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.

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.

Monitoring of Inorganic Nitrogen Levels in the Surface and Ground Water of the Red River Delta, Northern Vietnam

2004 ◽  
Vol 35 (11-12) ◽  
pp. 1645-1662 ◽  
Author(s):  
Kiyoshi Kurosawa ◽  
Do Nguyen Hai ◽  
Nguyen Huu Thanh ◽  
Ho Thi Lam Tra ◽  
Nguyen Tat Canh ◽  
...  
Keyword(s):  
Ground Water ◽  
Inorganic Nitrogen ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Northern Vietnam ◽  
Nitrogen Levels

Impact of anthropogenic activities on water quality and plankton communities in the Day River (Red River Delta, Vietnam)

2018 ◽  
Vol 190 (2) ◽  
Author(s):  
Hang Thi Thu Hoang ◽  
Thi Thuy Duong ◽  
Kien Trung Nguyen ◽  
Quynh Thi Phuong Le ◽  
Minh Thi Nguyet Luu ◽  
...  
Keyword(s):  
Water Quality ◽  
Anthropogenic Activities ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Plankton Communities

Hydrological regime and water budget of the Red River Delta (Northern Vietnam)

2010 ◽  
Vol 37 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Thi Nguyet Minh Luu ◽  
Josette Garnier ◽  
Gilles Billen ◽  
Didier Orange ◽  
Julien Némery ◽  
...  
Keyword(s):  
Water Budget ◽  
Hydrological Regime ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Northern Vietnam

scholarly journals N, P, Si budgets for the Red River Delta (northern Vietnam): how the delta affects river nutrient delivery to the sea

2010 ◽  
Vol 107 (1-3) ◽  
pp. 241-259 ◽  
Author(s):  
Thi Nguyet Minh Luu ◽  
Josette Garnier ◽  
Gilles Billen ◽  
Thi Phuong Quynh Le ◽  
Julien Nemery ◽  
...  
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Nutrient Delivery ◽  
Northern Vietnam

The Changing Nature of the Red River Delta Villages during the Lê Period (1428–1788)

2001 ◽  
Vol 32 (2) ◽  
pp. 151-172
Author(s):  
Insun Yu
Keyword(s):  
Central Government ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Northern Vietnam ◽  
Administrative Institution ◽  
Strong Control ◽  
The Village

Over the 400 years of the Lê dynasty (1428–1788), the village in northern Vietnam progressively evolved as an administrative institution. The article traces this process, and analyses the changing relationship between villages and the central government, contrasting the early decades of the dynasty when the court exercised strong control over the village with later centuries when the trend was towards autonomy.

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