scholarly journals MARINE GEOLOGICAL AND HYDRO OCEANOGRAPHIC DATA FOR SITE SEAPORT LOCATION SELECTION AT SAMPIT BAY AND ITS SURROUNDING, EAST KOTAWARINGIN, CENTRAL KALIMANTAN

2016 ◽  
Vol 30 (1) ◽  
pp. 11
Author(s):  
I Wayan Lugra
Keyword(s):  
River Mouth ◽  
Surficial Sediment ◽  
Location Selection ◽  
Central Kalimantan ◽  
Sea Floor ◽  
Characteristic Mapping ◽  
Sandy Coast ◽  
Java Sea ◽  
Oceanographic Data ◽  
Port Location

Sampit Bay is one of many main gates to enter the Central Kalimantan Province, because there is Mentaya River Mouth as an access to the Sampit Harbour as a main port at its province. Until now, the Sampit Bay only used as anchored for big ships waiting turn to enter Sampit Port. The methods used are coastal characteristic mapping, seafloor surficial sediment sampling, grain size analyses, echosounding, and current measurement. Sampit bay has sandy coast, sand of sea floor surficial sediment, and gradation of sea floor morphology which is suitable for sea port location. On the other hand, the velocity of the surface and midle current in the bay ranging between 0.1-0.3 m/second which is dominated by south east direction. The mentioned velocity is under threshold for safety ship anchoraged. Beside that, most of the bay open to the wind from west and south west facing Java Sea, where the velocity ranging from 5-13 m/second which is included into weak catagories. Location is recommended to be sea port candidate in the south of Ujung Pandaran.Keywords: Sampit Bay, port location, coastal characteritistic, sea floor surficial sediment, current velocity. Teluk Sampit adalah salah satu gerbang utama memasuki Propinsi Kalimantan Tengah, karena tempat bermuaranya Sungai Mentaya yang merupakan akses menuju ke pelabuhan Sampit sebagai pelabuhan utama di provinsi tersebut. Selama ini teluk Sampit hanya digunakan sebagai tempat lego jangkar kapal-kapal besar yang menunggu giliran untuk berlabuh di Pelabuhan Sampit. Metode yang digunakan adalah pemetaan karakteristik pantai, pengambilan contoh sedimen permukaan dasar laut, analisis besar butir, pemeruman, dan pengukuran arus. Teluk Sampit memiliki jenis pantai berpasir dan sedimen permukaan dasar laut pasir serta morfologi dasar laut yang bergradasi cukup layak untuk lokasi pelabuhan. Disamping itu kecepatan arus permukaan dan menengah di teluk tersebut berkisar antara 0,1-0,3 meter/detik dengan arah dominan ke arah tenggara, dimana kecepatan arus tersebut masih dibawah ambang batas untuk keamanan kapal berlabuh. Disamping itu, sebagian besar teluk tersebut terbuka terhadap hembusan angin arah barat dan tenggara yang berhadapan dengan laut Jawa dimana kecepatan angin yang bertiup antara 5-13 meter/detik dan termasuk dalam katagori lemah. Lokasi yang paling layak untuk lokasi pelabuhan adalah sebelah selatan Ujung Banaran. Kata kunci: Teluk Sampit, lokasi pelabuhan, karakteristik pantai, sedimen permukaan dasar laut, kecepatan arus.

scholarly journals PROSES SEDIMENTASI DI TELUK SAMPIT, KABUPATEN KOTA WARINGIN TIMUR KALIMANTAN TENGAH DALAM KAITANNYA DENGAN ALUR PELAYARAN KE PELABUHAN SAMPIT

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Wayan Lugra ◽  
Ketut Gede Aryawan
Keyword(s):  
River System ◽  
High Energy ◽  
Field Investigation ◽  
High Rate ◽  
Longshore Current ◽  
Central Kalimantan ◽  
Sea Floor ◽  
Energy Environment ◽  
Java Sea ◽  
Small Basin

Teluk Sampit adalah tempat bermuaranya Sungai Mentaya yang merupakan akses menuju ke pelabuhan Sampit sebagai pelabuhan utama di propinsi Kalimantan Tengah. Masalah utama yang terjadi di alur pelayaran adalah sedimentasi yang cukup tinggi yang dibawa oleh daerah aliran sungai yang bermuara di Teluk Sampit. Proses sedimentasi dan pembentukan pantai yang terjadi di teluk Sampit sangat dipengaruhi sistem arus sungai, pasang surut dan energi gelombang, serta pasokan sedimen dari sungai-sungai. Hasil penelitian menunjukan bahwa sedimentasi yang paling tinggi terjadi di daerah barat bagian dalam teluk yang terlindung oleh spit Ujung Pandaran, dimana jenis pantainya berbakau. Di bagian timur proses sedimentasi relatif lebih kecil karena garis pantai terbuka terhadap Laut Jawa sehingga pengaruh energi gelombang dan pasang surut cukup tinggi. Endapan pantai ini berupa sedimen pasir yang mengindikasikan diendapkan pada lingkungan energi tinggi. Proses pembentukan Spit Ujung Pandaran murni oleh proses marin yaitu gelombang, pasang surut dan arus memanjang pantai, dimana pasokan sedimen dari hasil pelapukan dan abrasi Formasi Pembuang yang terletak di sebelah barat bagian luar. Spit ini sangat berpengaruh terhadap lebar mulut teluk dan pendangkalan di teluk. Morfologi permukaan dasar laut teluk Sampit menunjukan hal yang tidak lazim, dimana di bagian tengah ada lekukan yang memiliki kedalaman sampai dengan 18 meter, hal ini dapat ditafsirkan bahwa pernah dilakukan pengerukan di mulut teluk untuk keamanan navigasi. Untuk menjaga keamanan navigasi di teluk Sampit agar dapat dilayari maka harus dilakukan pengerukan secara berkala. Kata Kunci : sedimentasi, morfologi permukaan dasar laut, pengerukan, Teluk Sampit Sampit Bay is the place of Mentaya estuary as an access to the main Sampit Harbour in the Central Kalimantan Province. The main problem for the access is high of sedimentation transported by many rivers into the Sampit Bay. Sedimentation process and beach forming in Sampit Bay are influenced by current river system, tide, wave energy and sedimentary supply from the rivers. From the field investigation indicate that high rate of sedimentation occur in western part of the inner bay, due to the bay is protected by Ujung Pandaran Spit, where mangrove is dominated in that beach. In the eastern part, the sedimentation rate is relatively small, because the coast line is open to the Java Sea, so that the influence of wave and tide energy is relatively high. This coastal deposit is represented by sand so that the sediment was deposited in high energy environment. The formation of Spit Ujung Pandaran is pure by marine procceses such as tide, wave, longshore current, where the sedimentary supply from weathered and erotion of Pembuang Formation, which is located in the west off Ujung Pandaran Capé. The spit can influenced to the wide of the bay and high rate sedimentation at the bay. The sea floor morphology of the Sampit Bay is not common, where in the central of the bay, we found a small basin with 18 meters depth, this fact is interpreted that the basin had been dredged in the mouth of the bay for safety navigation. For safety navigation in the Sampit Bay, it is consequently must be dredged regularly. Key words : sedimentation, morphology of the sea floor, dredged, the Sampit Bay

MOPHOLOGY CHANGE AND RECOVERY PROCESS OF SANDY COAST AND SANDSPIT AT THE NATORI RIVER MOUTH AFTER THE 2011 TSUNAMI

2019 ◽  
Vol 75 (2) ◽  
pp. I_797-I_802 ◽  
Author(s):  
Nguyen Trong HIEP ◽  
Hitoshi TANAKA ◽  
Nguyen Xuan TINH ◽  
Kinuko ITO ◽  
Takumi YAMANAKA
Keyword(s):  
River Mouth ◽  
Recovery Process ◽  
Sandy Coast

scholarly journals MAJUNYA GARIS PANTAI YANG DIAKIBATKAN OLEH PROSES SEDIMENTASI DI SEPANJANG PANTAI PERAIRAN KABUPATEN REMBANG

2016 ◽  
Vol 6 (3) ◽  
Author(s):  
Deny Setiady ◽  
Ediar Usman
Keyword(s):  
Coastal Area ◽  
Sandy Beach ◽  
River Mouth ◽  
Mouth Area ◽  
Sediment Supply ◽  
Coastal Morphology ◽  
River Mouth Area ◽  
Sea Bottom ◽  
Sandy Coast ◽  
Very High

Majunya garis pantai yang terjadi di sekitar pantai perairan Rembang melingkupi daerah yang luas. Kondisi ini disebabkan morfologi pantai yang sangat landai dan pasokan sedimen yang tinggi terutama di sekitar muara sungai Pasokan sedimen dari sungai yang mengalir ke pantai utara Rembang membentuk endapan sedimen permukaan dasar laut. Sedimen tersebut juga menimbulkan akrasi sepanjang pantai Berdasarkan pemetaan karakteristik pantai perairan Rembang terdiri dari pantai berpasir, pantai berlumpur, pantai berbatu dan terumbu. Akrasi terjadi pada pantai berpasir dan terumbu. Kata Kunci: Majunya garis pantai, Sedimen, Rembang The emerging land in Rembang coastal area is very widely distributed. This is due to a very flat coastal morphology and very high sedimentary supply especially found around river mouth area. Sediment supply from rivers mouthed to north Rembang coast form sea bottom surficial sediment. The sediment is also causing emerging land or accretion along the coastal area of Rembang. Based on coastal characteristics mapping Rembang coastal area consisted of sandy coast, muddy coast, rocky beach and reefy coast. Accretion occurred at sandy beach and reefy coast Keyword: Emerged Land, Sediment, Rembang

scholarly journals SEDIMENTATION RATE BASED ON OCEANOGAPHIC PARAMETERS REVIEWS IN THE ESTUARY OF KAPUAS, CENTRAL KALIMANTAN

2016 ◽  
Vol 26 (2) ◽  
pp. 85
Author(s):  
Delyuzar Ilahude
Keyword(s):  
Coastal Zone ◽  
Sedimentation Rate ◽  
River Mouth ◽  
Wave Action ◽  
Sediment Supply ◽  
Longshore Current ◽  
Central Kalimantan ◽  
The North ◽  
Ship Navigation

Secara geografis daerah penelitian terletak di muara Sungai Kapuas Kalimantan Tengah. Kawasan pantai ini sangat terbuka dipengaruhi oleh aksi gelombang dari arah tenggara, selatan, baratdaya dan barat. Di pesisir pantai muara Sungai Kapuas terdapat arus sejajar pantai yang bergerak masuk ke arah muara. Pergerakan arus sejajar pantai tersebut memasok sedimen dari arah tenggara dan barat ke muara. Sedimen tersebut cenderung diendapkan di sisi barat dari muara Kapuas. Hal ini menjadi kendala alur pelayaran di muara Sungai Kapuas. Kata kunci : arus sejajar pantai, muara, Kapuas Geographically, the study area is located on the coast of Kapuas River mouth, Central Kalimantan. This open beach area is affected by wave action from southeast, south, southwest and west direction. The longshore current drifts to the estuary on the coastal zone of the Kapuas River. It gives potential sediment supply from the southeast to the north. The sediment tends to be deposited in the western part estuary of Kapuas.This particular thing evokes the ship navigation in Kapuas estuary. Keywords : longshore current, estuary, Kapuas

scholarly journals KONDISI HIDRODINAMIKA PERAIRAN SUNGAI LIAT BANGKA BERDASARKAN MODEL MIKE 21-HD-AD SEHUBUNGAN DENGAN MORFOLOGI AKIBAT PENAMBANGAN DI LAUT

2016 ◽  
Vol 10 (1) ◽  
pp. 39
Author(s):  
Franto Novico ◽  
Citrawan Sinaga
Keyword(s):  
Numerical Model ◽  
River Mouth ◽  
Mining Operation ◽  
Hydrodynamic Condition ◽  
Hydrodynamic Conditions ◽  
Sea Floor ◽  
Mine Dumps ◽  
The North ◽  
Maximum Current ◽  
Mike 21

Penambangan timah di perairan sekitar Sungai Liat- Bangka oleh kapal keruk dan hisap telah menyebabkan terjadinya perubahan kondisi dasar laut yang sangat besar dengan ditemukannya batimetri yang sangat tidak beraturan di sekitar wilayah foreshore, terutama pada bagian barat muarasungai. Pendekatan model numerik dengan menggunakan software Mike 21 HD-AD menjadi metode pilihan untuk mendapatkan gambaran kondisi hidrodinamika sekitar muara dan garis pantai sekitar Sungai Liat. Berdasarkan hasil simulasi didapatkan bahwa dengan perkiraan pelaksanaan kegiatan penambangan 24 jam sehari selama 15 hari model operasi maka kondisi sebaran buangan akan terbawa hingga jarak terjauh 15 km ke arah selatan, sementara sebaran bergerak ke arah utara sejauh 5 km dari lokasi sumber buangan. Waktu yang dibutuhkan untuk sebaran mencapai garis pantaiadalah 27 jam setelah penambangan dioperasikan. Sementara nilai kecepatan arus maksimum pada saat bulan penuh sebesar 1.5 m/det dengan arah arus dominan ke utara sementara pada saat bulan mati kecepatan maksimum sebesar 1.2 m/det dengan arah arus dominan ke tenggara. Kata kunci : Kondisi Hidrodinamika Sungai Liat, Model Numerik, Buangan Tambang The mining activities using dredging vessel and suction vessel that have done near river mouth of Sungai Liat and along coast line yielded a big deformation of sea floor bathymetry at foreshore especially west side a river mouth. Mike 21 HD-AD software as numerical model was selected as method to describe hydrodynamic conditions around river mouth and along coastline near the Sungai Liat River. Based on simulations where the mining operation is predicted 24 hours a day within 15 days operation model therefore a range of outsource dispersion of 15 km to south while 5 km flows to the north from the mine dumps position. A dispersion of mine dumps would be achieve a coastline in 27 hours since the mining begun. In addition, maximum current in spring time shows 1.5 m/sec to the north direction whereas in neap time the current shows 1.2 m/sec to the southeast direction. Keywords: Hydrodynamic Condition, Sungai Liat, Numerical Model, Mine dumps

scholarly journals The oceanic environment beneath the northwest Ronne Ice Shelf, Antarctica

1994 ◽  
Vol 20 ◽  
pp. 386-390 ◽  
Author(s):  
Allan Robinson ◽  
Keith Makinson ◽  
Keith Nicholls
Keyword(s):  
Water Column ◽  
Ice Crystals ◽  
Temperature Record ◽  
Shelf Water ◽  
Ice Shelf ◽  
Sea Floor ◽  
Oceanographic Data ◽  
A Site ◽  
Temperature Depth

Oceanographic data have been obtained from beneath the Ronne Ice Shelf at a site on the southeastern side of a sea-floor trough, the Ronne Depression. The data consist of 5 d of conductivity temperature depth (CTD) profiling and a long-term temperature record from a thermistor cable. The water column was found to be composed of two layers: a cold buoyant layer of lce Shelf Water (ISW) overlying a layer of unmodified Western Shelf Water (WSW).A change in the water column was observed on the last day of profiling, the WSW layer thinning, a cold intrusion appearing directly above the WSW and the ISW becoming colder. In addition, on three profiles the ISW cooled further and increased in salinity, becoming apparently statically unstable. The temperature record from the thermistor cable confirms that the ISW layer occasionally becomes colder. with greater variation in temperature than seen on the CTD profiles. These low temperatures and high salinities arc interpreted as indicating that water containing ice crystals in suspension has been advected beneath the site.

scholarly journals HEAVY MINERAL DISTRIBUTION PATTERNS AND CHARACTERISTICS OF SEA FLOOR SURFICIAL SEDIMENT AT EAST BALI WATERS, BALI PROVINCE

2016 ◽  
Vol 26 (2) ◽  
pp. 105
Author(s):  
I Wayan Lugra
Keyword(s):  
Grain Size ◽  
Distribution Patterns ◽  
Heavy Mineral ◽  
Surficial Sediment ◽  
Heavy Minerals ◽  
Distribution Area ◽  
Carbonate Group ◽  
Sandy Gravel ◽  
Sea Floor ◽  
Beach Sediments

Analyses result of the heavy minerals that was took from beach sediments and sea floor surficial sediments was founded ten heavy minerals namely hematite, magnetite, limonite and rutile from oxide and hydroxide group, pyroxene, amphibol and zircon from silicate group, biotit from mica group, barite from sulfide group and dolomite from carbonate group. From 10 minerals identified, only magnetit distributes in the whole area, with the highest percentage of 34,15% in the sea and 35,14 % on beaches. Other heavy minerals distribute locally with the percentage of less than 0,01 %. Grain size analyses result of sea floor surficial sediment had identified six units sediment such as sand, sand with few gravel, sandy gravel, gravely sand, gravel and reef. Distribution area of the six units sediment as follows sand and sandy gravel are occupied 25 % respectively of the study area, reef 20%, sand 15 %, gravel 10 % and gravely sand occupied 5%. The best sediment for making art goods is sand sizes which is rich of heavy minerals such as magnetite, hematitre, limonite, zircon, pyroxene and amphibol. If will be exploited of the sand sediment on beach or sea floor surficial sediment, should be considering of the environment sustainable. Keyword: grain size analyses, heavy mineral, seafloor surficial sediment, besach sediment, Karang Asem Hasil analisis mineral berat dari sedimen pantai dan permukaan dasar laut dijumpai sepuluh jenis mineral berat yaitu magnetit, hematit, limonit, rutil dari kelompok oksida & hidroksida, piroksen, ampibol, sirkon dari kelompok silikat, biotit dari kelompok mika, barit dari kelompok sulfida dan dolomit dari kelompok karbonat. Dari sepuluh jenis mineral berat yang teridentifikasi hanya magnetit yang sebarannya merata di seluruh daerah penyelidikan baik di laut maupun di pantai dengan persentase tertinggi 34,15 % di laut dan 35,14% di pantai, sedangkan sembilan mineral lainnya sebarannya tidak merata atau setempat-setempat dengan persentase umumnya di bawah 0,01 %. Hasil analisis besar butir sedimen permukaan dasar laut dapat di bedakan menjadi 6 satuan yaitu pasir, pasir sedikit krikilan, pasir krikilan, krikil pasiran, krikil dan terumbu karang. Luas sebaran ke enam jenis sedimen tersebut terhadap luas daerah penelitian adalah pasir sedikit krikilan menempati 25%, pasir krikilan 25%, terumbu karang 20%, pasir 15%, krikil 10% dan menempati pasir krikilan 5%. Jenis sedimen yang baik untuk pembuatan benda seni adalah sedimen berukuran pasir dengan kandungan mineral berat yang tinggi seperti magnetit, hematit, limonit, sirkon, piroksen, dan ampibol. Bila akan dilakukan eksploitasi terhadap sedimen jenis pasir baik di laut maupun di pantai, harus memperhatikan kelestarian lingkungan. Kata kunci: analisis besar butir, mineral berat, sedimen permukaan dasar laut, sedimen pantai, Karang Asem

scholarly journals The oceanic environment beneath the northwest Ronne Ice Shelf, Antarctica

1994 ◽  
Vol 20 ◽  
pp. 386-390 ◽  
Author(s):  
Allan Robinson ◽  
Keith Makinson ◽  
Keith Nicholls
Keyword(s):  
Water Column ◽  
Ice Crystals ◽  
Temperature Record ◽  
Shelf Water ◽  
Ice Shelf ◽  
Sea Floor ◽  
Oceanographic Data ◽  
A Site ◽  
Temperature Depth

Oceanographic data have been obtained from beneath the Ronne Ice Shelf at a site on the southeastern side of a sea-floor trough, the Ronne Depression. The data consist of 5 d of conductivity temperature depth (CTD) profiling and a long-term temperature record from a thermistor cable. The water column was found to be composed of two layers: a cold buoyant layer of lce Shelf Water (ISW) overlying a layer of unmodified Western Shelf Water (WSW). A change in the water column was observed on the last day of profiling, the WSW layer thinning, a cold intrusion appearing directly above the WSW and the ISW becoming colder. In addition, on three profiles the ISW cooled further and increased in salinity, becoming apparently statically unstable. The temperature record from the thermistor cable confirms that the ISW layer occasionally becomes colder. with greater variation in temperature than seen on the CTD profiles. These low temperatures and high salinities arc interpreted as indicating that water containing ice crystals in suspension has been advected beneath the site.

scholarly journals Microplastics in the surface sediments from the eastern waters of Java Sea, Indonesia

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 98 ◽  
Author(s):  
Defri Yona ◽  
Syarifah Hikmah Julinda Sari ◽  
Feni Iranawati ◽  
Syamsul Bachri ◽  
Wulan Cahya Ayuningtyas
Keyword(s):  
Mangrove Forest ◽  
Surface Sediments ◽  
River Mouth ◽  
Plastic Pollution ◽  
Shrimp Pond ◽  
Industrial Activities ◽  
Mangrove Area ◽  
Open Sea ◽  
Java Sea ◽  
The Government

Background: This study aimed to investigate the abundance of microplastics in the eastern water of Java Sea. The study areas are well known for the high population and high industrial activities that can contribute to the plastic pollution. Methods: Microplastics were sampled from the surface sediments at five different stations representing different local activities: fish landing area (St 1), mangrove forest (St 2), abandoned shrimp pond (St 3), river mouth (St 4) and open sea (St 5). Results: Three types of microplastics were found; the most common was plastic fragments (54.34±6.39%) followed by fibers (41.45±4.59%) and films (4.21±3.90%). The highest abundance of microplastics was observed in the mangrove area (896.96±160.28 particles/kg), dominated with fragments and fibers. Films were found in greatest quantities in the fish landing area, but compared to the other types of microplastics, the abundance was much lower (80.73±37.62 particles/kg). Domestic wastes and fisheries activities were the main causes of the high microplastics in the study areas. Conclusions: The results of this study showed that microplastic pollution is a serious problem that needs to be paid attention not only from the government but also from the local people. Plastics management waste is needed.

scholarly journals Karakteristik Situs Pesisir di Kecamatan Kumai, Kabupaten Kotawaringin Barat.

KALPATARU ◽  
2015 ◽  
Vol 24 (2) ◽  
pp. 103
Author(s):  
Sunarningsih Sunarningsih
Keyword(s):  
Inductive Reasoning ◽  
Coastal Areas ◽  
Archaeological Sites ◽  
Archaeological Survey ◽  
The South ◽  
Central Kalimantan ◽  
Archaeological Data ◽  
Java Sea ◽  
Trading Activities ◽  
Strategic Position

Kabupaten Kotawaringin Barat yang berada di Provinsi Kalimantan Tengah memiliki kawasan pesisir, tepatnya di sebelah selatan, yang berbatasan langsung dengan Laut Jawa. Posisi yang strategis tampaknya sangat berpengaruh terhadap perkembangan kebudayaan di daerah tersebut. Kesempatan untuk dapat berinteraksi dengan dunia luar menjadi sangat mungkin. Keberadaan situs arkeologi di pesisir menjadi sangat menarik untuk dikaji lebih lanjut. Tulisan ini ditujukan untuk mengetahui karakteristik situs tersebut. Metode penelitian bersifat deskriptif eksplanatif dengan penalaran induktif. Data arkeologi yang digunakan merupakan hasil survei arkeologi pada tahun 2014. Hasil survei menemukan adanya beberapa kelompok temuan yang berada di wilayah Desa Sebuai dan Desa Pendulangan, dengan keramik sebagai temuan terbanyak. Berdasarkan hasil analisis artefaktual dan lingkungan, sintesa dan interpretasi menunjukkan bahwa situs di pesisir tersebut, selain sebagai tempat hunian dari abad ke-13 - 14 hingga sekarang, juga memegang peranan penting dalam aktivitas perdagangan dengan daerah luar, serta mempunyai keterkaitan yang erat dengan situs arkeologi di daerah pedalaman. Abstract. The regency of West Kotawaringin, which is located in Central Kalimantan province, has coastal areas, precisely in the south, which is directly adjacent to the Java Sea. Its strategic position seems very influential on the development of culture in this area. The opportunity to interact with the outside world becomes very possible. The existence of archaeological sites on the coast became very interesting to be studied further. This article discusses the characteristics of the sites. The method used in this article is inductive reasoning and an explanatory descriptive. Archaeological data were obtained from archaeological survey in 2014. It can be concluded that the coastal sites were not only served as dwelling places from 13 - 14 AD to present, but also played an important role in trading activities with abroad, as well as having strong links with archaeological sites in the hinterland.

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