scholarly journals Numerical study of sediment transport in Thu-Bon estuary and coastal areas of Hoi-An City

2022 ◽  
Vol 964 (1) ◽  
pp. 012001
Author(s):  
Nguyen Thong ◽  
Ho Tuan Duc ◽  
Phan Quang Hung ◽  
Tran Hai Yen
Keyword(s):  
Sediment Transport ◽  
Numerical Study ◽  
Monsoon Season ◽  
Sand Dunes ◽  
Coastal Areas ◽  
Main Trend ◽  
North Coast ◽  
Northeast Monsoon ◽  
The North ◽  
Depth Study

Abstract The area of Cua-Dai estuary and the coastal areas of Hoi-An City have experienced complicated erosion and sedimentation in recent years. Along the coast of Hoi-An, erosion often occurs, whereas in the area of Cua-Dai River, there is an accretion phenomenon that obstructs the waterway navigation from Cua-Dai to Cu-Lao-Cham. Occurrence of sand dunes in the offshore location of Cua-Dai has been recorded at a number of times in recent years. Studying the process of bed morphological change due to the sediment transport in the Thu-Bon river and the influence of monsoons in the area allows to explain the above phenomenon thus an in-depth study to propose appropriate solutions. This study used the numerical model Telemac which combines the hydro-morphodynamic and wave modules. The simulation results show that the main trend of coastal currents caused by tides and waves tends to go southward, leading to coastal erosion especially in the northeast monsoon season as well as sedimentation in the estuarine area. In addition, the model also shows the crucial role of waves in shoreline erosion, with the degree of erosion in the north coast near Cua-Dai being more severe than the southern coast, through the formation of local eddy flow on the north coast.

scholarly journals Human Impacts on Estuarine Erosion-Deposition in Southern Central Vietnam: Observation and Hydrodynamic Simulation

2021 ◽  
Vol 13 (15) ◽  
pp. 8303
Author(s):  
Vu Tuan Anh ◽  
Pham Ba Trung ◽  
Kim-Anh Nguyen ◽  
Yuei-An Liou ◽  
Minh-Thu Phan
Keyword(s):  
Deposition Process ◽  
Southwest Monsoon ◽  
North Coast ◽  
Northeast Monsoon ◽  
Southern Coast ◽  
Erosion Processes ◽  
The North ◽  
Central Vietnam ◽  
Southern Central ◽  
Deposition Processes

This paper aims to identify the causes and sources of erosion and deposition at small estuaries in southern central Vietnam under human intervention. The jetty built at the Tam Quan river mouth (Binh Dinh Province, Vietnam) serves as the base for the study. After its completion at the end of 2009, the hydrodynamic and erosion-deposition processes in the region have been significantly altered. Inside the estuary, the waves are not influenced, but the currents are increased during the ebb tide period and decreased during the flood tide timeframe. During the southwest monsoon, the jetty could cause an increase in the deposition process in both frequency and area, whereas the erosion process tends to narrow the area and increase the frequency on the north coast. In contrast, both deposition and erosion processes are increased on the southern coast. About 5859 m3 of sediments are deposited in the channel gate mainly by local sources. During the northeast monsoon, both deposition and erosion processes are located over a narrow area with frequency increased on the north coast, whereas the deposition process is narrowed with higher frequency on the southern coast. The total amount of sediment deposited at the estuary is 56,446 m3, of which 74.2% is from the onsite erosion material, 15.8% from the river and 10% from the longshore transportation. Generally, due to mainly erosion-deposition processes, sediment volume is accumulated during the northeast monsoon with amount 9.6 times more than that the southwest monsoon. The erosion-deposition processes are contributed to by poor practical management and local human activities inland and in the coastal regions, as well as the natural situation, resulting in serious impacts on society, the economy and the environment. Hence, the governance of the erosion-deposition processes and sediment load in small estuaries appear to contribute to the master plan for the local sustainable development of society and the economy.

scholarly journals Women and Organizational Capabilities in Seaweed Production in North Gorontalo

2018 ◽  
Vol 34 (1) ◽  
pp. 1-10
Author(s):  
Sukarman Kamuli ◽  
Basri Amin
Keyword(s):  
Coastal Areas ◽  
Government Support ◽  
Organizational Capabilities ◽  
North Coast ◽  
Research Approach ◽  
Women's Associations ◽  
The North ◽  
Seaweed Production ◽  
The Government ◽  
Organizational Patterns

Despite the government support for economic development in some coastal areas in Indonesia, the paradigm about women’s agency remains almost the same. This is because women are still marginalized. This paper focuses on looking at agency of women in managing their resources. This study proves that women are active agents in coastal areas of North Gorontalo. Specifically, in the seaweed production, empirical evidences show significantly that women's associations succeeded in gaining economic advantages, participatory leadership, and had adaptability towards changes in technology and seaweed market. Applying a qualitative research approach, this study illustrates a number of policy subjects, organizational patterns, regional opportunity, and actors that support the centrality of women’s organizational capabilities in the field of seaweed production in the north coast of Gorontalo. This study justifies the tendency in Gorontalo, and perhaps in other areas in Indonesia, that women groups have an economic reputation in the seaweed production because they are fully involved in all production processes.

scholarly journals Diversity and distribution of microalgae in coastal areas of East Java, Indonesia

2020 ◽  
Vol 21 (3) ◽  
Author(s):  
UMI ZAKIYAH ◽  
MULYANTO ◽  
LUCIA TRI SUWANTI ◽  
MOCHAMAD DONNY KOERNIAWAN ◽  
EKO AGUS SUYONO ◽  
...  
Keyword(s):  
Human Activities ◽  
Diversity Index ◽  
Renewable Energy Sources ◽  
Biodiversity Loss ◽  
Coastal Areas ◽  
South Coast ◽  
North Coast ◽  
The North ◽  
Anthropogenic Development ◽  
North And South

Abstract. Zakiyah U, Mulyanto, Suwanti LT, Koerniawan MD, Suyono EA, Budiman A, Siregar UJ. 2020. Diversity and distribution of microalgae in coastal areas of East Java, Indonesia. Biodiversitas 21: 1149-1159. Indonesia is well known as one of hotspot for biodiversity, including marine resources. However, Indonesia biodiversity has declined rapidly due to the changes in the aquatic environmental quality as the consequence of human activities. Biodiversity loss has been well studied in larger organisms, however, less is known for microorganisms, such as microalgae. Microalgae have received much attention recently due to its potential as renewable energy sources. This study aimed at describing biodiversity and distribution of microalgae in coastal areas of East Java and Madura, Indonesia. Six sites, i.e. Trenggalek and Sendangbiru representing south coast, Banyuwangi and Situbondo representing north coast of East Java, Pasongsongan and Pamekasan representing Madura north and south coast, respectively were sampled, which representing different background of anthropogenic development in these areas. Results showed that seawater condition in all sites is still good, with average pH 8.0 despite intense human activities, such as ecotourism, fishing and boat harbor, as well as residential area that has the potential to produce a lot of waste. Totally, there were 35 genera from all locations with varying abundance in each location and diversity index ranging from 1.105-3.312. Although most genera belonged to Bacyllariophyta, domination indices showed that there was not any single specific domination in all locations. Morisita indices showed that most distribution gave positive values indicating clumped dispersion of microalgae in all locations. Higher Shannon-Weaver indices characterized the south coast of East Java and Madura compared to the north coast of East Java area, which corresponded with lower dominancy indices.

scholarly journals A numerical study of the transport and diffusion of coastal pollutants during the breeze cycle in the Island of Mallorca

1996 ◽  
Vol 14 (3) ◽  
pp. 351-363 ◽  
Author(s):  
R. Romero ◽  
C. Ramis
Keyword(s):  
Numerical Study ◽  
Ground Level ◽  
North Coast ◽  
Land Breeze ◽  
Local Circulation ◽  
Physical Mechanisms ◽  
The North ◽  
Ground Level Concentration ◽  
Transport And Diffusion ◽  
Reactive Pollutant

Abstract. An Eulerian study of the distribution over the Island of Mallorca of a non-reactive pollutant (SO2) emitted from an electric power plant operating at present on the north coast is performed using a meso-β numerical model, paying particular attention to the diffusive physical mechanisms. The study is applied to the conditions of sea-land breeze development. This is a local circulation that dominates the flow during the summer and favours transporting pollutants from the coast toward the centre of the island. Results indicate that values of the ground-level concentration higher than 5 μ g/m3 are restricted over a limited and mountainous region during the whole diurnal cycle. However, when the simulation is carried out with the inclusion of a twin electric plant which may be built on the south coast, the affected area becomes larger, especially early in the morning, when air over the island is sinking as a consequence of the land breeze development. The inclusion of dry deposition in the simulations does not produce important changes in the spatial and temporal evolution of the ground-level concentration.

Effect on Trend of Coastal Geomorphological Evolution after Construction of Artificial Islands in Longkou Bay

2013 ◽  
Vol 726-731 ◽  
pp. 3308-3312 ◽  
Author(s):  
Yong Ning An ◽  
Kun Yang ◽  
Ying Wang ◽  
Jing Li
Keyword(s):  
Sediment Transport ◽  
Historical Data ◽  
Transport Rate ◽  
Coastal Sediment ◽  
North Coast ◽  
Shadow Zone ◽  
Erosion And Deposition ◽  
The North ◽  
Coastal Sediment Transport ◽  
Geomorphological Evolution

By calculating coastal sediment transport rate and analyzing historical data in this paper, the effect on trend of coastal geomorphological evolution after the construction of the artificial islands in Longkou Bay is studied. The results show that the north coast of artificial islands is in a state of equilibrium in sediments erosion and deposition, the channel between land and islands is in strong deposited state, the coast erosion degree outside of the wave shadow zone where in the south of Jie River has been strengthened. The deposited rate caused by sediments that the Jie River carried and coastal sediment transported in the channel between land and islands is about 12.5cm/a after the construction of artificial islands.

scholarly journals Pengelolaan Pariwisata Bahari berbasis Community-Based Tourism dalam Peningkatan Ekonomi Masyarakat Pesisir

Media Wisata ◽  
2021 ◽  
Vol 18 (1) ◽  
pp. 1-20
Author(s):  
Rullyana Puspitaningrum Mamengko ◽  
Erlina Daru Kuntari
Keyword(s):  
Community Involvement ◽  
Coastal Areas ◽  
North Coast ◽  
Community Based ◽  
Research Technology ◽  
The North ◽  
Central Java ◽  
Tourism Management ◽  
Qualitative Descriptive ◽  
Selection Stage

This study aimed to determine the importance of community-based tourism management in increasing the economic income of coastal communities in the coastal areas of the North Coast of Central Java. This research was funded by the Directorate of Research and Community Service (DRPM) of the Ministry of Research, Technology and Higher Education. This research is a qualitative descriptive study with research procedures, namely the description stage, the reduction stage, and the selection stage. The research location is in the coastal area of the North Coast of Central Java with randomly selected respondents. The results obtained are the multiplayer effect of community involvement in marine tourism management in coastal areas, including increased community income, absorption of local workers, the opening of business space for local communities, maintaining the surrounding environment, and improving other supporting amenities.

scholarly journals PRINSIP-PRINSIP PENANGGULANGAN KEMISKINAN DI WILAYAH PESISIR UTARA JAWA TENGAH

2017 ◽  
Vol 2 (2) ◽  
pp. 81 ◽  
Author(s):  
Arif Sofianto
Keyword(s):  
Community Involvement ◽  
Poverty Reduction ◽  
Coastal Areas ◽  
Linear Process ◽  
North Coast ◽  
Observation Data ◽  
The North ◽  
Central Java ◽  
Cultural Themes ◽  
Common Interests

Masyarakat pesisir merupakan salah satu kelompok termiskin. Kebijakan-kebijakan yang telah dilaksanakan di kawasan pesisir sering mengakibatkan beberapa kondisi berupa perusakan ekologi, kesenjangan dan kemiskinan nelayan tradisional, serta ketergantungan masyarakat terhadap pemodal. Penelitian ini bertujuan untuk memahami kebutuhan penanggulangan kemiskinan pada wilayah pesisir sesuai dengan karakteristik dan kebutuhan masyarakat. Jenis penelitian adalah deskriptif kualitatif. Lokasi penelitian dilaksanakan di Kecamatan Juwana dan Margoyoso di Kabupaten Pati, serta Kecamatan Ulujami di Kabupaten Pemalang. Informan penelitian ini berjumlah 100 orang terdiri dari unsur pemerintah daerah, lembaga masyarakat, koperasi, nelayan, petambak, pengolah hasil perikanan dan petani. Teknik pengumpulan data menggunakan wawancara, FGD dan Observasi. Teknik analisisdata menggunakan model yang dikembangkan oleh Spradley, yang merupakan kesatuan proses linear yang dimulai dari analisis domain, analisis taksonomi, analisis komponensial dan analisis tema budaya.Kesimpulan dari penelitian ini adalah model penanggulangan kemiskinan pada masyarakat pesisir utara Jawa Tengah berupa konsep pemberdayaan yang mengutamakan prinsip a). Komitmen pada keyakinan, nilai, adat kebiasaan, kepentingan bersama, b). Menciptakan keterbukaan, kejujuran, solidaritas dan pelibatan masyarakat. Tittle: Need For Poverty Reduction In North Coastal Areas In Central JavaThe coastal communities is one of the main groups of the poorest. The policies that have been implemented in coastal areas often result in some circumstances as ecological destruction, poverty gap and traditional fishing, as well as public dependence on financiers. This study aims to understand the need to reduce poverty in coastal areas according to the characteristics and needs of the community. This type of research is qualitative descriptive. The location of research in the Juwana and Margoyoso sub district in Pati Regency, and the Ulujami Subdistrict in Pemalang Regency. The informants of 100 people consisting of representatives from local government, community organizations, cooperatives, fishermen, farmers, fishpond farmers, and fish processors. The technique of collecting data using interviews, focus group discussions and observation. Data were analyzed using a model developed by Spradley, which is the unity of a linear process that starts from domain analysis, taxonomic analysis, componential analysis and analysis of cultural themes. The conclusion of this study is a model of addressing poverty in the north coast of Central Java community a concept that promotes empowerment principle a). Commitment to the beliefs, values, customs, common interests, b). Create transparency, honesty, solidarity and community involvement.

scholarly journals Eco-Geography of Coastal Areas: Sosio-Economy Dynamic of Land Ownership of Coastal Areas of Indonesia

2004 ◽  
Vol 11 (2) ◽  
Author(s):  
M Baiquni
Keyword(s):  
Coastal Area ◽  
Social Economy ◽  
Coastal Areas ◽  
North Coast ◽  
New Order ◽  
Industrial Growth ◽  
The North ◽  
Ocean Ecosystem ◽  
Simple Technology ◽  
In The Beginning

Indonesia constitute an archipelagic state which passesses resource of ocean, ecosystem of coast area and social economy dynamics of various maritime society. The nation of Indonesia had ever been welknown as a maritime nation which dominated Nusantara territorial waters as far as neighbour state. Fish cultivation in embankruent  system has been being known since the era of Mojopahit Kingdom and likewise boat industry was held along the north-oast of Java which was ever glorius in the beginning of Dutch Colonialism. But, up to now why a large part of Indonesian fishermen are still using simple technology and method in fishery and fish cultivation? Change in policy within Dutch era development. Which was farm land oriented and plantation had influenced the maritime tradition slip off. Opening of railway and land tract transportation in Java had changed economic ativity pattern of the oast area to hinterland. Investment and human resource were councentrated to farmland development and plantation was directed to export so that it affected the coast area slip off which was basically fishery activity. Development after independence, mainly in the era of New Order, it started from farming activity raised to industry society. Coastal area came back to develop with industrial growth in the urbans of Java north coast. Nevertheless development in fishery does not yet return to show the sign of glorious untill the end of this age. It is  hoped that, with properly judment of the islands coastal area out of Java, goverment will direct  its policy and investment to develop the new maritime society to go against the glorious in the 21st century.

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