scholarly journals Coastal morphological changes in the Red River Delta under increasing natural and anthropic stresses

2019 ◽  
Vol 2 (1) ◽  
pp. 51-71 ◽  
Author(s):  
Daidu Fan ◽  
Dac Ve Nguyen ◽  
Jianfeng Su ◽  
Vuong Van Bui ◽  
Dinh Lan Tran
Keyword(s):  
Coastal Erosion ◽  
Land Reclamation ◽  
Morphological Changes ◽  
River Delta ◽  
Sediment Supply ◽  
Red River ◽  
Coastal Protection ◽  
Mangrove Forests ◽  
Red River Delta ◽  
Sediment Redistribution

River deltas are the best place to study intense human–earth interactions and the resultant morphological changes and sedimentary records. The coastal evolution history of the Red River Delta (RRD) is examined by time-series analysis of multiple coastline locations. We find that spatiotemporal variation in seawall locations and vegetation lines are obviously site-specific due to intense human interference, while changes in 0 m isobaths are highly dependent on external stresses. Coastal erosion and deposition patterns are determined firstly by sediment inputs from different distributaries, and secondly by sediment redistribution with tides, waves, and longshore currents. The causes of chronic erosion along the Hai Hau coast include swift distributary channels, negligible sediment supply by the regional longshore current, and continuous sediment export by local wave-generated longshore and offshore currents. The area of intertidal flats decreased significantly due to land reclamation and decelerating coastal accretion. The area of mangrove forests decreased first due to human deforestation, and then increased gradually due to artificial plantation. Poorly designed coastal infrastructures may increase risks of coastal erosion and flooding disasters. More coastal sectors in the RRD may turn into erosion due to continuous decrease in riverine sediment discharges, deserving more attention on proper coastal protection and management.

Morphological Changes in the Red River Delta, Impacts and Solutions

APAC 2019 ◽  
2019 ◽  
pp. 1201-1205
Author(s):  
T. D. Hoa ◽  
D. H. Nam ◽  
H. V. Cuong
Keyword(s):  
Morphological Changes ◽  
River Delta ◽  
Red River ◽  
Red River Delta

Impact of mangrove age on sediment retention and wave dissipation and its links to ecosystem services in the Red River Delta, Vietnam

2020 ◽  
Author(s):  
Chris Hackney ◽  
Rachael Carrie ◽  
Dao Tan Van ◽  
Joshua Ahmed ◽  
Serena Teasdale ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Agricultural Land ◽  
Storm Surges ◽  
River Delta ◽  
Red River ◽  
Tidal Range ◽  
Mangrove Forests ◽  
Sediment Retention ◽  
Red River Delta ◽  
Sea Levels

<p>Mangroves provide critical ecosystem services that support livelihoods and communities at the coastal margin. They are key natural flood defences to tropical cyclone driven storm surges, they store sediment that is vital for maintaining delta surface elevations in the face of rising sea levels, and transfer key nutrients to agricultural land. Over the past few decades, stressors on mangroves have increased with associated declines in global areal extent, and growing concern about their condition, including for forests that have been restored or afforested. Most remaining mangrove forests comprises a mix of ages and quality. Limited research exists exploring how differing age, structure and health of mangroves impacts sediment retention and aids the dissipation of wave and storm energy, and links these physical processes to the delivery of ecosystem services.</p><p> </p><p>In this study, we demonstrate how mangrove age and health differentially impacts rates of sedimentation, attenuates water level and tidal propagation and aids storm energy dissipation along a section of mangrove forest in Thai Binh province on the Red River Delta in Vietnam. Data were collected over a four month period and highlight spatially variable responses to tides and the increasing influence of the nearby Thai Binh River. We show that sedimentation rates vary from 0.8 m/yr to 0.14 m/yr with increasing distance inland, whilst peak tidal range varies from 1.5 m to 0.5 m with mangrove age.  We demonstrate that these spatial patterns correlate not only to distance inland, but also mangrove age, and the provision of ecosystem services as recorded by household surveys from local communities. This highlights the need for global mangrove databases to account for mangrove quality and health data in order to capture definitively the ecological, hydrodynamic and sedimentological impacts of mangrove forests on coastal and deltaic regions.</p>

Coastal Protection Strategies for the Red River Delta

2009 ◽  
Vol 251 ◽  
pp. 105-116 ◽  
Author(s):  
Cong V. Mai ◽  
Marcel J. F. Stive ◽  
Pieter H. A. J. M. Van Gelder
Keyword(s):  
River Delta ◽  
Red River ◽  
Coastal Protection ◽  
Red River Delta ◽  
Protection Strategies

Mapping mangrove forests in the Red River Delta, Vietnam

2021 ◽  
Vol 483 ◽  
pp. 118910
Author(s):  
Chuqi Long ◽  
Zhijun Dai ◽  
Xiaoyan Zhou ◽  
Xuefei Mei ◽  
Cong Mai Van
Keyword(s):  
River Delta ◽  
Red River ◽  
Mangrove Forests ◽  
Red River Delta

scholarly journals Depth Profiles of Microplastics in Sediment Cores from Two Mangrove Forests in Northern Vietnam

2021 ◽  
Vol 9 (12) ◽  
pp. 1381
Author(s):  
Luu Viet Dung ◽  
Truong Huu Duc ◽  
Le Thi Khanh Linh ◽  
Trinh Thi Dieu Ly ◽  
Hoang Anh Duong ◽  
...  
Keyword(s):  
Anthropogenic Activities ◽  
Sediment Cores ◽  
River Delta ◽  
Red River ◽  
Modern World ◽  
Mangrove Forests ◽  
Plastic Pollution ◽  
Red River Delta ◽  
Aquatic Life ◽  
Northern Vietnam

Plastics are essential materials that play critical roles in people’s lives in the modern world. However, plastic pollution in the ocean has become a critical environmental problem due to the fact of its durability and long life span. In the present study, we analyze the contamination of microplastics in sediment cores from mangrove forests of the Red River Delta and Tien Yen Bay in Northern Vietnam. The results showed that the concentration of microplastics in sediment cores ranged from 0 to 4941 particles/kg, with four types of microplastics: microfiber, microfragment, microfoam, and microfilm. Microplastics were not observed in sediment samples lower than 65 and 70 cm core depth in sediment cores from the Tien Yen Bay and Red River Delta. The microplastic concentration in sediment cores from the Red River Delta was significantly higher than those of Tien Yen Bay, reflecting the influence of anthropogenic activities on microplastics pollution. The present results highlight that the accumulation of microplastics may have occurred a long time ago and tends to increase in the future. Further investigation on microplastic accumulation rates, sources of microplastics, and reducing plastic pollution is necessary to minimize the impacts of microplastic pollution on aquatic life and the environment.

Climate Change and Land Use Change of Rural Households in The Red River Delta, Vietnam

2013 ◽  
pp. 79-94
Author(s):  
Ngoc Luu Bich
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Agricultural Land ◽  
Rural Households ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Sea Levels ◽  
Main Production ◽  
Farming Households

Climate change (CC) and its impacts on the socio-economy and the development of communities has become an issue causing very special concern. The rise in global temperatures, in sea levels, extreme weather phenomena, and salinization have occurred more and more and have directly influenced the livelihoods of rural households in the Red River Delta – one of the two regions projected to suffer strongly from climate change in Vietnam. For farming households in this region, the major and traditional livelihoods are based on main production materials as agricultural land, or aquacultural water surface Changes in the land use of rural households in the Red River Delta during recent times was influenced strongly by the Renovation policy in agriculture as well as the process of industrialization and modernization in the country. Climate change over the past 5 years (2005-2011) has started influencing household land use with the concrete manifestations being the reduction of the area cultivated and the changing of the purpose of land use.

Phosphate immobilisation dynamics and interaction with arsenic sorption at redox transition zones in floodplain aquifers: Insights from the Red River Delta, Vietnam

2021 ◽  
Vol 411 ◽  
pp. 125128
Author(s):  
Harald Neidhardt ◽  
Sebastian Rudischer ◽  
Elisabeth Eiche ◽  
Magnus Schneider ◽  
Emiliano Stopelli ◽  
...  
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Transition Zones ◽  
Redox Transition
Sign in / Sign up

Export Citation Format

Share Document