scholarly journals KARAKTERISTIK PANTAI KAWASAN PESISIR LARANTUKA DAN SEKITARNYA, P. FLORES TIMUR DAN KAWASAN PESISIR P. ADONARA BARAT

2016 ◽  
Vol 8 (2) ◽  
pp. 75
Author(s):  
Prijantono Astjario ◽  
Ai Yuningsih
Keyword(s):  
Key Words ◽  
Sandy Beach ◽  
Eastern Coast ◽  
Coastal Morphology ◽  
Coast Line ◽  
Volcanic Breccia ◽  
Sand And Gravel ◽  
Shallow Bay ◽  
Mangrove Trees

Kawasan pantai Larantuka berada di pantai timur Pulau Flores dan kaki Gunungapi Ile Mandiri membentuk bentang alam pesisir bertebing curam dan landai. Kawasan pesisir dapat diklasifikasikan dalam tiga tipe pantai, yaitu tipe pantai bertebing berbatu, pantai berpasir dan pantai berbakau. Tipe pantai bertebing berbatu berada pada kaki gunungapi dibatasi oleh lava. Tipe pantai berpasir merupakan kawasan pantai dengan bentang alam landai sedangkan kawasan pantai berbakau tersebar cukup luas khususnya pada teluk dangkal. Pulau Adonara didominasi oleh produk gunungapi tua yang terdiri dari lava, breksi gungungapi dan pasir-tufa gampingan. Kawasan pantai tipe bertebing berbatu ditempati oleh batugamping terumbu serta lava. Sedangkan tipe pantai berpasir yang membentuk bentang alam landai ditempati pasir serta kerikil volkanik dengan terkadang ditemui tumbuhan bakau. Kata kunci : kawasan pesisir, bakau, bongkah, dan lava Lanrantuka area lies on the eastern coast of Flores island and in the foot of the Ile Mandiri mountain. The Larantuka area has steep and slightly slopes. Coastal morphology can be classified into three beach types, steep and stony, sandy and mangrove beaches. The steep and stony beach lie on foot of a mountain with lava boulder. The sandy beach has slightly slope coast line and mangrove beach develops widely in area specially in the shallow bay. Adonara island is dominated by old volcanic products, which are composed of lava, volcanic breccia and calcareous-sandy tuff. The coastal type with steep and stony beach is covered by coral limestone and lava. The sandy beach has slightly slope coast line covered by sand and gravel volcanics with occasionally mangrove trees. Key words : coastal, mangrove, boulder and lava.

scholarly journals KARAKTERISTIK PANTAI DI KAWASAN PESISIR TIMUR PULAU NATUNA BESAR, KABUPATEN NATUNA, PROPINSI RIAU

2016 ◽  
Vol 8 (1) ◽  
pp. 47
Author(s):  
Prijantono Astjario ◽  
Deny Setiady
Keyword(s):  
Sandy Beach ◽  
East Coast ◽  
South Coast ◽  
Eastern Coast ◽  
The South ◽  
Coast Line ◽  
The North ◽  
River Mouths ◽  
Base Rock

Kawasan pesisir timur pulau Natuna Basar memiliki garis pantai yang bervariasi, dari pantai berpasir, pantai berbatu hingga pantai berbakau. Tipe pantai barbakau hanya menempati pada kawasan muara-muara sungai yang sangat dangkal dan berlumpur. Sedangkan pantai berpasir adalah tipe pantai yang mendominasi kawasan pesisir timur pulau Natuna Besar, memanjang dari utara hingga selatan. Pantai berbatu adalah pesisir pantai dengan bongkah granit yang tersebar di kaki Gunung Ranai. Sebaran bongkah granit secara tidak beraturan dan tumpang tindih di kawasan pesisir menyebabkan garis pantai ini menjadi garis pantai yang bernilai wisata tinggi. Bongkah granit ini adalah bagian dari batholit granit Ranai yang merupakan batuan dasar dari kawasan kepulauan Natuna. Kata kunci : pantai, bakau, wisata, bongkah. East coast of Natuna Besar island has variation beach lines, sandy beach, stony beach and mangrove beach. Apparently type of mangrove beach develops in the river mouths, which are muddy and shallow. Sandy beach dominated eastern coast of Natuna Besar island, distributs form the north to the south coast. Stony beach is a coast with boulders of granite in the foot mountain of Ranai. Distribution of Granite boulders are disorientation and unorganized along the east coast, because of these, the coast line has highly tourism value. Granite boulders are part of batholite Ranai granite which is base rock of Natuna islands. Keywords : coast, mangrove, tourism, boulder.

scholarly journals Environmental signal shredding on sandy coastlines

2019 ◽  
Vol 7 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Eli D. Lazarus ◽  
Mitchell D. Harley ◽  
Chris E. Blenkinsopp ◽  
Ian L. Turner
Keyword(s):  
Sandy Beach ◽  
Shoreline Change ◽  
Storm Events ◽  
Shoreline Position ◽  
Physical Effects ◽  
Sand And Gravel ◽  
Open Question ◽  
Observational Record ◽  
Coastal Research

Abstract. How storm events contribute to long-term shoreline change over decades to centuries remains an open question in coastal research. Sand and gravel coasts exhibit remarkable resilience to event-driven disturbances, and, in settings where sea level is rising, shorelines retain almost no detailed information about their own past positions. Here, we use a high-frequency, multi-decadal observational record of shoreline position to demonstrate quantitative indications of morphodynamic turbulence – “signal shredding” – in a sandy beach system. We find that, much as in other dynamic sedimentary systems, processes of sediment transport that affect shoreline position at relatively short timescales may obscure or erase evidence of external forcing. This suggests that the physical effects of annual (or intra-annual) forcing events, including major storms, may convey less about the dynamics of long-term shoreline change – and vice versa – than coastal researchers might wish.

scholarly journals EXPERIMENT ON RESPONSE OF SANDY BEACH WITH DIFFERENT CONTENTS OF SAND AND GRAVEL TO WAVES

2016 ◽  
Vol 72 (2) ◽  
pp. I_655-I_660 ◽  
Author(s):  
Akio KOBAYASHI ◽  
Takaaki UDA ◽  
Yasuhito NOSHI ◽  
Takayuki YOSHINO
Keyword(s):  
Sandy Beach ◽  
Sand And Gravel

scholarly journals REVIEW OF COASTAL CHARACTERISTICS OF IRON SAND DEPOSITS IN CILACAP CENTRAL JAVA

2016 ◽  
Vol 22 (1) ◽  
pp. 35
Author(s):  
Hananto Kurnio
Keyword(s):  
Key Words ◽  
Sea Level ◽  
Coastal Area ◽  
Depositional Environment ◽  
Sandy Beach ◽  
Beach Ridges ◽  
Central Java ◽  
Sediment Loads ◽  
Sand Deposit ◽  
High Sediment

Mineable iron sand deposits in Cilacap – southern coastal area of Central Java have certain coastal characteristics that need to be studied in order to understand its depositional environment. With the knowledge of such environment, it can be applied to look for other places prospective of iron sand deposits that have the same characteristics especially recently when Cilacap’s deposits were almost depleted. Coastal characteristics of iron sand deposit in Cilacap is shown by successive sandy beach ridges separated by marshy valleys typical of prograded coasts and by dunes of sand elongated parallel to the shore line with elevation varies from 0 m to 15 m above sea level. The iron sand deposit was derived from denudation of andesite and “Old Andesite Formation” enriched in magnetite and ilmenite minerals in the steep elevated and deeply weathered rock hinterlands of Cilacap. High sediment loads of Serayu Basin in the hinterland (3,500-4,500 ton/km2/year; Citarum River basin only 800-1,200 ton/km2/year) was causing extensive deposition of iron sand in the coastal zone. Key words: coast, characteristic, iron sand, Cilacap Endapan pasir besi yang dapat ditambang di Cilacap – pesisir selatan Jawa Tengah memiliki karakteristik pantai tertentu yang perlu dikaji agar dapat dipahami lingkungan pengendapannya. Dengan pengetahuan tentang lingkungan pengendapan tersebut, dapat diterapkan untuk mencari daerah-daerah lain prospek endapan pasir besi yang memiliki karakteristik yang sama terutama pada akhir-akhir ini ketika endapan Cilacap akan habis. Karakteristik pantai endapan pasir besi di Cilacap dicirikan oleh urutan pematang pantai berpasir yang dipisahkan oleh lembah-lembah berawa khas pantai maju dan oleh gumuk-gumuk pasir memanjang sejajar dengan garis pantai dengan ketinggian bervariasi dari 0 m hingga 15 m dari muka laut. Endapan pasir besi di daerah ini berasal dari proses denudasi andesit dan “Formasi Andesit Tua” yang kaya akan mineral magnetit dan ilmenit pada pedalaman Cilacap dengan kondisi elevasi curam dan batuan sangat terlapukkan. Muatan sedimen yang tinggi dari Cekungan Serayu di pedalaman tersebut (3.500-4.500 ton/km2/tahun; cekungan Sungai Citarum hanya 800-1.200 ton/km2/tahun) menyebabkan pengendapan yang sangat luas pasir besi di wilayah pantai. Kata kunci: pantai, karakteristik, pasir besi, Cilacap

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 Storm Waves at the Shoreline: When and Where Are Infragravity Waves Important?

2019 ◽  
Vol 7 (5) ◽  
pp. 139 ◽  
Author(s):  
Oliver Billson ◽  
Paul Russell ◽  
Mark Davidson
Keyword(s):  
Deep Water ◽  
Water Wave ◽  
Sandy Beach ◽  
Transport Processes ◽  
Infragravity Waves ◽  
Storm Wave ◽  
Wave Conditions ◽  
Gravel Beaches ◽  
Deep Water Wave ◽  
Sand And Gravel

Infragravity waves (frequency, f = 0.005–0.05 Hz) are known to dominate hydrodynamic and sediment transport processes close to the shoreline on low-sloping sandy beaches, especially when incident waves are large. However, in storm wave conditions, how their importance varies on different beach types, and with different mixes of swell and wind-waves is largely unknown. Here, a new dataset, comprising shoreline video observations from five contrasting sites (one low-sloping sandy beach, two steep gravel beaches, and two compound/mixed sand and gravel beaches), under storm wave conditions (deep water wave height, H0 up to 6.6 m, and peak period, Tp up to 18.2 s), was used to assess: how the importance and dominance of infragravity waves varies at the shoreline? In this previously unstudied combination of wave and morphological conditions, significant infragravity swash heights (Sig) at the shoreline in excess of 0.5 m were consistently observed on all five contrasting beaches. The largest infragravity swash heights were observed on a steep gravel beach, followed by the low-sloping sandy beach, and lowest on the compound/mixed sites. Due to contrasting short wave breaking and dissipation processes, infragravity frequencies were observed to be most dominant over gravity frequencies on the low-sloping sandy beach, occasionally dominant on the gravel beaches, and rarely dominant on the compound/mixed beaches. Existing empirical predictive relationships were shown to parameterize Sig skillfully on the sand and gravel beaches separately. Deep water wave power was found to accurately predict Sig on both the sand and gravel beaches, demonstrating that, under storm wave conditions, the wave heights and periods are the main drivers of infragravity oscillations at the shoreline, with the beach morphology playing a secondary role. The exception to this was the compound/mixed beach sites where shoreline infragravity energy remained low.

The Maintainability of Acehnese by Its Speakers at the Eastern Coast of Serdang Bedagai

2014 ◽  
Vol 11 (1) ◽  
Author(s):  
Hadi Sahputra ◽  
Busmin Gurning ◽  
Syahron Lubis
Keyword(s):  
Qualitative Study ◽  
Key Words ◽  
Language Use ◽  
Language Maintenance ◽  
Language Shift ◽  
Negative Attitude ◽  
Eastern Coast ◽  
Dominant Language ◽  
Long Time ◽  
Key Words Attitudes

This qualitative study is designed to find the Acehnese speakers’ attitude in maintaining Acehnese at the eastern coast of Serdang Bedagai Regency. The subjects are thirty intra-marriage Acehnese speakers living long time the districts. Questionnaire is used to find out their daily attitude in communicating and to gather the data about what language they use in the communications and interaction with their husband or wife, children, brothers and sisters, neighbors, and colleagues. Interview is used to find out the positive and negative attitude. These attitudes are influenced by some factors which are analyzed and can be maintained Acehnese at the eastern coast of Serdang Bedagai Regency, living in Acehnese multi-ethnics, use Acehnese in their family every day, and having pride of their own language, use Acehnese to their neighbors and their colleagues. Currently, the existence of Acehnese is the speakers of Acehnese are at the level of safe but in their children or their generation is at the level of unsafe and it leads to the language shift to a dominant language, that is, Indonesian language as well as Malay language and Javanese language or other local language which are the major population, which dominate the use of vernacular. This is due to the weaknesses of vernacular speakers or the loss of belonging to their own language. Key words: attitudes, language maintenance, language shift, maintainability, vernaculars

XXVII.—The Old Red Sandstone of Shetland. Part II. North-Western Area

1931 ◽  
Vol 56 (3) ◽  
pp. 671-694 ◽  
Author(s):  
T. M. Finlay
Keyword(s):  
Eastern Coast ◽  
Coast Line ◽  
Red Sandstone ◽  
Single Plate ◽  
Fossil Evidence ◽  
Previous Communication ◽  
Western Area ◽  
Important Addition ◽  
Chain Of Evidence ◽  
North Western

In a previous communication an account was given of the sedimentary series exposed along the eastern coast-line of the Shetlands from Rova Head to Sumburgh Head. Fossil evidence was adduced which enabled the position of these beds in the Old Red System to be fixed more definitely than had hitherto been the case; they were shown to be partly of Middle, partly of Upper Old Red Sandstone age, the base of the Rova Head Conglomerate being taken as the dividing line. Since the publication of that paper additional fossils have to be recorded. Examination of the numerous specimens of the Microbrachius from the fish-beds of Shetland fails to reveal any specific distinction between that form and Microbrachius dicki Traq. occurring in the John o' Groat's Sandstone Group, and the Eday Sandstones; it is therefore an important addition to the chain of evidence linking up the Shetland horizon with those of Orkney and the Mainland. An additional record of little stratigraphical value is that of Coccosteus (sp. indet.), a single plate of which was found by Professor W. H. Lang at a horizon slightly below the fish-bed at Shingly Geo, Dunrossness.

scholarly journals Datos sobre la vegetación termófila del litoral oriental de Málaga (España).

2001 ◽  
Vol 26 ◽  
pp. 229-240 ◽  
Author(s):  
Baltasar Cabezudo ◽  
Andrés V. Pérez Latorre
Keyword(s):  
Key Words ◽  
Coastal Area ◽  
Eastern Coast ◽  
Palabras Clave ◽  
Maytenus Senegalensis

New data on the vegetation in the eastern coast of Málaga (Spain). Palabras clave, vegetación, sintaxonomía, Maytenus senegalensis, litoral, Andalucía, España. Key words. vegetation, syntaxonomy, Maytenus senegalensis, coastal area, Andalusia, Spain.

scholarly journals Hydrogeochemical Characteristics and Genesis Model of Jinjiang and Julong Hot Springs in Changbai Mountain, Northeast China

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Baizhong Yan ◽  
Xiujuan Liang ◽  
Changlai Xiao
Keyword(s):  
Hot Springs ◽  
Hot Spring ◽  
Isotope Analysis ◽  
Atmospheric Precipitation ◽  
Changbai Mountain ◽  
Chemical Compositions ◽  
Magma Body ◽  
Volcanic Breccia ◽  
Sand And Gravel ◽  
Genesis Model

Changbai Mountain in China has been explored as a potential area for its rich hot springs including the Jinjiang and Julong hot spring groups. The hydrogeochemical characteristics and conceptual genesis models of the Jinjiang and Julong hot springs were evaluated by hydrogeochemical analysis, isotope analysis, rock sample analysis, hydrogeochemistry simulation, and geophysical exploration method. The results showed that HCO3− and Na+ were the most abundant anion and cation in the hot springs, and the hydrochemical type was Na-HCO3. And the hot springs are enriched with trace components such as H2SiO3 and Sr. The major gas composition of the Jinjiang hot springs and Julong hot springs were CO2, N2, and CH4, which were derived from the mantle. The chemical compositions were produced by feldspar and pyroxene mineral hydrolysis. The recharge source of the hot springs was atmospheric precipitation and was also influenced by evaporation, and the genetic models for the Jinjiang hot springs and Julong hot springs were as follows: the heat source of both was a magma body and heat was mainly migrated in the form of thermal conduction. The cap rocks were both composed of trachyte of Baitoushan formation, basalt of Junjianshan formation, and rhyolitic pyroclastic rocks of Changbai formation. The geothermal reservoir of both hot springs was a fracture zone with the lithology of volcanic breccia, sand, and gravel and volcanic breccia and marble, respectively.

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