Articles

SEBARAN MUATAN PADATAN TERSUSPENSI DAN KELIMPAHAN FITOPLANKTON DI PERAIRAN MUARA SUNGAI PORONG KABUPATEN SIDOARJO Wisha, Ulung Jantama; Yusuf, Muh.; Maslukah, Lilik
Journal of Oceanography Vol 3, No 3 (2014)
Publisher : Journal of Oceanography

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Abstract

AbstrakPembuangan limbah dan lumpur ke Sungai Porong diduga akan berdampak bagi lingkungan sekitarnya, khususnya meningkatnya konsentrasi Muatan Padatan Tersuspensi (MPT) dan mempengaruhi sebaran fitoplankton di wilayah tersebut. Tujuan dari dilakukannya penelitian ini adalah untuk mengetahui konsentrasi muatan padatan tersuspensi, kekeruhan dan kelimpahan fitoplankton di perairan muara Sungai Porong, Kabupaten Sidoarjo. Metode penelitian yang digunakan adalah metode deskriptif. Data yang dikumpulkan sebagai variable ukur adalah muatan padatan tersuspensi, kekeruhan, kelimpahan fitoplankton dan kecepatan serta arah arus. Variabel pendukung meliputi data arah dan kecepatan arus dan peta bathimetri wilayah muara Sungai Porong. Data yang diperoleh selanjutnya dianalisis menggunakan program Arc GIS 10, sehingga menghasilkan output berupa distribusi spasial. Konsentrasi muatan padatan tersuspensi 542-885 mg/l. konsentrasi kekeruhan 3.7-20.5 NTU. Kelimpahan fitoplankton 153-238 ind/l. Berdasarkan data tersebut dapat diketahui bahwa sebaran muatan padatan tersuspensi dan kekeruhan memiliki kaitan dengan kelimpahan fitoplankton pada saat surut, meskipun pada kuantitas yang tidak selalu sama. Arah sebaran bergerak ke arah Timur atau menjauhi muara sungai.
ANALISIS JULAT PASANG SURUT (TIDAL RANGE) DAN PENGARUHNYA TERHADAP SEBARAN TOTAL SEDIMEN TERSUSPENSI (TSS) DI PERAIRAN TELUK PARE Wisha, Ulung Jantama; Heriati, Aida
Jurnal Kelautan Vol 9, No 1: April (2016)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v9i1.1066

Abstract

ANALYSIS OF TIDAL RANGE AND ITS EFFECT ON DISTRIBUTION OF TOTAL SUSPENDED SOLID (TSS) IN THE PARE BAY WATERSPare Bay conditions is closely related to the mechanism of circulation in Makasar Strait. One of the problems that occur in Pare Bay waters is increased turbidity and low dynamics of transport inside the bay, which caused silting in some parts of the bay. The aim of this study was to determine tidal range characteristics and the influence of suspended sediment distribution as analysis of the sedimentation process and siltation at Pare bay. Descriptive quantitative method was used and the survey location was based on purposive sampling method. Tidal type in Pare Bay water was mix mainly semidiurnal tides with Formzahl Value was 0.895. The value of the water level below the lowest tide (Z0) was 1036.44 cm. Mean sea level (MSL) value was 1107.97 cm. The vertical datum of MHHWS and MLLWS were 1143.47 cm and 1072.47 cm. Tidal range cycle in spring condition was 102-129,56 cm bigger than cycle in neap condition ranged from 55.53-82.47 cm. TSS concentrations ranged from 0-7.0 mg/L in the surface and ranged from 0- 10.0 mg/L in 5 meters depth. At high tide down, sediment was settling and at the time of high tide, sediment mixed back.Keywords: Pare Bay, suspended solid, tidal range, tide.ABSTRAKKondisi perairan di Teluk Pare sangat berkaitan dengan mekanisme sirkulasi di Selat Makasar, Permasalahan yang terjadi di Teluk Pare salah satunya adalah tingginya tingkat kekeruhan dan rendahnya dinamika transport didalam teluk yang menyebabkan pendangkalan di beberapa bagian teluk. Tujuan dari penelitian ini adalah mengetahui karakteristik julat pasang surut dan pengaruhnya terhadap sebaran sedimen tersuspensi sebagai analisis proses sedimentasi dan pendangkalan di perairan Teluk Pare. Metode penelitian yang digunakan adalah deskriptif kuantitatif, metode penentuan lokasi titik pengambilan sampel air yaitu metode purposive sampling. Tipe pasang surut Teluk Pare adalah campuran condong harian ganda dengan nilai bilangan formzahl sebesar 0,895. Nilai muka air dibawah surut terendah (Z0)  sebesar 1036,44 cm. Nilai mean sea level (MSL) sebesar 1107,97 cm. Datum vertikal MHHWS dan MLLWS memiliki nilai 1143, 47 cm dan 1072,47 cm. Julat pasang (tidal range) siklusan saat siklus pasang purnama yaitu 102–129,56 cm lebih besar daripada siklus pasang perbani yang berkisar 55,53-82,47 cm. Konsentrasi TSS berkisar antara 0-7,0 mg/L pada permukaan dan berkisar antara 0–10 mg/L pada kedalaman 5 meter, pada saat pasang turun sedimen sudah mulai mengendap dan pada saat pasang naik sedimen teraduk kembali.Kata kunci: julat pasang, pasang surut, sedimen tersuspensi, Teluk Pare.
Hydrodynamics Banten Bay During Transitional Seasons (August-September) (Hidrodinamika Perairan Teluk Banten Pada Musim Peralihan (Agustus–September)) Wisha, Ulung Jantama; Husrin, Semeidi; Prihantono, Joko
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 20, No 2 (2015): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Perairan Teluk Banten merupakan wilayah yang sibuk dengan aktivitas wisata bahari, industri, permukiman dan lain-lain. Kondisi tersebut dapat menimbulkan dampak-dampak negatif seperti pencemaran, erosi, dan masalah lingkungan lainya. Pemahaman mengenai kondisi hidro-oseanografi sangat penting sebagai langkah untuk pengelolaan dan perlindungan wilayah pesisir dan laut. Tujuan dari penelitian ini untuk mengetahui karakteristik hidrodinamika di Perairan Teluk Banten pada musim peralihan (Agustus - September) berdasarkan data primer (data satu bulan arus, pasang surut, suhu) dan data sekunder (batimetri, kualitas air dan nutrient). Simulasi model diolah menggunakan MIKE 21, didukung dengan penggunaan CD-Oceanography. Hasil pengolahan data menunjukkan bahwa pola arus di Perairan Teluk Banten didominasi arus pasut dengan kecepatan berkisar antara 0-0,41 m.s-1, ditunjukkan oleh hasil pengolahan dalam bentuk stick diagram dan scatter plot yang menunjukkan pergerakan arus cenderung teratur dan arah arus dominan menuju ke arah Tenggara dan Selatan, hal ini juga didukung dengan hasil Current rose dengan menggunakan software WR plot. Kecepatan arus di permukaan lebih besar dan menyebar dibanding kecepatan arus di dekat dasar perairan. Simulasi arus permukaan (nilai error MRSE 12,25 %) menunjukkan bahwa arus bergerak sesuai dengan pengaruh pasang dan surut dengan kecepatan berkisar antara 0-0,42 m.s-1. Simulasi juga memperlihatkan distribusi konsentrasi nutrient dan kualitas perairan dipengaruhi oleh karakteristik hidrodinamika Teluk Banten.
Hydrodynamics of Bontang Seawaters: Its Effects on the Distribution of Water Quality Parameters Wisha, Ulung Jantama; Husrin, Semeidi; Prasetyo, Gegar Sapta
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 21, No 3 (2016): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.21.3.123-134

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Bontang is a crowded with residential and industrial activities which produce heat waste into surrounding waters. This condition may cause environmental problems, and changes in water condition. Knowledge about dynamics of physic and chemical waters condition in Bontang city is very important as an effort to address environmental issues as part of coastal zone management and protection. The aim of this research is to understand hydrodynamic characteristics (tide and current) and the influence to distribution of physics and chemical in Bontang waters base on primary data (current and tide during one month, physics and chemicals waters data taken by in situ) and secondary data (bathymetry and tide forecasting). Hydrodynamic simulation is based on MIKE 21 and supported by CD-Oceanography and WR plot. The results show that the current is dominant move toward the Southwest and Northeast with current speed ranged from 0-0,22 m.s-1. The results of hydrodynamic simulation in the surface water show that the current move base on tide movement with current speed ranged from 0-0,24 m.s-1. The results of physic and chemical concentration is analysed by ArcGIS 10 to know spatial distribution of all parameters. Surface temperature ranged from 29-31,8oC, surface density ranged from 20-20,6 ppm, salinity ranged from 33,1-33,5 ppm, dissolve oxygen concentration ranged from 0,078-0,11 ppm. Distribution of all physic and chemical parameters is influenced by current and tide movement. Keywords: current, numerical model, water quality, Bontang waters
PARTICLE SIZE CHARACTERISTICS OF RIVERBED SEDIMENTS TRANSPORTED BY TIDAL BORE ‘BONO’ IN KAMPAR ESTUARY, RIAU-INDONESIA Gemilang, Wisnu Arya; Wisha, Ulung Jantama; Rahmawan, Guntur Adhi
Marine Research in Indonesia Vol 43, No 1 (2018)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1416.394 KB) | DOI: 10.14203/mri.v43i1.293

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The presence of tidal bore in the Kampar River (locally known as ‘bono’) may influence sedimentation in the Kampar River and its estuary. Understanding sedimentation mechanisms (e.g., erosion, deposition) is important to communities along the Kampar River, which can be studied by analyzing characteristics of grain size distribution. Here, we study riverbed sediment samples collected from 17 stations using an Ekman grab sampler, accompanied by bathymetry and acoustic Doppler current profiler (ADCP) measurements. Grain size data show that the sediments are coarser upstream and gradually finer downstream. Silty sands are predominant in the upstream section of the river, sands in its river body and sandy silts in the downstream. The results indicate the influence of undular bores on grain size characteristics. We also found that the propagation of bono and Kampar River’s funnelshaped morphology cause intense scouring events of riverbed sediments. Sortation values that range between 0.332.14 suggest unstable currents that result in randomly deposited sediments. The sediment mass transfer per area is positively towards downstream at the low tidal condition. However, after the passage of the bores, the sediment mass transfer area becomes negatively towards upstream.
Bathymetry and Hydrodynamics in Pare Bay Waters During Transitional Seasons (SeptemberOctober) Wisha, Ulung Jantama; Heriati, Aida
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2016.12.2.98

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Sedimentation on Pare bay and Karajae estuary originated from the run off of Karajae River. Highsedimentation process leads to the adverse effect of abiotic environmental changes. The aim of thisresearch is to analyse bathymetry condition and hydrodynamic characteristics of the area inunderstanding sediment distribution on Pare Bay. Corrected bathymetric data by tide data isprocessed using Surfer software 9.0 versions to analyse Pare Bay contour in 2D and 3D, the resultshow depth ranges from 0 to 20 meters. Flow model module by MIKE 21 software was used inhydrodynamic simulation (MRSE 11.44%) and shows that current condition in Pare Bay wasdominated by tidal (within its speed up to 0.43 ms-1), surface currents speed is higher and morerandom than the speed in water column and near bottom. Due to its location, Pare Bay is directlyinfluenced by Indonesian Through flow which has strong currents flow and cause mixing andturbulence along its way, this condition influences Pare Bay condition, especially in the process ofsedimentation and turbulence.  Keywords: bathymetry, currents, hydrodynamics, sedimentation, pare bay
KELIMPAHAN FITOPLANKTON DAN KONSENTRASI TSS SEBAGAI INDIKATOR PENENTU KONDISI PERAIRAN MUARA SUNGAI PORONG Wisha, Ulung Jantama; Yusuf, Muh; Maslukah, Lilik
Jurnal Kelautan Vol 9, No 2: Oktober (2016)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v9i2.1298

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Pembuangan limbah dan lumpur ke Sungai Porong diduga akan berdampak bagi lingkungan sekitarnya, khususnya meningkatnya konsentrasi padatan tersuspensi (TSS) dan mempengaruhi sebaran fitoplankton di wilayah tersebut. Tujuan dari dilakukannya penelitian ini adalah untuk mengetahui konsentrasi muatan padatan tersuspensi, kekeruhan dan kelimpahan fitoplankton di perairan muara Sungai Porong, Kabupaten Sidoarjo. Metode penelitian yang digunakan adalah metode deskriptif. Data yang dikumpulkan sebagai variabel ukur adalah muatan padatan tersuspensi, kekeruhan, kelimpahan fitoplankton dan kecepatan serta arah arus. Variabel pendukung meliputi data pasang surut dan peta bathimetri wilayah muara Sungai Porong. Data yang diperoleh selanjutnya dianalisis menggunakan program Arc GIS 10, sehingga menghasilkan output berupa distribusi spasial. Konsentrasi muatan padatan tersuspensi 542-885 mg/l. konsentrasi kekeruhan 3.7-20.5 NTU. Kelimpahan fitoplankton 153-238 ind/l. Berdasarkan data tersebut dapat diketahui bahwa sebaran muatan padatan tersuspensi dan kekeruhan memiliki kaitan dengan kelimpahan fitoplankton pada saat surut, meskipun pada kuantitas yang tidak selalu sama. Arah sebaran bergerak ke arah Timur atau menjauhi muara sungai. ABUNDANCE OF PHYTOPLANKTON AND TSS VALUE AS AN INDICATOR FOR PORONG RIVER ESTUARY WATER CONDITIONSDisposal of waste and mud into Porong River is expected to have an impact to the surrounding environment, particularly the increasing concentration of suspended solids (TSS) and affect the distribution of phytoplankton in the region. The purpose of this study was to determine the correlation between the concentration of TSS and abundance of phytoplankton as an indicator for determinate condition of Porong River Estuary. Determining the location of sampling by purposive sampling method. The data were then analyzed with statistical methods and spatially using ArcGIS 10 program. The concentration of suspended solids charge 542-885 mg/L. concentration of 3.7-20.5 NTU turbidity. The abundance of phytoplankton 153-238 ind/L with a diversity index ranged from 0.4 to 0.62. Hydrodynamic modeling simulated using ADCIRC module of SMS 8.1 software with a current velocity in the range of 0 to 0.04 m.s-1. Distribution of TSS and turbidity linked to the abundance of phytoplankton at low tide, although the quantity is not always the same, based on the diversity index and the condition of the Porong River estuary is in category of lightly polluted.Keywords: Diversity Index, Phytoplankton, Porong estuary, Totally Suspended Solids
KARAKTERISTIK HIDRODINAMIKA DI PERAIRAN TELUK AMBON UNTUK MENDUKUNG WISATA SELAM Ondara, Koko; Rahmawan, Guntur Adhi; Wisha, Ulung Jantama
Jurnal Kelautan Vol 10, No 1 (2017)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v10i1.2170

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Teluk Ambon terbagi oleh dua ambang yaitu Teluk Ambon Dalam dan Teluk Ambon Luar. Teluk Ambon kaya akan potensi baharinya baik dari keunikan ikan, terumbu karang maupun benda-benda seperti kapal tenggelam yang bisa dikembangkan potensinya sebagai wisata bahari. Penelitian kali ini bertujuan untuk mengetahui karakteristik gelombang dan pasang surut yang ada di perairan Teluk Ambon dengan menggunakan simulasi numerik. Metode yang digunakan adalah metode purposive kuantitatif, data primer terdiri dari batimetri, pasang surut dan angin, sedangkan data sekunder terdiri dari data peramalan pasang surut menggunakan MIKE 21, Flow Model FM Hydrodynamic Module digunakan untuk mensimulasikan pola pasang surut dan arus yang kemudian dijadikan sebagai input dalam modul spectral wave MIKE 21. Dari data pengolahan pasut didapatkan tipe pasut Teluk Ambon adalah condong harian ganda dengan nilai F= 0.602, Mean Sea Level sebesar 124.76 cm, Zo 148.72 cm dan nilai Chart Datum -23.96 cm. Kecepatan arus rata-rata 0.009-1.463 m/s sedangkan tinggi gelombang signifikan 0-0.00279 m. Kondisi hidrodinamika Teluk Ambon sangat mendukung dalam kegiatan wisata bahari minat khusus salah satunya adalah SS.Aquila. Kata Kunci:Hydrodinamika, SS.Aquila, Gelombang, Arus, Pasang SurutHYDRODYNAMIC CHARACTERISTICS IN AMBON BAY WATERS TO SUPPORT MARINE DIVING TOURISM Ambon Bay is divided by two thresholds, namely Teluk Ambon Dalam and Teluk Ambon Luar. Ambon bay is rich in marine potential both the unique of fisheries and coral reefs as well as the objects such as shipwreck that could be developed as a maritime tourism potential. The aim of this study is to investigate the characteristics of waves and tides in the waters of Ambon Bay (inner and outer of Ambon Bay) by using numerical simulation. The method is using purposive quantitative, the primary data are consisted of Bathymetry, Tide, and wind, while the secondary data is consisted of tide forecasting by MIKE 21, Flow Model FM Hydrodynamic Module is used to simulate tidal and current patterns that are used as input in the wave spectral module MIKE 21. From the data obtained, the tidal type of Ambon Bay waters is mixed tide prevailing semidiurnal based on Formzahl value 0. 0602 which obtained from the diurnal and semidiurnal major tide component calculation, Mean Sea Level is 124.76 cm, Zo is 148.72 cm and the value of Chart Datum is -23.96 cm. Current speed ranged from 0009-1463 m/s while the significant wave height ranged from 0-0.00279 m. Ambon Bay hydrodynamic conditions are calm and not too volatile, fortunately supportive in marine tourism activities of SS.Aquila site. Keywords: Currents, Hydrodynamics, SS. Aquila, Tides
Spatial Analysis of the River Line and Land Cover Changes in the Kampar River Estuary: The Influence of the Bono Tidal Bore Phenomenon Putra, Aprizon; Wisha, Ulung Jantama; Kusumah, Gunardi
Forum Geografi Vol 31, No 2 (2017): December 2017
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v31i2.5290

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The Kampar River estuary is well known for a tidal-bore phenomenon called ‘Bono waves’. The emergence of Bono waves has a significant influence on the estuary system of Kampar River. Scoured materials, resulting from the hydraulic jump of the tidal bore, are carried into the middle of the river. These materials are then deposited when the velocity of the river decreases as a result of the collision of the tidal current from the sea and the river flow. The aim of this was to determine the area of erosion and sedimentation with respect to the river line and perform land-cover change analysis for the area around the Kampar River estuary for the years of 1990, 2007, 2010 and 2016. The method employed was the supervised maximum likelihood (SML) classifications, which uses an overlay technique to yield alternate information on the river line and land-cover changes in the form of time-series data. The largest erosion occurred during 1990–2007, for which the average change reached 2.36 ha/year. The smallest erosion occurred during 2010–2016, when the change reached 0.41 ha/year. The largest land-cover change was found during 1990–2016, which occurred in the land for agriculture/plantations (11.57 ha/year), building/settlement (48.11 ha/year) and scrubland (30.88 ha/year). The other types of land cover, such as bare land and sediment deposition, varied every single year. The changes to the river line are caused by land-cover changes, and the Bono waves that lead to erosion and sedimentation that is not stable in the middle of the river and downstream.
PEMETAAN KERENTANAN PESISIR PULAU SIMEULUE DENGAN METODE CVI (COASTAL VULNERABILITY INDEX) Dhiauddin, Ruzana; Gemilang, Wisnu Arya; Wisha, Ulung Jantama; Rahmawan, Guntur Adhi; Kusumah, Gunardi
EnviroScienteae Vol 13, No 2 (2017): EnviroScienteae Volume 13 Nomor 2, Agustus 2017
Publisher : Universitas Lambung Mangkurat

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The diversity function of coastal areas requires the increasing need for land and infrastructure that will lead to new problems such as changes in coastal morphology, the occurrence of erosion and accretion, which is supported by the population growth caused the increasing of coastal vulnerable towards hazards. This paper aims to explain the parameters affect Simeulue Island’s coastal vulnerability - beach slope, geomorphology, geology, shoreline change, mean tidal range and mean wave height - and its mapping. The data used were the bathymetry, tide, and currents, the topography of coastal morphology, LANDSAT imagery of 2000 and 2015. To determine the coastal vulnerability level, we implemented CVI (Coastal Vulnerability Index) method of 6 parameters. Finally, we found that CVI from these physical parameters ranges between 1.291to 5.00, which were classified into five classes; 1.291 – 1.826 (very low), 1.826 – 2.449 (low), 2.449 – 2.887 (moderate), 2.887 – 3.651(high), and 3.651 – 5.00 (very high).