287 mg / m3. The results were analyzed in sampling areas including rivers, estuaries, lagoons, eastern drift currents, western drift currents, waters still affected by estuaries, and the high seas. The distribution of chlorophyll values in these waters is the impact of nutrient supply from land because it is closely related to human activities, freshwater and seawater resuspension, drift currents, breaking waves, tidal currents. This causes the distribution pattern to occur from northeast to southwest.
Geospatial Modeling of the Nitrate Distribution as an Indicator of Aquatic Fertility in the Lagoon Waters of the Mangrove Information Center (PIM), Pekalongan Zainuri, Muhammad; Suryani, Oda Gracia Ariela; Ismanto, Aris; Handoyo, Gentur; Rifai, Azis; Rochaddi, Baskoro; Endrawati, Hadi; Kusumaningrum, Hermin Pancasakti; Jihadi, Muhammad Shulhan; Hadibarata, Tony
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24081

Abstract

In the lagoon area of the Mangrove Information Center (PIM), Pekalongan, annual flooding leads to inundation in some land areas, particularly pond areas, lagoons, and residential areas. The area of submergence due to tidal floods in 2020 reached 783.99 hectares. The construction of embankments to the south of the lagoon as protection against flooding has transformed the northern area into a lagoon. Our research, crucial for understanding and managing these environmental changes, aims to determine and analyze the content and distribution of nitrate in the Lagoon Area of Mangrove Information Center Waters, Pekalongan. This was achieved through a thorough process of in situ observations based on purposive sampling at six sampling sites on June 22, 2023. The nitrate distribution data was then interpolated with a 2D current hydrodynamic model, ensuring the most accurate representation of the data. The value of nitrate content in the Mangrove Information Center lagoon ranges between 0.0065-0.1072 mg/L. This distribution pattern, influenced by deposits of mangrove litter, the depth of the lagoon, and water circulation, reflects the accumulation of physical and chemical influences in the waters.
Modelling Migratory Pinch Points and Connectivity of Pygmy Blue Whale Using Circuit Theory: A Case Study of Savu Sea, Indonesia Jihadi, Muhammad Shulhan; Zainuri, Muhammad; Goff, Virginia Andrews-; Widiaratih, Rikha; Kunarso, Kunarso; Indrayanti, Elis
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 2 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.2.174-182

Abstract

Blue whale and their subspecies is an endangered whale species that needs to be conserved by protecting their important habitat and migration corridor. Research about designing and modelling blue whale habitat for marine protected area has been done many times. However, incorporation of connectivity in marine protected areas design and management has been limited due to the complexity of methods used to model connectivity, therefore the implementation among practitioners is inconsistent. An alternative method to model connectivity of pygmy blue whale habitat is discussed through a combination of maximum entropy model and circuit theory. The habitat suitability models were made using satellite-tagged pygmy blue whale data (2012-2016) and oceanographic variables, such as sea surface temperature, chlorophyll, salinity, bathymetry, and seafloor geomorphology for four season that is March-April-May (MAM), June-July-August (JJA), September-October-November (SON), and December-January-February (DJF). The habitat suitability model shows different importance of environmental variables in their preference of habitat in each season, with distance from slope as the most influential parameter during the migration season (54.4% for MAM, 37.8% for SON), mean climatological chlorophyll during winter (31%), and mean climatological sea surface temperature during summer (54.7%). Habitat suitability result were then used to model connectivity, assuming that the whales migrate during MAM and SON. The migration model from Omniscape showed some pinch point, such as Sumba-Sape strait, Alor strait, Rote strait, Ombai strait. These pinch points can be seen as corridors with high potential of pygmy blue whale migration or high connectivity, therefore this area could become priority for conservation.
Variasi Temporal Material Padatan Tersuspensi Menggunakan Citra Sentinel di Muara Sungai Loji Pekalongan Simatupang, Ariel Oscar Paskario; Wirasatriya, Anindya; Maslukah, Lilik; Zainuri, Muhammad; Ridarto, Arij Kemala Yasmin; Jihadi, Muhammad Shulhan; Kunarso, Kunarso
Indonesian Journal of Oceanography Vol 7, No 2 (2025): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijoce.v7i2.26247

Abstract

Material Padatan Tersuspensi (MPT) merupakan partikel yang melayang dikolom perairan dan terdiri dari berbagai komponen organik maupun anorganik. Kehadirannya menyebabkan kekeruhan air sehingga menghalangi sinar matahari yang masuk ke perairan, mengganggu proses fotosintesis dan berdampak negatif pada ekosistem. Pemantauan MPT secara temporal dapat dilakukan melalui pemanfaatkan teknologi penginderaan jauh. Nilai estimasinya sangat bergantung pada pemilihan sebuah algorithma.  Penelitian ini bertujuan untuk menguji kinerja beberapa algorithma sekaligus mengembangkan algoritma secara empiris menggunakan data MPT in situ dan nilai reflektan produk dari citra Sentinel-2 di Muara Loji. Hasil menunjukkan bahwa nilai estimasi MPT dari algorithma yang dikembangkan secara empiris pada penelitian ini menunjukkan kinerja terbaik dibanding algorithma lainnya. Algorithma yang dibangun menggunakan reflektan pada kanal hijau (B3) memiliki kinerja terbaik yang ditunjukkan dengan nilai koefisien determinasi (R²) = 0.422, RMSE = 8.93 mg/L, MAPE = 18.2%, dan Bias = 1.43.  Estimasi konsentrasi MPT lapangan memiliki rerata sebesar 39.19 mg/L, sementara hasil prediksi dengan algorithma Ajiperwata (37.88  mg/L), Wirasatriya (48.98 mg/L), Maslukah (11.54 mg/L), Laili (13.42 mg/L), dan algorithma baru memiliki nilai rerata 39.90 mg/L. Penelitian ini masih memiliki keterbatasan, karena algorithma dikembangkan berdasarkan satu kali pengambilan, yang mewakili musim peralihan, sehingga masih diperlukan pengujian atau validasi terhadap data MPT di waktu lainnya. Meskipun demikian algorithma yang dihasilkan dapat membantu dalam monitoring jangka panjang di musim yang sama. 
Sebaran Nitrat dan Ammonium di Wilayah Mangrove Mojo, Kabupaten Pemalang Parry, Markus Julio; Zainuri, Muhammad; Indrayanti, Elis; Lukman, Annisa Aulia; Jihadi, Muhammad Shulhan; Wahyuningsih, Candra
Indonesian Journal of Oceanography Vol 7, No 3 (2025): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijoce.v7i3.26529

Abstract

Wilayah Mojo terletak di pantai utara Pulau Jawa tepatnya di Kabupaten Pemalang, yang merupakan daerah potensial dan memiliki  kawasan mangrove strategis yang berperan penting dalam ekowisata, produksi tambak, dan keseimbangan ekosistem pesisir. Di tengah tingginya aktivitas antropogenik seperti industri, pelabuhan, pemukiman, dan pertanian yang berdampak pada peningkatan konsentrasi nutrien, penelitian ini penting untuk dilakukan dengan tujuan mengidentifikasi konsentrasi dan sebaran horizontal nitrat dan ammonium sebagai indikator kualitas perairan. Sampel diambil dari 14 stasiun yang mewakili empat daerah yaitu laut, pantai, sungai, dan laguna. Nitrat dianalisa dengan metode reduksi cadmium (SNI 6989.79:2011) menggunakan spektrofotometer UV-Vis dengan panjang gelombang 543 nm. Analisa ammonium dengan metode oksidasi (SNI 06-6989.30-2005) menggunakan spektrofotometer UV-Vis pada panjang gelombang 640 nm. Hasil penelitian menunjukkan konsentrasi tertinggi berada pada daerah sungai yaitu nitrat dengan kisaran nilai antara 0,355–1,608 mg/L dan ammonium dengan kisaran nilai antara 0,029–0,056 mg/L, dan secara perlahan mengalami penurunan ke arah laut mengikuti pola arus. Hasil penelitian diharapkan dapat menjadi masukan dalam penentuan strategi pengelolaan perairan yang efektif dan berkelanjutan guna mengantisipasi gangguan pada kualitas perairan, menjaga kelestarian ekosistem mangrove dan mendukung kesejahteraan masyarakat pesisir.
Co-Authors Agus Indarjo Anindya Wirasatriya Aris Ismanto Azis Rifai Baskoro Rochaddi Elis Indrayanti Gentur Handoyo Goff, Virginia Andrews- Hadi Endrawati Hermin Pancasakti Kusumaningrum Kunarso Kunarso Lilik Maslukah Lukman, Annisa Aulia Maharani, Galung Dhiva Muhammad Zainuri Parry, Markus Julio Ridarto, Arij Kemala Yasmin Rudhi Pribadi Simatupang, Ariel Oscar Paskario Sri Redjeki Suryani, Oda Gracia Ariela Tony Hadibarata, Tony Wahyuningsih, Candra Widiaratih, Rikha