scholarly journals Coastal Dynamic and Evolution

2021 ◽  
Keyword(s):  
Coastal Dynamic

scholarly journals STUDY OF SHORELINE CHANGES AT JENEBERANG RIVER DELTA, MAKASSAR

2011 ◽  
Vol 3 (2) ◽  
Author(s):  
Sakka Sakka ◽  
Mulia Purba ◽  
I Wayan Nurjaya ◽  
Hidayat Pawitan ◽  
Vincentius P. Siregar
Keyword(s):  
Sediment Transport ◽  
Wave Energy ◽  
Breaking Waves ◽  
Shoreline Changes ◽  
Bay Area ◽  
The North ◽  
Longshore Sediment Transport ◽  
A Cell ◽  
Coastal Dynamic ◽  
The Difference

The study of shoreline changes during 1990 - 2008 in the delta of the River Jeneberang, Makassar was conducted by evaluating sediment transport into and out of a cell. Longshore sediment transport was computed by considering the influence of heights and angles of the breaking waves. Results of calculation of sediment transport showed that the dominant of sediment transport was to the north during the arrival of the southwest and west waves, and to the south when the wave coming from the northwest. Comparison between shore profiles resulting from model and coastline satellite imagery showed similarity. The difference between the two tend to be occurred at the head land part of the shoreline. This was due to complexity of coastal dynamic at the area. The results of the 19 years shoreline simulation showed that there was a tendency of abrasion at the upsteam head land part as the wave energy tend to converge and accretion at the bay part as the wave energy tend to diverge. Abrasion mainly occurred at Tanjung Bunga (head land) where the coast retreat 181.1 m. Accretion occur in the bay area (Tanjung Merdeka) where the coast advance to the sea for about 59.8 m. The shoreline tend to be stable when the profile was straight such as Barombong Coast.Keywords: abrasion, accretion, sediment transport, shoreline changes.

scholarly journals Geoarchaeological and Paleo-Hydrological Overview of the Central-Western Mediterranean Early Neolithic Human–Environment Interactions

2021 ◽  
Vol 7 (1) ◽  
pp. 1371-1397
Author(s):  
Jean-Francois Berger
Keyword(s):  
Climate Change ◽  
Western Mediterranean ◽  
Comparative Approach ◽  
Early Neolithic ◽  
River Systems ◽  
Human Environment ◽  
Environmental Processes ◽  
Research Perspectives ◽  
Coastal Dynamic ◽  
New Research

Abstract Climate change is still a subject of debate for archaeologist-neolithicists. Its exact chronology, internal pattern, variations in space and time, and impacts on sites and ecosystems and on coastal dynamic and river systems have yet to be assessed. Only a strict comparative approach at high chronological resolution will allow us to make progress on the causality of the socio-environmental processes at work during Neolithisation. Post-depositional impacts on the Early Neolithic hidden reserve also remain underestimated, which has led to the perpetuation of terms such as “Macedonian desert” and “archaeological silence” in the literature on the Neolithic. Off-site geoarchaeological and paleoenvironmental approaches provide some answers to these questions and opens up new research perspectives.

Coastal dynamic and shoreline mapping: multi-sources spatial data analysis in Semarang Indonesia

2007 ◽  
Vol 142 (1-3) ◽  
pp. 297-308 ◽  
Author(s):  
Muh Aris Marfai ◽  
Hussein Almohammad ◽  
Sudip Dey ◽  
Budi Susanto ◽  
Lorenz King
Keyword(s):  
Data Analysis ◽  
Spatial Data ◽  
Spatial Data Analysis ◽  
Shoreline Mapping ◽  
Coastal Dynamic

scholarly journals Snow Patches and Their Influence on Coastal Erosion at Baydaratskaya Bay Coast, Kara Sea, Russian Arctic

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1432
Author(s):  
Daria Bogatova (Aleksyutina) ◽  
Sergey Buldovich ◽  
Vanda Khilimonyuk
Keyword(s):  
Temperature Regime ◽  
Thick Layer ◽  
Freezing Temperature ◽  
Kara Sea ◽  
Ground Temperature ◽  
The Arctic ◽  
Russian Arctic ◽  
Coastal Slope ◽  
Coastal Dynamic ◽  
Snow Thickness

The Arctic coastal environment is a very dynamic system and sensitive to any changes. In our research we demonstrate that nivation (snow patch activity) impacts the Arctic landscape especially in the coastal dynamic at the western part of Russian Arctic. During fieldwork, snowbanks were described and studied and their qualitative role in the development of coastal systems was revealed for Baydaratskaya Bay coast, the Kara Sea. On one side, the large snow cover protects the coastal slope from thermodenudation and thermoabrasion; on the other side, a thick layer of snow affects the ground temperature regime. During snow melting, snow patches contribute to the removal of material from the coastal slope. The quantitative effect of snow on the ground temperature regime was assessed according to numerical simulations. The critical snow thickness was determined based on a calculation. Critical snow thicknesses based on simulation and field data correlated well. The numerical simulation showed the talik formation under the snow patch. Talik size essentially depends on the freezing temperature of sediment (influenced by salinity). The changes of ground temperature regime might further generate thawing settlement of sediment under snow and contribute to beach topography, which might be a trigger for thermoabrasion.

scholarly journals The dynamic coastal evidence of Jakarta Bay during Late Pleistocene-Recent

2021 ◽  
Vol 930 (1) ◽  
pp. 012002
Author(s):  
F Novico ◽  
C Endyana ◽  
D Menier ◽  
M Mathew ◽  
I Kurniawan ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Pleistocene ◽  
Climatic Variability ◽  
Line Drawing ◽  
Sea Level Changes ◽  
Top Down ◽  
Seismic Records ◽  
Coastal Dynamic ◽  
Map Series ◽  
Seismic Reflectors

Abstract Some significant indication identifying a coastal dynamic during Late Pleistocene to Recent is the evolution of isochrone patterns throughout glacial-interglacial stages. This study aims to identify the sediments stratification of Jakarta Bay during the Late Pleistocene – Recent in the framework of coastal dynamic triggered by the sea-level changes of last prominent climatic stages. The several high-resolution seismic records in Jakarta Bay lines were interpreted to illustrate the different sequences from the top down to the oldest by line-drawing the more robust seismic reflectors as a sequence limit surface. Furthermore, the isochrone map series of unit boundary (UB) were reconstructed to delineate isochrone contour patterns from the oldest until modern. The selected isochrones map of UB-3 and UB-5 with their unit facies are somehow favorable to be compared for observing the coastal dynamic of Jakarta Bay during the last climatic variability. Finally, the coastal dynamic of Jakarta Bay is discovered by the movement series of isochrones contour patterns that correspond to the sea-level changes during the last prominent glacial-interglacial stages.

scholarly journals THE DEVELOPMENT OF PORONG ESTUARY

2016 ◽  
Vol 23 (1) ◽  
pp. 40
Author(s):  
Undang Hernawan
Keyword(s):  
Land Use ◽  
Coastal Zone ◽  
Field Survey ◽  
Image Data ◽  
Data Interpretation ◽  
Main Stream ◽  
Muddy Sediment ◽  
Current Development ◽  
Minor Influence ◽  
Coastal Dynamic

Coastal zone is an area of interaction between the land and the sea. Coastal dynamic is influenced by many factors, such as sedimentation and current. Development of an area in the coastal zone such as estuary is also influenced by suck factors. Development of porong estuary is analyzed by interpretation of Image data, i.e. Landsat TM data that acquired in July, 29th 1975, August, 17th 1994, August, 17th 2000, May, 19th 2002 and Quickbird imagery that acquired in April, 25th 2008. Field survey has been done on April 2008. Based on data interpretation, there are accretion and abrasion in this area. The accretion in the southern part of Porong estuary between 1975 – 2008 is about 33.15 km or about 3.15 km/year equivalent to 1,492.29 Ha. The abrasion area in the northern part of Porong estuary in 33 years since 1975 till 2008 is around 0.5 km or aproximately 15.15 m/year equivalent to 222.45 Ha of wide or 6.802 Ha/year. Development of Porong delta, especially in the southern part of Porong estuary, is caused by change of pattern and main stream of Porong River from the noth to the south. This river delivered large volume of sediments and precipated at this area without or minor influence from the sea. Porong delta is a fluvial delta. Coastal characteristic is mangrove, muddy sediment and locally is sand sediment. Land use in this area is fish pond and mangrove. Key words: Porong estuary, Satellite imagery Pantai/pesisir merupakan wilayah antara daratan dan lautan yang masih dipengaruhi oleh keduanya. Dinamika pantai akan dipengaruhi oleh faktor-faktor dari daratan seperti sedimentasi dan faktor dari lautan seperti arus. Demikian halnya perkembangan suatu daerah di pesisir, seperti daerah muara, dipengaruhi oleh daratan dan lautan. Perkembangan muara Porong dianalisis berdasarkan interpretasi citra satelit, yaitu Landsat hasil perekaman 29 Juli 1975, 17 Agustus 1994, 17 Agustus 2004, 19 Mei 2002 dan citra Quickbird perekaman 25 April 2008. Survey lapangan dilaksanakan pada bulan April 2008. Berdasarkan interpretasi citra, ditemukan daerah akresi dan abrasi pada daerah penelitian. Daerah akresi ditemukan di bagian selatan daerah penelitian yaitu sekitar 33.15 km selama 1975–2008 atau sekitar 3.15 km/tahun dengan luasan sekitar 1,492.29 Ha. Daerah abrasi umumnya terdapat di muara Kali Porong sebelah utara, yaitu sejauh 0.5 km selama 33 tahun atau kira-kira 15.15 m/tahun dengan luasan 222.45 Ha atau sekitar 6.802 Ha/tahun. Perkembangan muara dan delta Porong, terutama di muara sebelah selatan, diperkirakan karena adanya perubahan arah utama Sungai Porong, yang berubah dari arah utara kea rah selatan. Aliran sungai ini membawa banyak sedimen dan diendapkan pada daerah ini, karena tiada atau kurangnya pengaruh dari laut. Delta Porong termasuk kawasan delta fluvial. Karakteristik daerah pantai umumnya berlumpur dengan setempat berupa pasir. Penggunaan lahan pada daerah ini umumnya berupa tambak dan mangrove. Kata Kunci : Delta Porong, citra Satelit

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