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Kajian Kerentanan Pantai Di Pesisir Kabupaten Rembang Provinsi Jawa Tengah Arini, Dwi Puspa; Indarjo, Agus; Helmi, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.556 KB) | DOI: 10.14710/jmr.v3i4.8368

Abstract

Kabupaten Rembang merupakan wilayah yang secara langsung menerima dampak dari aktivitas erosi akibat arus dan gelombang. Erosi memiliki sifat merusak yang dapat  menganggu keseimbangan ekosistem dan dapat merusak infrastruktur yang telah dibangun pada daerah tersebut dan daerah sekitarnya. Tujuan dari kajian ini adalah untuk mengetahui pengaruh mangrove terhadap tingkat kerentanan pantai dan untuk memetakan Indeks Kerentanan Pantai berdasarkan pada lima variabel yang digunakan yaitu: tipologi pantai, geomorfologi pantai, vegetasi mangrove, kemiringan pantai dan penggunaan  lahan pesisir. Terdapat empat kelas kerentanan pantai di Kabupaten Rembang yaitu rendah, sedang, tinggi dan sangat tinggi. Pengaruh Mangrove untuk Kecamatan Kaliori tidak terlalu tampak, sedangkan di Kecamatan Rembang terjadi perubahan nilai kerentanan pantai dari tingkat kerentanan rendah menjadi tingkat kerentanan sedang.
PEMETAAN TINGKAT KERAWANAN TSUNAMI DI PANTAI PARANGTRITIS DENGAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFI Qoriadi, M. Taufan; Subardjo, Petrus; Helmi, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.322 KB) | DOI: 10.14710/jmr.v2i4.3687

Abstract

Tsunami is one of the natural events that can not be predicted. The causal of tsunami can be submarine earthquake, submarine volcanic eruptions, or submarine landslide. The mapping of tsunami vulnerability in Parangtritis Beach is an effort of disaster mitigation to minimize the negative impact of tsunami. The research is aimed to map the vulnerability of tsunami disaster in the area of Parangtritis Beach. There are five classes of vulnerability level i.e. very vulnerable class, vulnerable class, slightly vulnerable class, safe class, andvery safe class. The places in Kretek Sub-district which are rated vulnerable (very vulnerable, vulnerable, and slighty vulnerable) is covering the area of 1.334,22 hm2 or 52,93 % of Kretek Sub-district. The places in Kretek Subdistrict which are rated safe is covering the area of 1.186,27 hm2 or 47,06% of Kretek Subdistrict.
STUDI KESESUAIAN DAN DAYA DUKUNG KAWASAN UNTUK REKREASI PANTAI DI PANTAI PANJANG KOTA BENGKULU Nugraha, Himavan Prathista; Indarjo, Agus; Helmi, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.02 KB) | DOI: 10.14710/jmr.v2i2.2474

Abstract

resort in the Panjang Beach area. One form of the beach tourism is the beach recreation activities. However, in its efforts to the development of tourism in Panjang Beach needed to be identified and approaches the problems first. The most fundamental and the goal of this research is to conduct a study on the level of suitability and carrying capacity of the Panjang Beach coast primarily for recreational activities. Research carried out by field observations (collecting primary data and secondary data) for 2 months in July 2012 until August 2012 at the Panjang Beach city of Bengkulu, which is divided into seven-point sampling locations from the south up to the north shore. Collecting primary data consist of physics and chemistry sea water data and suitability parameters of beach recreation, such as type of beach, width of the beach, slope of the beach, brightness of sea water, current velocity, water depth, water base material, beach land cover, presence of harmful organism and availability of fresh water. The method used to analyze the results of the research is descriptive method with the help of Tourism Suitability Index analysis and the carrying capacity of Regions that generate value and suitability of the tourist carrying capacity. Based on the results obtained from the calculation of tourism suitability index for coastal recreation activities are mostly above 80%. This indicates that the coastal areas of Bengkulu City, Panjang Beach classified in the category of Highly Suitable (S1) for coastal recreation activities. While the value Capability Area of the Panjang Beach approximately 42.045 people per day.
Analisa Sel Sedimen Sebagai Pendekatan Studi Erosi Di Teluk Lampung, Kota Bandar Lampung Provinsi Lampung Dianpurnama, Dianpurnama; Helmi, Muhammad; Yusuf, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.736 KB) | DOI: 10.14710/jmr.v2i1.2067

Abstract

Shoreline deformation is a result from sediment transport process with an intervention of current. Concept of sediment cell used to facilitate the analysis and it can be seen on satellite images Landsat. The purpose of this research is to identify sediment cell limit and dominant direction of sediment transport along shore, erosion and sedimentation analysis using sediment cell approachment based satellite images analysis and wave modeling. This research used remote sensing method to determine sediment cell limit and ground check method to identify the source, direction and limits of sediments movement. The landmass that got erosion and accretion was obtained from satellite images overlay. Satellite images which used in this research is Landsat 1990, 2000 and 2010. According to the result of overlay, seashore deformation for 20 years was dominated by accretion (167,71 ha wider than erosion). The result of overlay showed that average accretion rate was 8,3855 ha/year and average erosion rate was 1,1745 ha/year. Results of overlay processing based on erosion and accretion showed that seashore in Bandar Lampung divided into 6 sub sediment cell with 5 limit of static sub cell and 1 dynamic sub cell appropriate for cell sediment concept.
Pemetaan Area Genangan Banjir Pasang Di Kawasan Lahan Budidaya Air Payau Kota Pekalongan Provinsi Jawa Tengah Drestanto, Adhyaksa Saktika; Indarjo, Agus; Helmi, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.38 KB) | DOI: 10.14710/jmr.v3i4.8365

Abstract

Kota Pekalongan memiliki Tempat Pelelangan Ikan (TPI) terbesar di Jawa Tengah, namun terjadi penurunan terhadap produksi dan produktivitas yang signifikan. Alternatif yang dapat dilakukan untuk menekan penurunan produksi dan produktivitas maka dapat dilakukan budidaya ikan air payau di wilayah pesisir. Pembuatan lahan budidaya air payau banyak mengalami masalah, utamanya adalah banjir pasang air laut. Berdasarkan pada hal tersebut, maka perlu dilakukan pemetaan daerah terkena dampak area genangan  banjir pasang dan mengkaji lahan budidaya air payau yang terkena dampak area genangan banjir pasang.Penelitian ini dilakukan untuk memetakan lahan budidaya air payau yang terkena dampak area genangan banjir pasang. Metode penelitian yang digunakan dalam penelitian ini antara lain metode rektifikasi, komposit warna, purposive sampling, admiralty, sistem informasi geografi dan regresi linear sederhana. Lima kelurahan yang memiliki lahan budidaya air payau yang terkena dampak area genangan banjir pasang. Kelurahan Bandengan 108,66 ha, Kandang Panjang 59,62 ha, Panjang Baru 27,43 ha, Krapyak Lor 115,55 ha dan Degayu 38,91 ha. Hanya lahan budidaya air payau pada Kelurahan Degayu saja yang tidak terkena dampak area genangan banjir pasang seluruhnya.
Pemetaan Kerusakan Terumbu Karang Akibat Kandasnya Kapal Tongkang di Taman Nasional Karimunjawa, Jawa Tengah Munasik, Munasik; Helmi, Muhammad; Siringoringo, Rikoh Manogar; Suharsono, Suharsono
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1281.398 KB) | DOI: 10.14710/jmr.v9i3.28239

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ABSTRAK: Pemetaan kerusakan terumbu karang akibat kandasnya kapal tongkang di P. Tengah dan di P. Cilik, Taman Nasional Karimunjawa, Jawa Tengah telah dilakukan 2-3 bulan setelah kejadian dengan cara mengukur luas area kerusakan dan menilai kondisi terumbu karang. Pengukuran area kerusakan menggunakan metode penginderaan jarak jauh berbasis Drone (UAV Drone/pesawat tanpa awak) dan penilaian kondisi ekosistem terumbu karang dengan menggunakan metode Underwater Photo Transect (UPT). Tujuan penelitian ini adalah untuk mengetahui kondisi dan kerusakan terumbu karang akibat kandasnya kapal tongkang di P. Cilik dan P. Tengah, Taman Nasional Karimunjawa. Hasil menunjukkan telah terjadi kerusakan fisik di lereng atas terumbu karang pada kedua pulau tersebut berupa karang mati dan pecahan karang. Luas kerusakan terumbu karang di P. Tengah (1.420,32 m2) lima kali lebih luas daripada luas kerusakan terumbu karang di P. Cilik (267,22 m2). Luasnya kerusakan terumbu karang di P. Tengah kemungkinan akibat perbedaan jumlah kapal tongkang yang kandas, waktu kandas dan dominasi karang yang mudah patah (fragile). Komunitas karang keras yang dominan di lereng terumbu P. Tengah adalah karang bercabang (CB), Acropora bercabang (ACB) dan karang lembaran/foliose (CF). Luasan kerusakan dan kondisi terumbu karang akibat kandasnya kapal tongkang ini dapat digunakan untuk pengelola kawasan konservasi dalam perencanaan perlindungan dan restorasi ekosistem terumbu karang di Taman Nasional Karimunjawa  ABSTRACT: Mapping damage to coral reefs due to the barges grounding in Cilik Island (P. Cilik) and Tengah Island (P. Tengah), Karimunjawa National Park, Central Java was carried out 2-3 months after the event by measuring the extent of damage and coral reefs assessment. Damage area measurement using Drone (UAV Drone) based remote sensing and reef ecosystem assessment using the Underwater Photo Transect (UPT) method. The aim of this study was to determine the condition and damage of coral reefs due to the wrecking of barges in Cilik and Central P., Karimunjawa National Park The results show that physical damage has occurred on the upper slopes of coral reefs on both islands is dead coral and coral fragments. Damage to extensive coral reefs in P. Tengah (1,420.32 m2) is five times larger than extensive damage to coral reefs in P. Cilik (267.22 m2). Damage to coral reefs in P. Tengah may cause differences in the number of barges that ran aground, time of aground and the dominance of fragile corals the upper slopes of the coral reefs. The dominant hard coral communities on the upper slopes of P. Tengah reefs are generally composed the fragile corals, such as branching corals (CB), branching Acropora (ACB) and foliose corals (CF). Damage to coral reefs and the condition of the ecosystem caused by the aground of the barges can be used to manage conservation areas in the planning of conservation and restoration of coral reef ecosystems in the Karimunjawa National Park in near future.
MODEL PREDIKSI PERUBAHAN PENGGUNAAN LAHAN DENGAN PENDEKATAN SISTEM INFORMASI GEOGRAFIS DAN CELLULAR AUTOMATA MARKOV CHAIN: STUDI KASUS KABUPATEN ROKAN HULU, PROVINSI RIAU Fitriyanto, Bobby Rachmat; Helmi, Muhammad; -, Hadiyanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.923

Abstract

Rokan Hulu Regency, Riau Province, is one of the largest oil palm plantation centers in Indonesia. The large growth of palm oil plantations in recent years has threatened the existence of protected areas and increased deforestation rates. This study aims to (1) find out the extent of land use change in Rokan Hulu Regency in 2000-2012, (2) predict land use change in Rokan Hulu regency by 2030. This research uses Geographic Information System approach with prediction model of Cellular Automata (CA) Markov Chain. The driving factors of land use change as input of CA Markov Chain model consist of distance to road, distance to river, distance to disturbance area, distance to Plantation Forest, distance to Forest Clearance Permits and slope data. The results showed that the area of deforestation reached 60.38% from 2000 to 2012, mostly in the northeastern region of Rokan Hulu Regency. The prediction model of land use change has an accuracy of 68.15% based on the kappa index agreement (KIA). By 2030, the area of forest land in Rokan Hulu is predicted to be 3.13%
Shallow Water Depths Mapping Using ALOS "“ AVNIR Satellite Imagery at Pari Islands, Seribu Archipelago, Jakarta Sanova, Aulia Seto Sandi; Saputro, Siddhi; Helmi, Muhammad
Jurnal Laut Khatulistiwa Vol 1, No 1 (2018): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v1i1.23987

Abstract

Pari Island has wide shallow water area. Very shallow condition mapping method need more time.satelite remote sensing technology now can be to use mapping shallow water area faster and easier. Aims of this research are mapping the shallow water area and knowing ALOS-AVNIR satellite imagery abilities.This research was done at May "“ July 2009 and the field survey was done at Pari Island  June 8th "“ 22nd 2009. Materials that use acquired 30th April 2008 ALOS-AVNIR satellite imagery and water depth data. This research was using descriptive method. Jupp 1988 method was use to classify the imagery. Water depth data was captured by Echosounder and measure stick.Classification of shallow water depth resulted 5 classes of depth generally, Those depth classes are 0"“0.5 m, 0.5"“1m, 1-3 m, 3-5m, 5-10m, and 10m. Accuration test showed that ALOS-AVNIR satellite imaging acquired 30th April 2008 able to result a good information of shallow water depth.
Pembelaan (Pledoi) Advokat berdasar Paradigma Critical Theory Guba And Lincoln Helmi, Muhammad
Pandecta Research Law Journal Vol 16, No 1 (2021): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/pandecta.v16i1.26457

Abstract

Secara umum pembelaan (pledoi) oleh advokat adalah melindungi hak-hak tersangka/ terdakwa dari perlakuan sewenang-wenang oleh pihak yang tidak bertanggung jawab. Tujuan dari penelitian ini adalah mendeskripsikan pembelaan (pledoi) oleh advokat dengan menggunakan paradigma teori kritis Guba dan Lincoln bahwa posisi tersangka/ terdakwa tidak selalu salah tetapi dalil dakwaannya yang salah. Penggunaan paradigma didasarkan pada tiga pertanyaan, ontologi, epistemologi, dan metodologi. Advokat dan aturannya bersifat Interaktif; temuan di ‹mediasi› dengan nilai yang dipegang. Keduanya saling terkait secara interaktif dan kemudian dimediasi oleh nilai-nilai yang dianut oleh para advokat. Dengan demikian subjektivitas melalui nilai rasa, kreativitas, dan inisiatif advokat berpengaruh pada pembelaan (pledoi). Metodologinya adalah dialogis / dialektika. Penggunaan paradigma critical theory bagi para advokat, mereka harus memperjuangkan pihak-pihak yang terdominasi/ terzolimi untuk mengubah ketidakadilan atas berlakunya dalil-dalil dakwaan. Bagi mereka, aturan didasarkan pada keadilan formil, maka menjadi tugas advokat untuk menemukan keadilan substantif yang memungkinkannya berada di luar aturan. Hal inilah yang menjadi dasar pertimbangan hakim dalam memutuskan.
Freespan Analysis for Subsea Pipeline Integrity Management Strategy Hadi, Nurul; Helmi, Muhammad; Cathaputra, Edo; Priadi, Dedi; Dhaneswara, Donanta
Journal of Materials Exploration and Findings Vol. 1, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. Over a rough seabed or on seabed subject to scour, freespans can occur when contact between a subsea pipeline and the seabed is lost over an acceptable distance. When this exceeds the allowable freespan length, design stresses can be exceeded, and a vortex induced vibration (VIV) response can be initiated, resulting in the risk of fatigue failure. If this is not predicted and controlled properly, it will affect pipeline integrity, leading to expensive rectification and intervention work. Freespan analysis consisted primarily of a screening check in which the as-found freespans from Remotely Operated Vehicle (ROV) or multibeam Side Scan Sonar (SSS) inspection survey were compared against the design allowable lengths and determine the expected fatigue life of a freespan that may be experiencing Vortex Induced Vibration (VIV). Freespans are considered acceptable if the calculated fatigue life exceeds the design life criteria. This paper describes the freespan analysis that has been developed to perform detailed freespan engineering assessments, incorporating the latest survey and as-laid conditions. This analysis follows a methodology in standard code DNVGL RP F105 that has been accepted and used by operators to produce more accurate and less conservative freespan analysis results, leading to a subsea pipeline integrity management strategy with fewer unnecessary interventions and greater cost benefits.
Co-Authors Adhyaksa Saktika Drestanto Afirman Karyono Agung Prasongko, Wahyu Agus Indarjo Ainur Rofiq Sofa Akbari, M. Denny Akhiroh, Puji Akhmad Hanan Alfi Satriadi Ali Rahman Hakim Amaliana Yuniarti Amin, Moh Hasan Shodiqil Amin, Moh. Hasan Shodiqil Aminuyati Anam, M. Khairul Anang Joko Sadono Anindya Wirasatriya Ardilla, Yohana Nanita Nansy Ariputro, Aryobimo Bharadian Aris Ismanto Asyari, Mufidah Atik Winarti Aulia, Zahra Safira Ayudila A. P., Prasasty Azhari Akmal Tarigan Azra, Mhd Rayhan Basir, Basir Baskoro Rochaddi Benny Tyson Siagian Berlianto, Anggit Novian Budhi Santoso Budi Hartono Cahya, Ardhian Indra Cathaputra, Edo Choiriah, Nabila Fitri Dedi Supriadi Denny Nugroho Sugianto Desrina Desrina Dhaneswara, Donanta Dianpurnama Dianpurnama Dwi Haryo Ismunarti Dwi Puspa Arini Edwin Maulani Edy Haryanto Eka Kusumastuti, Anie Eko Nugroho Fahendi Roher Fauzi Hanif Febriani, Diana Nur Febrianto, Nanang Ferry Hermawan Fikri, Hidayatulla Firdausiyah, Jannatul Fitriyanto, Bobby Rachmat Fitriyanto, Bobby Rachmat Fonny Rianawati Gaol, Hadimas Lumban Gentur Handoyo Ghozali, Kanaya Gusti Muhammad Hatta H Hadiyanto Habibah, Wulidatul Hamdi Anugrah, Hamdi Hanah Khoirunnisa, Hanah Hanum Muarifah Hanun, Alain Shofia Harahap, Fasthabiqul Ambiya Hardiyanto Hardiyanto Hardjana, Fahira Mutiara Hariadi Hariadi Hasan, Miftahul Hatmaja, Rahaden Bagas Hayati, Sri Ayatina Herlina Ika Ratnawati, Herlina Ika Heryoso Setiyono Hidayat, Amat Hidayatullah, Muhammad Fatih Himavan Prathista Nugraha Hirawaty Kamarulzaman, Nitty Ivan Febriansyah Izzaturrahim, Muh. Hafizh Jafron Wasiq Hidayat Jamal Jamal Jamhari Jamhari Jannah, Nurul Jarkawi Jarkawi, Jarkawi Jayawarsa, A.A. Ketut Kartika Hariyanto, Hani Khairun Nisa Kunarso Kunarso Laila Hayati, Laila Latifah, Laila Lelalette, Johanis Dominggus Lestari Lakhsmi Widowati Lilik Maslukah Luh Putu Ratna Sundari M. Fachrurrozi M. Furqon Azis Ismail M. Taufan Qoriadi Mahinsha, Amryl Naufal Ilham Mario Putra Suhana Masyithoh, Dewi Meirantika, R. Meirantika, Ruping Melissa Bonauli, Melissa Muarifah, Hanum Muh Yusuf Muh. Yusuf Muhammad Faisal Mahdie Muhammad Husni Muhammad Rifai Muhammad Yusuf Muhana, Muriyani Munasik Munasik Musdalipah, Febby Muttaqien, Moh Hasan Firghol Nadia Ramli, Nurul Naparin, Muhammad Nasir Shamsudin , Mad Noor Mirad Sari Nugroho Agus D Nurhasanah Nurhasanah Nurhikmah Nurhikmah Nurul Hadi, Nurul Nurul Huda, Asri Nurwahyuni, Eka Octavianna, Pramesthi Dwi Pangastuti, Prima Riliayunda Petrus Subardjo Prafitri , Rizky Pratama, Dhika Rino Priyo Sugeng Winarto Puspita Anugra Yekti , Aulia Puspita Anugra Yekti, Aulia Puspita, Dian Endah Putri Utami, Putri Putri, Eka Salma Afifah Putri, Mayada Qorihah Ismayati Rahayu Ningsih Ramadhani, Khoirul Ramadhina Irsanti Putri, Ardyah Rendhy Dimas R, Rendhy Dimas Rezti, Rezti Ria Azizah Tri Nuraini Rikoh Manogar Siringoringo Rina Kurniati Rina Muhayah Noor Pitri, Rina Muhayah Noor Rinakanti, Rinakanti Rinda Nita Ratnasari, Rinda Nita Rini Dwi Wahyuni Rizki Prafitri Rizkiyah, Sinta Asri Rodi Rodi, Rodi Rudhi Pribadi Ryan Nurdiansyah Ryanto, Fauzan Novan Saipiatuddin, Saipiatuddin Sanova, Aulia Seto Sandi Saputri, Elsi Seprianti, Restu Setiawan, Abim Setiyadi, Johar Siddhi Saputro Sinaga, Boby Christian Siswono, Eko Sitinjak, Dedy Febrianto Sri Wilarso Budi Subekti Mujiasih Sugeng Widada Suharsono Suharsono Suharyanto, Oasiska Nuhannaning Sulaiman Sulaiman Tadzkirah, Laila Tagore, Rafa Fahrezi Ulfah Nurjanah, Ulfah Ulfani, Afifa Ulyana, Dyah Nurul Umami, Novita Utami, Hana Putri Violet Warsito Atmodjo Widianingsih Widianingsih Widodo S Pranowo Winarti, Atik Winarto , Priyo Sugeng Winarto, Priyo Yulicia , Zamrudhinda Minna Yusuf Jati Wijaya Zaini, Fina Magfirah Zakiyullah, Azkalakum Zulyani, Zulyani