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All Journal Indonesian Journal of Geography Bumi Lestari JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Natur Indonesia Jurnal Perikanan dan Kelautan Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Ilmu Perairan (Aquatic Science) Jurnal Online Mahasiswa (JOM) Bidang Ilmu Sosial dan Ilmu Politik Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Journal of Education, Humaniora and Social Sciences (JEHSS) Asian Journal of Aquatic Sciences Unri Conference Series: Community Engagement Jurnal Zona Journal of Coastal and Ocean Sciences Journal of Rural and Urban Community Empowerment EcoNews Jurnal Manusia dan Lingkungan Jurnal Perikanan dan Kelautan Jurnal Natur Indonesia

Rifardi

Universitas Riau

Author-ID : 3004530

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Physics Public Health Social Sciences

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ECOLOGICAL ANALYSIS OF LIVING BENTHIC FORAMINIFERA IN SURFACE SEDIMENTS FROM THE SOUTH YATSUSHIRO KAI (SEA), SOUTHWEST KYUSHU, JAPAN Rifardi ,
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 3 (2002): Volume 5, Number 3, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.685 KB)

Bottom sediments were collected from 74 stations in the South Yatsushiro Kai (Sea), Japan using gravity corer in March 1996. Aimed at clarifying the relation between living benthic foraminiferal assemblage and environmental conditions, the Q-mode cluster analysis was carried out based on the predominant species of living benthic foraminifera recognized at the topmost one centimeter of 73 core samples. The results of this study show a trend of a large number of living benthic foraminifera is found in central part of the sea, on the other hand, a small number is seen in the northern and southern part. The study area is characterized by 469 species of living benthic foraminifera belonging to 114 genera. In relation to the five divisions of the marine environment based on oceanographic data, mechanical analysis data and sedimentation rates, the foraminiferal assemblages in the South Yatsushiro Kai were grouped into five populations. Population I occupies the areas near the straits under the influence of strong tidal and bottom currents. Population II occupies the areas surrounding the straits (Gannoshiri Seto and Kurono Seto) influenced by water masses flowing through the straits. Population III occupies the areas of rather stagnant water masses in the northern and southern parts of the sea. Population IV occupies the areas located in the northeastern and southeastern parts of the sea, and influenced by river waters. Population V occupies the nearshore area located in the northeastern, and influenced by the water masses which flow southward from the North Yatsushiro Kai.

STUDY ON SEDIMENTOLOGY FROM THE MESJID RIVER ESTUARY AND ITS ENVIRONS IN THE RUPAT STRAIT, THE EAST COAST OF SUMATERA ISLAND Rifardi .
JOURNAL OF COASTAL DEVELOPMENT Vol 4, No 2 (2001): Volume 4, Number 2, Year 2001
Publisher : JOURNAL OF COASTAL DEVELOPMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.348 KB)

The sedimentological aspects of the Mesjid River Estuary and its neighboring seas are revealed by various analytical approaches; i.e. mechanical grain size analysis, ignition loss method, metallic element analysis and sand grain composition analysis. The estuary area is characterized by fine sediments (very fine sand to very fine silt). Based on the relation between the character of bottom sediments and the environmental condition, the the Mesjid River Estuary and its Environs is divided into the following three areas: 1) The western part of the study area characterized by rather coarse-grained sediments and low mud content　under the influence of longshore current and poorly sorted sediments supplied by the Mesjid River, 2) The southern part of the study area characterized by coarse-grained sediments under the influence of strong tidal currents, 3) The northern and eastern parts of the study area characterized by fine-grained sediments and high mud content under conditions of sea water masses. The texture and organic matter content of the sediments play important role on the growth of the mangrove which thrive along the coast of the study area.

Analisis Ekologi Foraminifera Bentik pada Permukaan Sedimen Perairan Muara Sungai Mesjid dan Selat Rupat Pantai Timur Sumatera Rifardi Rifardi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 2 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian ini bertujuan untuk menjelaskan hubungan kelompok foraminifera bentik dengan kondisi lingkungan di perairan muara Sungai Mesjid Selat Rupat. Q-Mode Cluster Analysis dilakukan berdasarkan spesies foraminifera bentik dominan yang ditemukan di sedimen permukaan dari 6 stasiun di perairan ini. Hasil penelitian ini menunjukkan bahwa foraminifera bentik ditemukan dalam jumlah banyak di daerah bagian tengah Selat Rupat. Sebaliknya jumlah yang kecil/sedikit ditemukan di mulut Sungai Mesjid. Jumlah foraminifera bentik yang paling banyak ditemukan di daerah transisi yang terletak diantara bagian tengah Selat Rupat dan mulut sungai. Berdasarkan hubungan antara data oseanografi, hasil anaiisis mekanikal sedimen permukaan dengan distribusi foraminifera bentik, maka seluruh foraminifera bentik di esturia Sungai Mesjid Selat Rupat dikelompokkan menjadi tiga kelompok yang masing-masing menempati daerah bagian tengah Selat Rupat yang dipengaruhi oleh massa air laut yang mengalir melalui selat ini, daerah transisi yang merupakan pertemuan dua massa air yaitu massa air dari Selat Malaka dan muara Sungai Mesjid serta yang menempati mulut Sungai Mesjid dan secara dominan dipengaruhi massa air Sungai Mesjid.Kata kunci: foraminifera bentik, sedimen, muara

Deposisi Sedimen di Perairan Laut Paya Pesisir Pulau Kundur-Karimun-Riau Rifardi Rifardi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 3 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Penelitian ini bertujuan untuk menjelaskan hubungan antara distribusi sedimen, jarak dan waktu sedimentasi dengan aktivitas penambangan bawah air dan karakteristik oseanografi, arus dasar dan pasut Sedimen permukaan diambil dari 41 stasiun sampling di Laut Paya dan sekitar Pulau Kundur Propinsi Kepulauan Riau. Hasil penelitian menunjukkan bahwa, bagian utara dari daerah aktivitas penambangan dicirikan oleh sedimen yang dipengaruhi oleh massa air Selat Malaka, sedangkan bagian selatan didominasi oleh sedimen yang berasal dari Pulau Sumatera. Selain itu, sedimen Laut Paya berasal dari hasil abrasi dan lithifikasi pantai Pulau Rangsang dan Kundur. yang berada di depan perairan tersebut. Sebaran sedimen ditentukan oleh arus dasar dan pasang surut, dan penambangan. Ada dua rute sedimentasi, yaitu rute selatan dan utara dari daerah aktivitas penambangan yang ditentukan oleh pola arus pasang surut dan bathimetri perairan. Pada saat pasang, sedimen pasir sangat halus ditransportasikan dari daerah dumping dan penambangan menuju arah selatan Sebaiiknya pada saat surut sedimen ini akan ditransportasikan ke arah barat laut dari daerah dumping dan penambangan Jarak dan waktu deposisi sedimen ini lebih besar dan cepat selama pasang dari pada surut. Perbedan jarak dan waktu deposisi mengindikasikan bahwa kecepatan arus memainkan peranan penting dalam proses deposisi sedimen. Kata kunci: deposisi, sebaran sedimen, penambangan bawah air.

Study Of Distribution And Level Of Nitrate And Nitrite Dissoalved O2 (DO) Central Estuary Aek Tolang Pandan North Sumatra Province Eryandi sitanggang; Mubarak '; Rifardi '
Ilmu Perairan (Aquatic Science) Vol 8, No 2 (2010)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jipas.8.2.p.20-34

This research was conducted in May 2009, in the waters of Muara Aek Tolang Pandan Central Tapanuli of North Sumatra Province. The purpose of this study wasto map the distribution pattern of nitrate and nitrite content and O2 content (DO)dissolved in the mouth of the river Aek tolang horizontally. The method used in thisresearch was survey method. The primary data obtained from direct measurementsand sampling directly in the field and then tabulated and analyzed in the laboratoryare discussed further in descriptive, while secondary data related to research obtainedfrom the relevant authorities. spreading pattern of Nitrate and Nitrite concentrationdistribution was influenced by tides and currents. It can be seen by the differences inconcentration at the surface and ground waters at high tide and low tide at the samestation point. At the time of ups and downs have a much different variations on eachstation. The concentration of dissolved O2 measurements conducted at research sitesat high tide waters ranged from 111.6 ppt - 442.3 ppt. Based on measurements takenin Coastal Estuary Aek Tolang Pandan then the quality of waters in the study area nogood.Keywords: Nitrate and nitrite content, O2 content (DO)dissolved, Spreading

Analisis Karakteristik Sedimen Di Muara Sungai Indragiri Dendy Ariandi; Mubarak '; Rifardi '
Ilmu Perairan (Aquatic Science) Vol 8, No 1 (2010)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jipas.8.1.p.1-13

This research was conducted on August 2008 with purpose has to know the characteristics of sediment at estuary of Indragiri river. The method used in thisresearch was survey method.The research found that there were 2 fractions of sediment I.E. mud and sand withthe type of sediment that were mud, sand, and muddy sand. Mean score for thesediment at the estuary of Indragiri River were between 1.72 to 7.14 Φ anddominated by medium class of silt and coarse silt. The sorting score were between0.58 to 2.10 Φ and dominated by a poorly sorted classification. Skewnes valueindicates the estuary area described that the coarse sediments particles and areas farfrom the mouth of the river showed a trend of fine sediment particles.Keyword: sediment, mud and sand

ANALISIS SEDIMENTASI DI MUARA SUNGAI ROKAN PROVINSI RIAU Jannata Rahmad Putra; Rifardi Rifardi; Mubarak Mubarak
Berkala Perikanan Terubuk Vol 44, No 1 (2016): Februari 2016
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

The research were conducted in River estuary of Rokan, Riau Province on Mei 2014. Sedimentation analysis were investigated by various method i.e, sedimen grain-size analysis, Total suspended solid analysis, mechanism of particle disseminated, river’s sediment transport analysis, longshore sediment transport analysis, coastline chance analysis and absolute sedimentation velocity. The research was aim to explained sedimentation procces covered mechanism of sediment transport and sedimentation rate, and then could be able to gave the solution for preventive study of River estuary of Rokan Sedimetation. The result of grain-size analysis showed that mean size were dominated by find sand, sorted by poorly sorted. The disseminated of sediment in deep water was tended to very fine skewed dan skin-deep was very coarse skewed. Mechanism of disseminated particle result when tide, find sand sediment was transport as 128,52 m to the south-east in 23,33 minute. On the contrary to the northwest as 88,10 m in 16 minute. Very find sand was transport as 82,59 m to the south-east in 15 minute at tide and on the contrary to the northwest as 67,12 m in 11,27 minute. Total Sediment Transport Formulae showed 137.023 m3/year of sediment transport was occurred, while longshore sediment transport was 33.616.808,53 m3/year at the River estuary of Rokan. The coastline chance showed addition of land at the estuary was 240.096.862,77 m2 , accretion was 280.492.425,46 m2, and abration was 27,935,195.86 m2. From sediment total calculation in a year comparing by 60 years accretion showed, the absoluted sedimentation velocity was 0,19 cm/year. It was low, so that concluded the contriction of estuary by accretion.

ANALYSIS OF SEDIMENTATION RATES IN THE ESTUARY WATERS OF THE BOKOR RIVER, KEPULAUAN MERANTI DISTRICT, RIAU PROVINCE Anggie Agustian; Rifardi Rifardi; Elizal Elizal
Berkala Perikanan Terubuk Vol 48, No 3 (2020): November
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/terubuk.48.3.558-567

Penelitian ini bertujuan untuk mempelajari jenis sedimen dan laju sedimentasi yang terjadi di perairan pantai Muara Sungai Bokor. Penelitian ini menggunakan metode survey dimana sampel diambil dari enam lokasi yang dipilih secara purposif, kemudian semua sampel dianalisis di laboratorium ilmu kelautan. Hasil penelitian menunjukkan bahwa laju sedimentasi di Muara Sungai Bokor tinggi yakni antara 14,267 – 16,520 mm/tahun. Selanjutnya, akumulasi sedimentasi yang terjadi berkisar antara 0,0142 – 0,0165 m3/tahun dan 47.083 – 54.006 kg/ha/tahun dan jenis sedimennya didominasi oleh lumpur berpasir. Tingginya laju sedimentasi di perairan ini barangkali berkaitan erat dengan tingginya nilai TSS pada kolom air di mulut muara, faktor oseanografis dan tingginya pemanfaatan lahan serta aktivitas masyarakat di kawasan pesisir daerah ini. Adapun besaran nilai TSS dimaksud berkisar antara 136 – 398 mg/l.

THE FEASIBILITY ANALYSIS OF THE FLOATING NET CAGE BUSINESS BY REVIEWING THE ECONOMIC CALCULATIONS AND CARRYING CAPACITY OF THE KAMPAR RIVER ENVIRONMENT IN BULUHCINA VILLAGE, SIAK HULU DISTRICT, KAMPAR REGENCY Yudho Harjoyudanto; Rifardi Rifardi; Windarti Windarti; Andri Hendrizal; Rina D'rita Sibagariang
Berkala Perikanan Terubuk Vol 47, No 3 (2019): NOVEMBER 2019
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

In recent years, many net cages for aquaculture activities, especially for culturing Wallago leeri and Mystus numerus are placed along the Kampar River, especially in the Buluhcina Village. The remain of fish feed, namely rotten chicken flesh have polluted the water. This study aimed to identify the cage culture profile; to analyze the feasibility of the business and the carrying capacity of the environment. This research was conducted in August 2016 – March 2017. There are three observation stations, Station 1 (before the cage area), Station 2 (the cage area) and Station 3 (after the cage area). Sampling was conducted once. The length of the river is 1.4 Km and 594 single unit net cages are placed along 1,2 Km river. Among the cages, 570 units (96% )are used to the culture of W. leeri, 19 units (3.2%) for M. numerus and the rest, 3 units are for rearing Pangasius sp. and Oreochromis niloticus (1 unit). The carrying capacity of the waters is 496.1 tons/year. The current annual production of W. leeri is 228 tons/year, it is less than the maximum potency. It is predicted that the culture can be increased by 258.5 ton/year or 646 cages. The recent RCR value is 1.120, indicates that this business is profitable and it could be continued.

CARRYING CAPACITY SERVICES BASED ON CLEAN WATER SUPPLY ECOSYSTEM IN SOUTH TAPANULI DISTRICT Ambosa Hidayat; Rifardi Rifardi; Suwondo Suwondo
Berkala Perikanan Terubuk Vol 48, No 3 (2020): November
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/terubuk.48.3.525-535

Environmental carrying capacity with the other methods has been used by other countries especially developed countries. One of method was based on ecosystem services which developed by MEA in 2005. This approach looked environmental carrying capacity through benefits that people could get on it. In the other hand, environmental carrying capacity based on ecosystem service could integrated in spatial urban regional planning or other developing plan. Ecosystem services are benefits that humans getfrom ecosystems. Sustainable development era has increased demand on ecosystem services information to be incorporated into various development policies and planning. This research Purpose to assessing spatial distribution of ecosystem services for clean water supply as basis of management for sustainable resources. The research method was an ecosystem service approach using two estimating variables, land cover and ecoregion as the landscape ecosystem. Each estimator variables assessed of Ecosystem services by expert judgment with coefficient values. This research specifically discusses the comparison of the results of maps of ecosystem services formulated through experts' judgement on land use based proxy and a combination of land cover and ecoregion. We use Analytical Hierarchy Process (AHP) with pairwise comparison method to asssess the potential of ecosystem services from land cover and ecoregion. The case study area is south tapanuli district, while the type of ecosystem services analyzed is type of clean water supply. The results of the calculations show that the index of ecosystem services resulting from acombination of land cover and ecoregion produces a more accurate map of ecosystem services with qualitative information. The coefficient values were processed and analyzed by using GIS technique to produces spatial distribution of Ecosystem Services values which were divided into five classes of the ecosystem services : very high, high, medium, low, and very low. The results showed that south tapanuli district have great potentials to provider the ecosystem services for clean water supply with medium to very high class value of ecosystem services (36,17% of the South Tapanuli District).

Co-Authors ', Mubarak ', Rosshalia ', Zulkifli Achmad Hidir Aditya Dharma Putra Afrizal Tanjung Afrizal Tanjung Afrizal Tanjung Afrizam ' Agusti, Dinda Roanna Ahmad Nurhuda Ahmad, Alianisa Alan Nuari Sipahutar Ambosa Hidayat Aminuyati Andre Rangga Andri Hendrizal Andrian, Fikri Andriani, Fikri Anggie Agustian Anna Lilian Annisa Al-Qhoshashi Aras Mulyadi Arif Hidayatullah Arif Teguh Satria Arinalhaq, Aminah Aristi, Fiona Arnes, Arnes Aslim Rasyad Asrori ' Athhary, Dhiva Danaya Basiluddin, Fadhlan Bima Wahyu Nugroho Bintal Amin Chairunisa Rachmani, Chairunisa Dedek Susanto Dendy Ariandi Dessy Yoswaty Dimas Sochi Satya Mendrofa Dinda Trie K Hayati Dinda Trie K Hayati Edwar Rufli Edy J Girsang Efriyeldi, Efriyeldi Elisa Paramita Elizal Elizal Elizal, Elizal Eryandi sitanggang Etty Riani Fairuzia, Putri Marwah Fajri, Ferli Falsabila Widuri Fatchur Rochman Fathurrahman, Febri Fauzi, Manyuk Feliatra Fertikasari, Indah Fifi Sanora Firmansyah Firmansyah Gita Purnama Sari Gita Purnama Sari, Gita Purnama Hafiza Tartila Isty Hamidah Dasno Vera Harahap, Anugerah Ramadhan Hayen, Nabilla Syima Putri Nur Hendra Yosep Siburian Heru Purnomo Hutapea, Yeru Daniel Octryan Ilham Ilahi Imron Imron Indah Fertikasari Irvina Nurachmi Jamhari Jamhari Jannata Rahmad Putra Jasman ' Joko Samiaji Julyana Julyana Kevin Anandika Dwi Putra Lydia Anna Oliza M Lubis M. Iqbal A Maatitawaer, Natasya Debora C Marganda Simamora Maulana, Fariz Melas, Febi Betania Monalisa Hasibuan Mubarak ' Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Mubarok, Ihsan Dwi Muhammad Aditya Pradana Muhammad Fadhli Muhammad Hidayatuddin Muhammad Rizki Fadly Musrifin Galib Musrifin Ghalib Musrifin, Musrifin Nabilla Syima Putri Nur Hayen Nanci Aulia Safitri Naomi Simanjuntak Paramita, Elisa Pohan, Rizal Suardiman Pradana, Muhammad Aditya Pranata, Eryc Prastya Bayu Afrian Putra, Kevin Anandika Dwi Rahmi Relva Rambe, Pahala Roy Ramot S Hutasoit, Ramot S Rasoel Hamidy Reza Ambar Wati Rica Purnama Sari Rina D'rita Sibagariang Rina Susanti Rinu Maido Rio Syahputra Robileo Agus Romauli, Junita Romel Kefriansa Putra Romi Fadli Syahputra Sampe Harahap Sanora, Fifi Siburian, Hendra Yosep Sidabalok, Westy Yulia Sihombing, Tumpal Simanjuntak, Naomi Sipahutar, Alan Nuari Siti Ramlah Hasibuan Sitorus, Gideon Dody Tama Situmorang, Nesi Silvia Sofyan Husein Siregar Sri Aslinda, Sri Sri Fitria Retnawaty Sri Wulandari Suardi Tarumun Suci Monika Putri Sutikno, Sigit suwondo suwondo Syafruddin Nasution Syahminan Syahminan Syahril Nedi Syaiful Anwar Syaputra, Eldy Syofyan Siregar Thamrin Thamrin Thamrin Thamrin Tri Radiko Felik Usman Muhammad Tang Visius Uracha Sisochi Wau Wahyu Novra Wanda Wardana, Rangga Wati, Reza Ambar Widuri, Falsabila Windarti Windarti Yeeri Badrun Yenica Roza Yogie Novri Yusda Yoskar Kadarisman Yudho Harjoyudanto Yusmarini Yusmarini Yusni Ikhwan Siregar Zulkifli Zulkifli Zulkifli Zulkifli Zulkifli Zulkifli Zulkifli Zulkifli

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