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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Nusantara Civil Engineering Journal Advances in Tropical Biodiversity and Environmental Sciences
Emil Azmanajaya
Balikpapan State Polytechnic
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Environmental Science Immunology & microbiology Medicine & Pharmacology Veterinary Other

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Population Density and Diversity of Macrozoobenthos in Seagrass Ecosystems in the Coastal Area of Tablolong Village Chaterina A. Paulus; Aludin Al Ayubi; Lebrina I. Boikh; Suprabadevi Saraswati; Emil Azmanajaya
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 1 (2025): February 2025: Pages 1-66
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i01.p09

Abstract

The presence of macrozoobenthos associated with seagrass ecosystems plays an important role in ecological systems and bioindicators for water quality assessment. This study aims to determine the density and diversity of macrozoobenthos populations in seagrass ecosystems in the tourism area in the coastal area of Tablolong village, West Kupang district, Kupang regency. The data collection method in this study was the observation method using the quadrant transect technique. The data collected in this study were analyzed using qualitative and quantitative descriptive analysis. The findings of this study revealed 38 macrozoobenthos species including Hemicantrotus pulcherimus, Tripneustes gratilla, Echinotrix sp, Echinometra sp, Diadema setosum, Holthuria atra, Synapta macullata, Holothuria edulis, Archaster typicus, Protoreaster nodosus, Heniricia sp, Ophiotrix sp, Paguristes cadenati, Coenobita rugosus, Portunus sp, Eurynoma aspera, Calappa hepatica, Trocus sp, Strombus luhuanus, Lambis-lambis, Strombus gibherulis, Strombus urceus, Strombus costatus, Cypraea trigis, Cypraea errones, Euspira sp, Cymatium sp, Vexillum sp, Amoria sp, Conus marmoreus, Conus colubrinus, Jorunna parva, Fragrum sp, Frachycardium sp, Maetra sp, Pina sp, Xenophora sp, and Andara antiquate, then population densities between 25.47-59.93 ind/m² with an average value of 44.0 ind/m² or in the low category, as well as the diversity value ranging from 0.317-0.368 with an average value of 0.348 or also in the low category.
Analisa kapasitas saluran drainase di jalan mayor pol. Zainal arifin kelurahan damai kota balikpapan dengan SWMM Machdafa Almadea Shopia; Emil Azmanajaya; Sunarno Sunarno
Nusantara Civil Engineering Journal Vol 3 No 1 (2024): Nusantara Civil Engineering Journal
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v3i1.534

Abstract

Jalan Mayor Pol. Zainal Arifin merupakan salah satu jalan Alternatif guna menghubungkan daerah sungai Ampal dan M.T Haryono. Curah hujan yang tinggi di Balikpapan mengakibatkan banjir di beberapa tempat salah satunya Jalan Mayor Pol. Zainal Arifin atau biasa disebut Daerah Beller. Permasalahan banjir kerap kali terjadi namun belum ada solusi atau penanganan yang dilakukan pada daerah ini. Sistem drainase yang ada tampak tidak mampu mengalirkan debit air pada jalan ini. Penelitian bermaksud untuk mengetahui dimensi drainase yang mampu untuk menampung air dengan curah hujan maksimum. Dalam penelitian ini, analisis data dilakukan menggunakan aplikasi SWMM 5.1, dimulai dari mengidentifikasi penyebab terjadinya genangan hingga merencanakan kapasitas saluran drainase yang ideal.Hasil dari penelitian ini menunjukkan bahwa telah dilakukan simulasi kapasitas saluran drainase eksisting menggunakan aplikasi SWMM 5.1. Simulasi ini menggunakan curah hujan rencana sebesar 294,716 mm dan intensitas hujan puncak sebesar 64,364 mm/jam. Tinggi ukuran saluran eksisting pada lokasi penelitian terukur sebesar 1 m. Pada simulasi perencanaan kapasitas saluran drainase yang ideal didapatkan diameter dengan ukuran 1,5 m. Tidak ditemukan saluran yang bermasalah setelah dilakukan simulasi ulang menggunakan dimensi saluran rencana yang ideal, sehingga ukuran rencana dianggap aman.
Hydrodynamic Control of Suspended Sediment Transport and Coastal Morphodynamics in Tropical Estuarine Systems Under Environmental Pressure: A Case Study of Balikpapan Bay Hadi Hermansyah; Emil Azmanajaya; Sabhan Sabhan; Sushilawati Ismail; Rahmat Bangun Giarto; Ezra Hartarto Pongtuluran; Indriasri Raming
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 31, No 3 (2026): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.31.3.291-308

Abstract

Balikpapan Bay has large and small river estuaries, including the Sepaku River, the Wain River, and the Riko River. The watershed of Balikpapan Bay has a fairly important and strategic role, including as a buffer for the sustainable function of the bay as a seaport for Balikpapan and a source of income for the surrounding community as well as the life of the bay's marine ecosystem.The purpose of this study was to determine the distribution pattern of Total Suspended Solid (TSS)s and changes in the morphology of Balikpapan Bay based on the tidal flow pattern model using the 3-dimensional Mohid model approach. Data collection was carried out on 3rd-20thSeptember 2024. The model used is a hydrodynamic model with bathymetry data and tidal data as the main drivers and secondary data, namely the constant Total Suspended Solid concentration as the input value in model processing. The distribution of very high Total Suspended Solid concentrations occurs at full moon tide until it reaches the mouth of Balikpapan Bay, the area with the highest sediment concentration, namely the Sepaku Bear River ranges from 200-250 mg.L-1 and at the mouth of Balikpapan Bay it ranges from 50-100 mg.L-1. Erosion occurs in the Jenebora area, part of the Kariangau area, and the eastern part of the bay, especially on the coast of Kemala Balikpapan. The observed pattern—elevated TSS during neap or spring-tide conditions and near the estuary mouth, tidal forcing and riverine inputs shape SSC distributions and estuarine turbidity maxima (ETM). Balikpapan Bay could develop an ETM in the vicinity of the river mouths or the estuarine channel mouth under similar forcing, with stronger sediment exchange during higher-energy tidal phases. The Balikpapan Bay results indicate a robust coupling between tidal flow, sediment transport, and estuarine morphodynamics, with significant implications for port operations, coastal resilience, and ecosystem health. High TSS in riverine plumes and erosion hotspots along the coast imply a dynamic sediment regime that will influence dredging needs, shoreline stability, and habitat conditions.
Co-Authors Aludin Al Ayubi Chaterina A. Paulus Ezra Hartarto Pongtuluran Hadi Hermansyah Indriasri Raming Lebrina I. Boikh Machdafa Almadea Shopia Rahmat Bangun Giarto Sabhan Sabhan Sunarno Sunarno Suprabadevi Saraswati Sushilawati Ismail