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All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Journal of Marine Research Jurnal Sumberdaya Akuatik Indopasifik Jurnal Abdi Insani
Ardiansyah, Indra
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics

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STUDI PENGARUH BAHAN LIMBAH KARBIT DAN SEMEN PORTLAND TERHADAP KUAT GESER PADA STABILISASI TANAH LEMPUNG KOTA PONTIANAK Ardiansyah, Indra; Alwi, Abubakar; Aprianto, -
Jurnal Mahasiswa Teknik Sipil Universitas Tanjungpura Vol 7, No 1 (2020): JURNAL MAHASISWA TEKNIK SIPIL EDISI FEBRUARI 2020
Publisher : Jurnal Mahasiswa Teknik Sipil Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (770.395 KB)

Abstract

Tanah merupakan akumulasi partikel mineral, bahan organik dan endapan–endapan yang relatif lepas (loose), yang terletak di atas batuan dasar (bedrock). Tanah lempung dapat menyerap air yang cukup banyak dan mengalirkan air sangat rendah. Tanah lempung memiliki daya dukung yang rendah, air sangat mempengaruhi perilaku fisis dan mekanisnya. Tanah dapat diartikan sebagai lapisan sedimen lepas seperti kerikil (gravel), pasir (sand), lanau (silt), lempung (clay) atau campuran dari keseluruhannya. Stabilisasi tanah lempung menggunakan bahan kimia merupakan salah satu cara yang dilakukan untuk meningkatkan daya dukung tanah lempung. Pada metode penelitian ini penulis melakukan suatu metode pengujian tanah dengan stabilisasi additive berupa limbah karbid dan semen Portland untuk melihat seberapa besar pengaruh campuran additive terhadap peningkatan nilai CBR, UCS dan geser lansung. Pada penelitian ini digunakan tanah dari daerah lingkungan universitas tanjungpura, variasi penambahan additive sebesar 10%, 20%, dan 30%. Hasil dari penambahan variasi additive untuk nilai CBR standar didapat optimum pada mix. desain A1 sebesar 130.255%, nilai UCS standar didapat optimum pada mix. desain B1 sebesar 10.118 kg/cm2, nilai geser lansung yang didapat kohesi (c) optimum pada mix. desain A1 0,617 kg/cm2 dan nilai Sudut Geser (ϕ)° optimum pada mix. desain B1 14.359˚.
Stok Karbon dan Status Kondisi Komunitas Mangrove Pulau Simuang Kepulauan Tiworo Sulawesi Tenggara Maharani, Maharani; Kharisma, Gaby Nanda; Hasidu, La Ode Abdul Fajar; Ardiansyah, Indra; Prasetya, Arif; Riska, Riska; Agusrinal, Agusrinal; Rosalina, Dwi; Ansar, Soehardiman
Journal of Marine Research Vol 12, No 4 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i4.41024

Abstract

Pulau Simuang merupakan salah satu pulau kecil yang ada di guguan Kepulauan Tiworo dengan potensi mangrove yang cukup besar. Sayangnya, studi mengenai status kondisi komunitas dan stok karbon mangrove di Kepulauan Tiworo masih sangat terbatas. Penelitian ini bertujuan untuk menganalisis status kondisi komunitas mangrove, biomassa, stok karbon, dan penyerapan CO2 oleh vegetasi mangrove. Penelitian ini dilakukan di Pulau Simuang, Kepulauan Tiworo, dengan total empat stasiun penelitian. Analisis struktur komunitas mangrove menggunakan metode transek kuadrat. Garis transek dibentangkan tegak lurus dengan garis pantai. Disetiap transek diletakkan empat plot berukuran 100m2. Data yang dikoleksi berupa jenis, jumlah jenis, dan diameter batang (dbh). Analisis data dilakukan untuk menentukan kerapatan, status kondisi, biomassa, stok karbon, dan penyerapan CO2 oleh vegetasi mangrove. Hasil penelitian ini yaitu status kondisi komunitas mangrove di Pulau Simuang masih dalam kategori baik/padat (kerapatan berkisar antara 1825-2775 ind/ha2). Biomassa mangrove diperoleh berkisar antara 213,26 ton/ha2 sampai 506,24 ton/ha2. Stok karbon dan penyerapan CO2 di setiap stasiunberbanding lurus dengan data biomassanya. Stok karbon diperoleh berkisar antara 100,23 ton C/ha2 sampai 237,84 ton C/ha2. Selain itu, penyerapan CO2 oleh vegetasi mangrove berkisar antara 367,51 ton CO2/ha2 sampai 872,08 ton CO2/ha2. Meskipun kondisi mangrove masih dalam kategori baik/padat, masih terdapat sisa aktivitas penebangan mangrove di beberapa lokasi. Untuk itu diperlukan upaya perlindungan kawasan untuk menjaga fungsi ekosistem mangrove di kawasan tersebut. 
PENERAPAN TEKNOLOGI TRANSPLANTASI DAN RESTORASI KARANG UNTUK MENINGKATKAN PENDAPATAN MASYARAKAT NELAYAN DI PERAIRAN DESA TANJUNG TIRAM, KABUPATEN KONAWE SELATAN, SULAWESI TENGGARA Riska, Riska; Lalang, Lalang; Ode, Altafakur La; Ardiansyah, Indra; Kaatu, Kasnia
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.2100

Abstract

Coral reef ecosystems are highly vulnerable to damage. Various environmentally harmful activities by the community in the waters of Tanjung Tiram Village have led to the degradation of coral reefs. One of the efforts made to preserve and maintain coral reef ecosystems is the application of coral transplantation and restoration technology. This community service (PkM) activity aims to rehabilitate the coral reef ecosystem in collaboration with the partner group, Kelompok Harapan Bersama. The methods used to support the implementation of the PkM program include socialization, training, and demonstrations on coral rehabilitation techniques using the spider web-shaped hexagonal frame method. This method involves planting coral fragments or pieces into damaged areas, with the hope that the coral will grow and thrive, thereby restoring the ecological function of the coral reef ecosystem. The application of coral transplantation and restoration technology involves several stages, from preparation, transplantation, and restoration implementation, to maintenance for the sustainability of the coral reef ecosystem. The use of coral transplantation and restoration technology has become a promising solution for coral reef ecosystem restoration efforts. This technology has been proven effective in various areas and provides positive results, both ecologically and economically. The PkM activity received a positive and enthusiastic response from the partner group, with the coral transplantation area potentially becoming a new fishing ground for the local fishing community. An aquatic environment with a healthy coral reef ecosystem will produce abundant fish resources.
Identifikasi Penyakit dan Gangguan Kesehatan Karang di Perairan Pomalaa Sulawesi Tenggara Riska, Riska; Pariakan, Arman; Lalang, Lalang; Ardiansyah, Indra
Jurnal Sumberdaya Akuatik Indopasifik Vol 9 No 2 (2025): Mei
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46252/jsai-fpik-unipa.2025.Vol.9.No.2.498

Abstract

Coral reef ecosystems have an important role in maintaining the balance of the marine environment, providing habitat for various ecosystems, and supporting the existence of coastal and marine resources. However, coral is also vulnerable to being threatened by various diseases and health disruption which can cause a decline in its quality and sustainability. This research aims to identify types of diseases and coral health disruption, forms of coral growth infected with diseases and disruption, and analyze the prevalence of coral diseases in Pomalaa waters. Sampling was carried out at 4 observation points. The research used a survey method and a belt transect method, measuring 5 m x 50 m to identify coral diseases and health problems. The research results found 6 types of coral disease, namely Black Band Disease (BBD), White Syndromes (WS), Yellow Band Disease (YBD), Pink Plotch (PP), Ulcerative White Spots (UWS), and Red Band Disease (RBS). Coral health disruption are generally caused by coral bleaching, Crown of Thorns Starfish, Growth Anomalies, Pigmentation Response, and Sediment Damage. The decline in the quality of the aquatic environment plays a major role in the emergence of various diseases and disruption of coral health, which have an impact on physiological disturbances for coral biota. Meanwhile, the coral growth forms (lifeforms) that are infected are Acropora Branching, Acropora encrusting, and Coral Massive. The highest prevalence rate of coral disease was at station 1, while the lowest was at station 4. The high prevalence rate of corals was the result of a combination of various natural and anthropogenic factors. The low level of coral prevalence at station 4 is possible because this side is a windward area that is exposed to currents at all times, thus helping corals to clean sediment attached to the surface which may carry bacteria that cause disease and coral health disruption. Global warming, pollution, destructive fishing practices, and invasive species are some of the main causes that increase corals' vulnerability to disease and health disorders.
Co-Authors Abubakar Alwi Agusrinal Agusrinal Al Tafakur La Ode Ansar, Soehardiman Aprianto, - Arif Prasetya Dwi Rosalina Gaby Nanda Kharisma Hasidu, La Ode Abdul Fajar Kaatu, Kasnia Lalang, Lalang Maharani Maharani Maharani, Maharani Pariakan, Arman Riska Riska