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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Zona

Rifardi Rifardi

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Author-ID : 2954676

Earth & Planetary Sciences Environmental Science

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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.

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).

HUBUNGAN KARAKTERISTIK SEDIMEN DENGAN HABITAT PENELURAN PENYU DI PANTAI TIRAM, PANTAI KARAMBIA AMPEK, DAN PANTAI GOSONG KABUPATEN PADANG PARIAMAN PROVINSI SUMATERA BARAT Rahmi Relva; Rifardi Rifardi; Elizal Elizal
Berkala Perikanan Terubuk Vol 48, No 2 (2020): Juli 2020
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/terubuk.48.2.421-433

This research was conducted on 27 April-30 May 2019 at Tiram Beach, Karambia Ampek Beach and Gosong Beach, Padang Pariaman Regency, West Sumatra Province. This study aims to determine the relationship between sediment grain size and the number of turtle eggs. The method used in this research is purposive sampling. The sampling location is divided into 3 stations, each station is divided into 5 sampling points in order to obtain 15 sampling points, of which the fifteen sampling points are the usual nesting sites for turtles. Sediment samples were taken approximately 500 grams, put in a plastic bag, then labeled and then the sample was taken to the laboratory for analysis. The procedure for analyzing the sediment grains for sand and gravel fractions used the wet sieving method, for the sludge fraction was analyzed using the pipette method. The results from the wet sieving method and the pipette method were combined and the mean size (Mz) was obtained. Measurement data were analyzed using linear regression analysis, then correlation and regression analysis to determine the form of the relationship and the strength of the relationship between two or more variables. Sea turtles will lay eggs, namely the mean size ranges from 1.13-1.8 Ø. The coefficient of determination (R2) = 0.53 and the correlation coefficient r = 0.73. This means that the coefficient of determination shows the average diameter (mean size) affects 53% of the number of turtle eggs, while the other 47% is influenced by other factors, for example vegetation around the coast..

KARAKTERISTIK DAN POLA SEBARAN SEDIMEN PERAIRAN SELAT RUPAT BAGIAN TIMUR Edy J Girsang; Rifardi Rifardi
Berkala Perikanan Terubuk Vol 42, No 1 (2014): Februari 2014
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

The study was conducted in June 2013 in the eastern waters of RupatStrait. The purpose of the study was to determine the depositional environmentand environmental changes along Rupat Straitbased on analysis of surfacesediment, suspended sediment concentration, and sediment accumulation value.The method used was survey method. Location of the studywas divided into 15sampling points based onthe pattern oftidal currents and source materials into thewater. The results showed that the study area was dominated by fine s andsediments with as and sediment type. The average concentration of suspendedsolids in coastal waters of Sumatra washigherthan that of the Rupat. The waters ofthe eastern part of the Rupat Strait received sediment from the coastal erosion andsupply of material from the two major rivers; i.e. Dumai River and Masjid River.Characteristics and distribution patterns in marine sediments were influenced bythe character of the sea bottom, the pattern of tidal currents and waves .Keywords : Charackteristics of Sediments, Surface Sediment, Rupat Strait.

Lingkungan Pengendapan Perairan Selatan Estuaria Bagan dan Sekitarnya Pantai Timur Sumatera Indonesia Rifardi Rifardi; Edwar Rufli; Andre Rangga; M Lubis; Yenica Roza; Putri Nilam Sari
Jurnal Ilmu Lingkungan Vol 5, No 1 (2011): Jurnal Ilmu Lingkungan
Publisher : Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jil.5.1.p.66-81

The main purpose of this study is to clarify the relation between characteristics of sediments andenvironmental condition based on the analysis of surface sediment samples and total suspendedsediments from the Southern of Bagan Estuary which is located on the East Coast of SumateraIsland, Indonesia. Surface sediment samples and total suspended sediments were collected at 21stations using sediment sampler and van dorm sampler, respectively, in June 2010. The sampleswere analyzed by various analytical approaches i.e. mechanical grain size analysis, ignitionloss method, bulk chemical analysis using atomic absorption spectrometer and sand-graincomposition analysis. In general, the estuary area is characterized by finer sediments (medium-grained sand), by the lower values of organic matters (less than10%), and by the higher contentof Fe and Al per non calcareous clastic content, which is an index of terrigenous material inputrespectively. Concentration of total suspended sediment near bottom is higher than that ofsurface water, indicating sediments turbulented by strong current system. Judging from thedistribution pattern of the Fe and K contents at surface sediment, terrigenous materials weretransported northwestward along the coast of Pekaitan Village and of Barkey Island by strongebb current. Contrastingly, terrigenous materials were transported southeastward along thearea located between coast of Pekaitan Village and of Barkey Island by strong tide current.Geographical distribution of sand grain composition (lithogenous) strongly indicate thatterrigenous materials derived from the hinterland of Sumatera Island discharged through RokanRiver to the Southern of Bagan Estuary. In addition to, terrigenous materials are also resultedfrom coast erosion of Pekaitan Village and of Barkey Island, and turbulented sediments.

PEMODELAN PERUBAHAN PENGGUNAAN LAHAN DI KABUPATEN KAMPAR Muhammad Fadhli; Rifardi Rifardi; Suardi Tarumun
Jurnal Ilmu Lingkungan Vol 14, No 1 (2020): Jurnal Ilmu Lingkungan
Publisher : Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jil.14.1.p.52-65

This study aims to identify the types of land use and patterns of land use change in Kampar District. This study uses a survey method with visual interpretation techniques Landsat imagery in 1998,2008,2018 using geographic information systems (GIS). The results showed that 12 types of land use in Kampar district in 1998-2008-2018 were: 1) forest, 2) plantation forest, 3) plantation, 4) mixed plantation, 5) dry land agriculture, 6) rice field, 7 ) shrubs, 8) built up land, 9) mines, 10) open, 11) ponds, and 12) bodies of water. The patterns of land use change in Kampar Regency in the period 1998-2008-2018 were 187 patterns. There are 2 types of patterns of change, namely 1) the pattern of change from vegetated land use to vegetated land use and 2) the pattern of changes in the use of vegetated to non-vegetated land. The first type with the most dominant pattern based on the area of change include: 1) forests - plantations - plantations, 2) mixed plantations - plantations - plantations 3) Forests – plantation forests - plantation forests. The second type with a pattern of change based on area includes: 1) forest – forest - open, 2) mixed plantation - built up land – built up land, 3) mixed plantation - mixed plantation - mine.

DAYA TAMPUNG SUNGAI TAKUANA TERHADAP BEBAN PENCEMAR SEKITAR TAMAN HUTAN RAKYAT SULTAN SYARIF HASIM Marganda Simamora; Rifardi Rifardi; Manyuk Fauzi
Jurnal Ilmu Lingkungan Vol 12, No 1 (2018): Jurnal Ilmu Lingkungan
Publisher : Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jil.12.1.p.70-82

This study aims to analyze the relationship of land use change or changes in land cover with the water quality of the River Takuana and the relationship of pollutant load with the capacity of the Takuana River. River carrying capacity is obtained by the Mass Balance method on the parameters of BOD, COD, DO, TSS, NH3-N, pH and Temperature. Sampling was carried out at three points based on the division of the river. The results showed that there was a relationship between land conversion to river water quality as evidenced by the statistical calculation of the t-hit value indicating that the significance of TSS was 1.7 <0.05, the significance was 0.017 <0.05, which means that TDS and TSS had no significant effect on land conversion while BOD, DO, COD, pH. temperature and NH3N have a relationship with the extent of the function, because the significance of the results is smaller or equal to 0.05 BOD the significance is 0.013 <0.05, DO significance is 0.030 <0.05, the significance temperature is 0.017 <0.05 and NH3N 0.052 <0.05. River carrying capacity is influenced by the amount of pollutants and river water rate while river pollutant load is influenced by the amount of pollutants and water discharge. So the higher the rate of water also affects the river water discharge, based on the calculation of pollutant load and carrying capacity shows that there is a relationship that the amount of pollutant load for the overall parameters of pollutants exceeds the capacity of polluting the Takuana River. for TSS parameters the amount of pollutant load is 57,600 mg / sec and TSS capacity is 37.69 mg / liter, but still meets the class II quality criteria based on Government Regulation No. 82 of 2001 of 50 Mg / liter. TDS pollutant load is 30,430 mg / second, TDS capacity is 21.52 mg / liter but pollutant load still meets class II quality criteria, DO pollutant load is high but still meets class II quality criteria. For high pollutant loads COD, BOD and NH3-N result in lower capacity and have exceeded the class II quality criteria according to GovernmentRegulation No. 82 of 2001. The higher the pollutant load that enters the river, resulting in lower river capacity

Co-Authors Afrizal Tanjung Ambosa Hidayat Andre Rangga Andri Hendrizal Anggie Agustian Annisa Al-Qhoshashi Aras Mulyadi Bima Wahyu Nugroho Bintal Amin Edwar Rufli Edy J Girsang Efriyeldi, Efriyeldi Elizal, Elizal Hafiza Tartila Isty Hamidah Dasno Vera Imron Imron Indah Fertikasari Jamhari Jamhari Joko Samiaji Julyana Julyana M Lubis Manyuk Fauzi Marganda Simamora Mubarak Mubarak Muhammad Fadhli Muhammad Rizki Fadly Musrifin Galib Prastya Bayu Afrian Rahmi Relva Rina D'rita Sibagariang Rio Syahputra Suardi Tarumun Suci Monika Putri suwondo suwondo Thamrin Thamrin Tri Radiko Felik Windarti Windarti Yenica Roza Yudho Harjoyudanto Yusni Ikhwan Siregar

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