Bui Hong Long

The South Vietnam Upwelling (SVU) develops in the South China Sea (SCS) under the influence of southwest monsoon winds. To study the role of small spatiotemporal scales on the SVU functioning and variability, a simulation was performed over 2009–2018 with a high-resolution configuration (1 km at the coast) of the SYMPHONIE model implemented over th...

Upwelling is an oceanographic phenomenon that involves the physical process and contributes to changes in chemistry, biology, and natural resources. So, systematically, it is the particular ecosystems of whole marine regions with the upwelling. The strong upwelling waters in South Central Regions of Vietnam have uncertain features of the East Vietn...

The South Vietnam Upwelling (SVU) develops in the South China Sea off the Vietnamese coast under the influence of southwest monsoon winds. A very high resolution configuration (1 km at the coast) of the SYMPHONIE model was developed over the western coastal region of the South China Sea. A simulation was performed over the period 2009–2018 to study...

The iron and manganese content in marine water is very small but the volume of ferromanganese nodules contributes 30% of the total mass of polymetallic nodules and crusts in marine and ocean floor. This suggests that the process of enrichment of ferromanganese crusts and nodules is not only contributed by chemical processes but also by oceanographi...

Water exchange plays a vital role in controlling water quality and the assessment of environmental carrying capacity for marine spatial planning. Water exchange in water bodies is determined by residence time. A comparative study of the different residence times in the coastal waters of Vietnam by radioactivity, numerical dynamic modeling, and land...

Ngày nhận bài: 5-8-2018; Ngày chấp nhận đăng: 16-12-2018 Tóm tắt. Nghiên cứu các đặc trưng và biến động của các khối nước mang ý nghĩa thực tiễn to lớn trong việc xác định nguồn gốc nhằm có cái nhìn tổng quan nhất về chế độ thủy văn-động lực khu vực đó, giúp phân vùng khối nước phục vụ cho việc khai thác hợp lý nguồn lợi và bảo vệ môi trường. Vấn đ...

Analysis of sea water levels (SWL) data at the Cau Da Oceanographic Station for 42 years (1975–2016) showed that the rising trend of SWL had occurred from 1999. During the 42-year period, the annual mean SWLs were lowest in 1988 and 1998. The recorded special feature showed that since 2006 (2006–2016) the annual mean SWLs were above the longtime me...

Nha Trang bay is considered one of the 29 most beautiful bays in the world. This is a coastal area with potential for tourism development with many beautiful clean beaches and dozens of large and small islands. In 2016, Nha Trang has attracted 5 million tourists including 1.2 million international tourists. Recently, while the development of touris...

Based on the data collected at the Cau Da station, The Regional Ocean Modeling System (ROMS model) is applied for hydrodynamic systems (such as, circulation and temperature – salinity) in Binh Cang - Nha Trang bay, Vietnam. The results present the several cases of hydrodynamic regimes in the Bay during two mainly monsoon seasons (northeast and sout...

Based on the data collected at the Cau Da station, the Regional Ocean Modeling System (ROMS) is applied for hydrodynamics (e.g. circulation and temperature-salinity) in Binh Cang - Nha Trang Bay, Vietnam. The results present the several cases of hydrodynamic regimes in the Bay during two mainly monsoon seasons (northeast and southwest monsoons). Th...

Typhoon Damrey (Vietnamese name is Typhoon No.12 in 2017) landed in South Phu Yen - North Khanh Hoa provinces in the morning of 4th Nov 2017 causing severe damage to people, material and serious consequences on the social and economy of the region (especially Khanh Hoa Province). So far, there have been no published papers and reports on the result...

Tropical depressions/cyclones are natural phenomena which might impact negatively on human beings and the environment. Like other natural hazards, they sometimes can cause severe damage to the economy, infrastructure and community so that the benefits that come along with such hazards have almost been neglected. On the land, rainfall during and aft...

This paper has focused on analyzing morphological change features of Nha Trang Beach based on the comparison of different beach profiles which were measured from July 2008 to September 2016 corresponding to the Northeast and Southwest monsoons. Additionally, the sediment transport balance was estimated by the method of equity value curve. Studied r...

In this paper, our aim was to examine the role of ENSO in the recent climate variations. Analyzed results on temporal variability of thermal fields in period of 38 years (Jan. 1979-Aug. 2016) showed that Ninh Thuan - Binh Thuan waters were subjected to the significant impact of the ENSO phases (warming and cooling) as well as other processes relate...

Marine optics of seawater includes apparent optical properties (AOP) and inherent optical properties (IOP). Based on survey data in the period of 2013-2014, the paper showed features and spatial and temporal variations of marine optical properties of seawater as well as the impacts of some environmental parameters on these variables. The average of...

This paper presents the results of the initial calculation of ability to spread heat from the cooling water of nuclear power plants in Ninh Thuan coastal waters. Model MIKE 21 is used to calculate the thermal transmission with the assumed volume of cooling water for the units of 2 nuclear power plants I and II. Based on various data sources (domest...

During 2010, the sea water level in East Vietnam Sea has been raised with an extremely high amplitude as many foreign authors recorded recently that was derived from the analysis of multi temporal (1993 - 2010) satellite altimeter data series. This is one of anomalous changes of nature that was strongly relative to climate change. In another aspect...

Based on numerical simulations, we calculate the integral water circulation of the South China Sea on the eastern Vietnam shelf in the Vietnam coastal current area. The main objective of simulations was to study the hydrodynamic structures of this current in the winter–summer interseasonal period. The calculations were performed for the period from...

Among marine investigation and study activities, the studies and calculation of dynamic system are very necessary and important, especially in the Gulf of Tonkin (Vietnam), where many economic and social activities are happening and where is affected not only by the fresh water from Red river but also by the western currents in the South China Sea...

At present, development activities are vigorously going on in Bay lagoon (Nha Trang bay). Therefore, investigation into the natural and environmental conditions in this area, including the study and calculations of current regime is very necessary and pressing. However, modeling the current regime in this lagoon is not simple task because of many i...

This paper has focused on the hydro-dynamical characteristics of Binh Cang - Nha Trang waters from 2 models: ECOSMO (finite difference) and FEM (finite element) based on the last observed data of the VAST’s project, code: VAST 07. 04/11-12. The seasonal currents simulated by FEM showed the existence of local eddies in the top of Nha Phu lagoon. Mea...

Based on the collected and investigated data in the period of 2011-2012 and the plan of socio-economic development of the Thuy Trieu - Cam Ranh coastal areas, this paper estimates the water’s environmental carrying capacity to manage them for sustainable development. The results show that, the volume of organic matter (by COD) met the potential car...

It is the general consensus that the South China Sea (SCS) is influenced by the El Niño southern Oscillation (ENSO). Off southern Vietnam, coastal upwelling is one of the major features of the SCS, which is consequently influenced by the ENSO. However, the processes behind this influence are under discussion. It is the general thesis that the inter...

Demonstrated is an influence of synoptic processes on the seasonal dynamics of the Vietnamese Current in the South China Sea varying its direction under the influence of the monsoon. The spring season of 1999 is used as an example of the transition from the winter to summer. In winter, under the influence of the northeastern monsoon, the current is...

Seagrass canopy plays a critical role in the ecological function of coastal zones. They supply nursery and juvenile habitats for fisheries, stabilize sediment and provide direct food for dugongs and green turtles. The objective of this paper is to detect the distribution and temporal variation of the seagrass communities in Thuy Trieu - Cam Ranh la...

Different types of currents (residual-, tidal-, wind- and general currents, etc.) in Phan Thiet bay have been studied using 3D nonlinear finite element method (FEM). The studied results showed the applicability of FEM for simulation of current regime in waters with complex topography and large liquid boundary. To evaluate the applicability of the m...

The thermal structure of sea surface temperature (SST) in South China Sea (SCS) has been known very well by investigated data of both Vietnamese and foreign authors. Although, the application of remote sensing in ocean color images for studying sea surface temperature in SCS has been limited. This paper presents a new method for studying SST struct...