Rifardi Rifardi, Rifardi
Program Studi Ilmu Lingkungan Universitas Riau, Kampus UNRI Gobah

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Analisis Bioekonomi Sumberdaya Perikanan Tangkap Kabupaten Kepulauan Meranti Provinsi Riau Syaputra, Eldy; Rifardi, Rifardi; Nasution, Syafruddin
Jurnal Perikanan dan Kelautan Vol 21, No 2 (2016)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.21.2.1-8

Abstract

This study aims to determine bioekeonomi capture fisheries in the Islands District Meranti (Maximum Sustainable Yield, Maximum Economic Yield, and Open Access), to assess the status of fisheries in the Islands Meranti Regency using models Schaefer, calculating the profitability of fishermen during fishing operations take place. This research was conducted in June - August 2015 in the village of Sungai Gayung Kiri Rangsang Subdistrict, village of Tanjung Kedabu Rangsang Pesisir Subdistrict and village of Telesung Rangsang Pesisir Subdistrict in Meranti Islands Regency. The method used in this research is survey method with interview and observation, while data analysis using bio-economic modeling. The results of this study suggests that the benefits of fishing effort during the arrest operation took place most largely produced from the mackerel and the status of the fishery in Meranti Islands Regency has achieved economic overfishing.
The Effect of Changes in The Shoreline of The Sea Law Implementation in West Rangsang Subdistrict, Kepulauan Meranti District Siburian, Hendra Yosep; Rifardi, Rifardi; Tanjung, Afrizal
Jurnal Perikanan dan Kelautan Vol 25, No 1 (2020)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.25.1.53-63

Abstract

Penelitian ini dilakukan pada bulan Oktober 2018 di Perairan Pantai Rangsang Barat, Kabupaten Kepulauan Meranti, Provinsi Riau. Penelitian ini bertujuan untuk mengetahui perubahan garis pantai yang  terjadi di Kecamatan Rangsang Barat dalam rentang waktu 10 tahun terakhir dan implementasi hukum laut tentang pengaturan permasalahan perubahan garis pantai di Kecamatan Rangsang Barat Kabupaten Kepulauan Meranti Provinsi Riau. Hasil pengolahan citra Landsat 5 dan Landsat 8 dengan besar Perubahan garis pantai di Desa Melai adalah 55,56 m (akresi), di Desa Kedabu Rapat sebanyak 50,94 m (abrasi) dan di Desa Bungur sebesar 42,10 m (abrasi). Implementasi hukum laut menurut pasal 15 UNCLOS 1982 dalam penetapan wilayah laut teritorial yang berdampingan dengan negara lain memutuskan uu no 2 tahun 1971 tentang penetapan batas wilayah kedua negara di Selat Malaka. Penentuan titik koordinat tersebut ditetapkan berdasarkan Garis Pangkal masing-masing negara. Dengan diberlakukannya Konvensi Hukum Laut Internasional 1982 sehingga ditetapkan Peraturan pemerintah Republik Indonesia no 38 tahun 2002 tentang daftar koordinat geografis titik-titik garis pangkal kepulauan Indonesia. Dengan penetapan titik koordinat geografis permasalahan pada perubahan garis pantai negara Indonesia dan Malaysia akibat dari abrasi dan akresi dapat diselasaikan dengan memperhatikan titik koordinat geografis pada pulau Rangsang.
Analisis Foraminifera Bentik pada Sedimen Terumbu Karang di Pulau Pandan Kota Padang Sumatera Barat Arinalhaq, Aminah; Rifardi, Rifardi; Elizal, Elizal
Jurnal Perikanan dan Kelautan Vol 22, No 1 (2017)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.22.1.1-8

Abstract

Foraminifera merupakan salah satu ordo dari protozoa yang bersel tunggal, hidup padalingkungan perairan terutama laut yang dapat dijadikan bioindikator kondisi lingkunganterumbu karang melalui indeks sederhana bernama FORAM Index. Penelitian inibertujuan untuk mengetahui tingkat kelayakan lingkungan terumbu karang berdasarkanforaminifera bentik dilihat dari nilai FORAM Index, Penelitian ini menggunakan metodesurvei pada pengambilan sampel sedimen dan pengukuran parameter lingkunganyang telah dilakukan pada bulan November 2016. Analisis foraminifera meliputi tahappreparasi sampel, kemudian sampel di jentik maksimal 300 individu, dengan dua kalipengulangan, sampel hasil penjentikan dikoleksi untuk identifikasi dengan melihatstruktur morfologi cangkang foraminifera. Hasil dari penelitian ini ditemukan 4 genusforaminifera bentik bioindikator kondisi perairan terumbu karang. Kondisi perairanterumbu karang di gugusan Pulau Pandan berdasarkan FORAM Index (FI) nilainyaberkisar antara 5,31 - 5,98, nilai ini memberi indikasi bahwa perairan sangat kondusifuntuk lingkungan pertumbuhan terumbu karang dicirikan oleh kehadiran Amphisteginanamun memperlihatkan kondisi lingkungan yang mulai menurun dan dicirikan olehkehadiran Quinqueloculina
CHARACTERISTICS SEDIMENT IN THE ULAKAN TAPAKIS WATER OF PADANG PARIAMAN DISTRICT WEST SUMATERA PROVINCE Fertikasari, Indah; Rifardi, Rifardi; Elizal, Elizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

AbtracThe study of the distribution of sedimentary characteristics in Ulakan Tapakis waters aimed at sediment deposition environmental conditions based on sedimentary characteristics. Sediment sampling was conducted at nine sampling points using purposive sampling technique.Analysis of the sediment fraction was carried out using the wet sieveand pipette methods. The results of the study the Ulakan Tapakis waters had 4 types of sediment namely: sand, muddy sand, sandy mud and mud,which is dominated by sandy mud. The sedimentary statistical parameters showed the value of mean diameter (mean size) range from 0,23-5,73ø with the clasification of coarse sand to medium silt. Skewness values range from -0,90-0,42ø with the clasification of  very negative skewed to very positive skewed. The values of sorting ranges from 2,04-2,53ø with the clasification of very poorly sorted. The value of kurtosis range from 0,47-9,31ø with the clasification of very platikurtik to leptokurtik extreme, indicate the waters under the influence of current conditions that tend to be unstable and the number of anthropogenic aktivities. Keyword: Sedimentary Characteristics, Sediment statistics, Ulakan Tapakis 
Relation of Accumulated Sediment with Coral Reef Cover in the Lagoi Waters Bintan Regency Kepulauan Riau Province Sidabalok, Westy Yulia; Rifardi, Rifardi; Elizal, Elizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACT This research was conducted in Lagoi Waters Banyan Tree Bintan Region to observe  effect accumulated sediment on coral. Three stations were selected forthe measurement of accumulated sediment was conducted using sediment traps which is apllied in the station of coral observation for 21 days. Point Intercept Transect (PIT) was used for the observation of coral reef. Regression analyses was applied clarify the correlation between accumulated sediment  and coral reef. The result of this study showed that the rate of accumulated sediment  in all observation stations ranged from 1.49 – 2.90 mg/cm2/day. The effect can be categorized as low to medium. The condition of coral reef in Lagoi Waters Banyan Tree Bintan Region is classified in good, indicated by  percentage of coral cover in observation stations ranged between 50-74%. The result of regression analysis showed that the accumulated has negative impact of life coral reef in Lagoi Waters Banyan Tree Bintan Region.Keywords : Accumulated sediment, Coral reef, Lagoi Waters.
DISTRIBUTION OF ORGANIC MATTER IN SEDIMENTS OF SUNGAI MESJIDESTUARY, PURNAMA MARINE STATION, DUMAI CITY, RIAU PROVINCE Pranata, Eryc; Rifardi, Rifardi; Musrifin, Musrifin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACK This research was conducted from February to March 2019 which is located in the estuary waters of the Sungai MesjidPurnama Marine Station, Dumai City, Riau Province. Data analysis of organic matter was carried out at the Physical Oceanography Laboratory of Marine SciencesDepartment, Faculty of Fisheries and Marine, University Of Riau. This study aims to determine the distribution of organic matter in sediments in estuary areas that are affected by 2 water masses,currents and semidiurnal tidal analysis distribution of organic matter showed that the distribution of organic matter content at low tide ranged from 4.90 to 16.50 %. The results show that the waterflow of Sungai  Mesjid toPurnama coast there are mangrove ecosystems.During tidal events currents from Sungai Mesjid meet with the mass of water from the RupatStrait. Purnama. Key words :Organic Matter, Sungai Mesjid,Mangrove, Currents, Tides
Waves and Tidal Current on High Tide (Spring Tide Condition) in Rupat Strait Riau Province Wati, Reza Ambar; Rifardi, Rifardi; Mubarak, Mubarak
Jurnal Perikanan dan Kelautan Vol 25, No 1 (2020)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.25.1.1-5

Abstract

This study was conducted from  November 2017 in Rupat Strait, Riau Province. The analysis of model was done in Laboratorium of Physical Oceanography, Departement of  Marine Science, Faculty of Fisheries and Marine, University of Riau. The research aims to understand the wave and tidal current on high tide (spring tide condition) in Rupat Strait. The significant wave height is about 0.12-0.90 m/s. The current speed  is about 0.18-0.78 m/s. The result of the study indicate that at spring tide condition, the tidal current from Malaka Strait flows up to Rupat Strait by northern and eastern part of Rupat Strait. This condition  influences distribution of sediments in Rupat Strait the cause of the changes coastline
Sediment Suspended Concentration (SSC) Profile in Padang River Estuary Area Bandar Khalifah Sub District Serdang Bedagai Regency North Sumatera Province Hutapea, Yeru Daniel Octryan; Rifardi, Rifardi; Elizal, Elizal
Jurnal Perikanan dan Kelautan Vol 24, No 1 (2019)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.24.1.52-60

Abstract

SSC (Sediment Suspended Concentration) is the concentration of suspended sediment. This research was conducted in June 2018 in the Muara Sungai Padang area, Bandar Khalifah District, Serdang Bedagai Regency, North Sumatra Province. This research aims to describe the distribution of vertical and horizontal SSC suspended sediments and the factors that influence them in Padang river estuary  area, Bandar Khalifah District, North Sumatra Province. The method used in this research is the survey method and determining the location of sampling by purposive sampling. Measurement of water quality parameters is carried out in situ, namely temperature, salinity, pH, depth, current speed, and brightness. The results of the study of the distribution of suspended sediments in the waters of the Padang river can be concluded that the pattern of the distribution of suspended sediments when the tide moves towards the upper reaches of the river while at low tide moves towards the sea, namely the waters of the Malacca Strait which is influenced by currents. the largest suspended sediment concentration at tide to low tide is at the sampling point 1 which is 179 mg / l and recedes to pairs at sampling point 1 which is 121 mg / l.
Temporal Study of TSS (Total Suspended Solid) Around Porong River Estuary Due To the Influence of Lapindo Mud Based On Landsat 8 OLI Satellite Imagery Mubarok, Ihsan Dwi; Rifardi, Rifardi; Tanjung, Afrizal
Jurnal Perikanan dan Kelautan Vol 24, No 2 (2019)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.24.2.119-129

Abstract

This research was conducted in April 2019 to determined TSS concentrations using Landsat 8 OLI Satellite imagery and of to the coefficient TSS concentrations at period of before and after Lapindo mudflow event using Landsat 8 OLI satellite imagery in Porong River estuary Sidoarjo Regency East Java Province. TSS from 25 sampling points with 3 replication were taken from the estuary. The result showed that fluctuation of TSS occured around Porong River estuary before and after Lapindo mudflow event from 2000-2019. Algoritm of Budhiman (2004) got the best result for analyst TSS concentration around Porong River estuary. The highest concentration was in estuary. In 2008, the concentration in estuary was 216,07 mg/l. (R2 =0,915 ; r = 0,957). The Development of Algoritm of Budhiman (2004) produced formula of TSS (mg/l) = -6.7625 + (1.2129 * (8.1429 * (Exp (23.704 * 0.94 * Band-Red))))
Characteristic of Sediment Verticaly on Abrasion Beach in Rupat Strait Riau Province Rochman, Fatchur; Rifardi, Rifardi; Ghalib, Musrifin
Jurnal Perikanan dan Kelautan Vol 23, No 2 (2018)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.23.2.47-53

Abstract

The research has been investigated on November 2017 which located on Rupat Strait, Riau Province. The purpose of this research to conducted character alteration vertically on sediment. 2 sampling point was tooken using 120 cm pipe. Were the result show that sediment dominated by mud. Based on shepard triangle there is 3 kind of sediment which is sandy mud, muddy sand and mud. The mean size (Mz) result for station I and II around 2,97-6,13∅ and contains 4 fraction sediment : medium silt which mean size (Mz) 5,03-6,00, corse silt which mean size (Mz) 4,07-5,00∅, fine sand which mean size (Mz) 2,97∅, and fine silt which mean size (Mz) 6,03-6,13∅.