About
36
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Introduction
Interests:
- Urbanization relates to ground subsidence and tide flooding,
- Urban water supply sources, ground water recharge,
Techniques:
- Radar and optical satellite image for urban research;
- Stable and radioactive isotope tracer.
- Drone solutions
Projects:
- Ground subsidence in the wealthy region urbanization in Ho Chi Minh City
- Isotope and dioxin tracer in the Mangrove forest
- Water resources
Current institution
Additional affiliations
January 2005 - November 2019
October 2008 - September 2011
May 2002 - present
Education
October 2008 - September 2011
September 2002 - April 2005
September 1997 - April 2002
Publications
Publications (36)
![Validation results for rRMSE [%] between model discharge and ADCP...](publication/382098292/figure/tbl1/AS:11431281259564478@1720536193133/Validation-results-for-rRMSE-between-model-discharge-and-ADCP-campaigns-The-ADCP_Q320.jpg)
![Validation results for rRMSE [%] between model water level and water...](publication/382098292/figure/tbl2/AS:11431281259489868@1720536193258/Validation-results-for-rRMSE-between-model-water-level-and-water-level-measurements_Q320.jpg)
In this study, we address the challenges posed by data scarcity in hydrodynamic modeling within one of the most vulnerable coastal zones in the world—the Saigon-Dongnai tidal river system in South Vietnam. We investigate calibration strategies for a 1D hydrodynamic model using minimal in-situ data obtained from an existing local monitoring program,...
The Surface Water and Ocean Topography (SWOT) mission aims to provide essential data on river width, height and slope in order to estimate worldwide river discharge accurately. This mission offers a powerful tool for monitoring river discharge in dynamic coastal areas, like the Saigon-Dongnai estuary in Southern Vietnam. However, estimating dischar...
Microplastics (MPs) and their risk to living things and human health have been attained a lot of attention worldwide. Reports on the MPs in mollusks used as seafood are being increased in all continents. However, the information is limited in Vietnam. This study aimed to identify the quantitative presence of MPs in three bivalves ( Anadara granosa,...
We investigate the most severe rainfall event ever experienced in Ho Chi Minh City (HCMC), Vietnam. It occurred on 25 November 2018 when Typhoon (TY) Usagi directly hit HCMC. During this event, there was more than 300 mm of rainfall over 24 h which led to flooding and considerable material damage. We propose an in-depth study of TY-induced, compoun...
Understanding recharge in the Mekong Delta is critical for the delta's groundwater resources, and requires the investigation of recharge processes at the local scale. In this study of the north eastern area of the Mekong Delta, time-series of environmental tracer data (δ¹⁸O, δ²H, major ions and ³H) and markers of rural pollution (NH4 and NO3) were...
Recently, unmanned aerial vehicles (UAV) have been applied to various fields: mapping, aerial surveying, mine monitoring, construction monitoring, etc. UAVs have many advantages, such as high flexibility, low cost, and time savings, for each survey. This article studies a monitoring construction site project using photogrammetry images collected wi...
Currently, the Fairy Stream is a breathtaking tourist destination for domestic and foreign tourists due to the natural unspoiled beauty of the area. However, this landscape is vulnerable to human impacts such as littering, carving words on sand walls, climbing on sand walls causing slips and falls. Therefore, the requirements for management and mon...
Application of methods using natural and artificial radionuclides such as 210Pb, 137Cs and 241Am in sediments to estimate chronology and accumulation rates of sediments, has been extensively developing for the recent past decades. In general, their results had have been worldwide agreed in many certain areas, but other areas have not yet. Can Gio m...
Can Gio mangrove forest (CGM) is a low-lying area in the estuary of the Dong Nai - Sai Gon river basin, where pollutants from megacities have been consecutively discharged into. The mangrove forest was also a military base zone destroyed by sprayings of defoliants. Seventeen samples were selected in separated depths of two sediment cores in the CGM...
Currently, there have been no publications of using unmanned aerial vehicles (drones) in mine management and supervision in Vietnam. Meanwhile, drones have been used in many fields worldwide, especially in exploitation management. Therefore, the purpose of this paper is to present the feasibility of applying unmanned aerial vehicles to the manageme...
Sedimentological and geochemical data were obtained for bed sediments from a tropical estuary environment in Vietnam in October 2014, January 2016, and November 2016. The data include grain-size distribution, percentage of clay, silt and sand, percentage of organic matter, concentration of total particulate phosphorus (TPP), concentration of partic...
Với mục tiêu sử dụng viễn thám Drone kết hợp với học máy có giám sát mã nguồn mở và GIS để đánh giá hiệu quả trồng cây phục hồi cải tạo môi trường mỏ tại mỏ titan X-tỉnh Bình Thuận, bài báo tập trình bày kết quả xây dựng một mô hình thử nghiệm nhận dạng cây trồng từ ảnh độ phân giải cao. Trong mô hình thử nghiệm này, nhóm tác giả đã kết hợp thuật t...
1 Tóm tắt-Tại Việt Nam, chưa có những công bố sử dụng thiết bị bay không người lái trong giám sát quản lý mỏ, trong khi đó những ứng dụng này được sử dụng nhiều trên thế giới và trong các lĩnh vực khác. Mục tiêu của bài báo này nhằm giới thiệu tính khả thi của thiết bị bay không người lái trong quản lý mỏ. Thông qua quá trình bay chụp thực tế và sử...
Can Gio mangrove forest (CGM) is located downstream of Ho Chi Minh City (HCMC), situated between an estuarine system of Dong Nai - Sai Gon river and a part of Vam Co river. The CGM is the largest restored mangrove forest in Vietnam and the UNESCO’s Mangrove Biosphere Reserve. The CGM has been gradually facing to numeric challenges of global climate...
Can Gio mangrove forest (CGM) is located downstream of Ho Chi Minh City (HCMC), situated between an estuarine system of Dong Nai - Sai Gon river and a part of Vam Co river. The CGM is the largest restored mangrove forest in Vietnam and the UNESCO’s Mangrove Biosphere Reserve. The CGM has been gradually facing to numeric challenges of global climate...
A wide range of persistent organic chemicals, including polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), some insecticides, as well as polybrominated diphenyl ethers (PBDEs) and some perfluoroalkyl substances (PFASs) were analyzed in 17 bed sediments collected along the Saigon River and at adjacent canal mouths from upstre...
Synthetic Aperture Radar (SAR) images have widely utilized in environmental monitoring as well as geological hazards (subsidence, landslide,... ), however, this is still a quite new technology in Vietnam. Therefore, the main purpose of this study is to introduce the DlnSAR technique and effects to SAR images analysis processing.
Nam Sai Gon has bee...
Sai Gon South is the gateway area being focused on developing urban infrastructure of Ho Chi Minh city. However this area have a low-lying terrain and weak geological structure. Therefore the subsidence problems are very serious now due to the urbanization. There is few research obtained to the effects of subsidence in this area the study has been...
Titanium mining is developed by the open pit method in Viet Nam. At first, vegetable cover is removed and then ores is pumped in mixing with water. Heavy metals are separated from sand ore by the spiral concentrator, quartz sand is disposal backward for refill the land. To monitor the ore production, satellite images can be used to compare changes...
Coastal tidal flats, where is a favorable environment for some marine species residence, reproduction and development. Based on the surveys, sample analysis in the Go Cong Dong tidal flat shows that sediment qualitity is changed by seasons. Intertidal sediment is loamy-sand, with 74.36% sand, 9.57% silt and 16.09% clay; pH is alkalinity; total orga...
The importance of REE for modern industries is proved by the high demand. The abundance of REE is richer that that of noble matals like gold or silver. However, supply sources are concentrated in China. The share of product of REE was highest in 2009 (over 90%) and that is used as a national strategy. Mining industry in Vietnam mainly developed in...
In the study area, the Pleistocene aquifer has small depth. From 2009, pH was discovered with high depletion and suddent increase of aluminum in groundwater. However, in 2013, the aluminum concentratin seems to be stable. The analyzed results of mineral composition, soil, sludge, groundwater, and waste water samples showed that sources of aluminum...
In the study area, the Pleistocene aquifer has small depth. From 2009, pH was discovered with high depletion and suddent increase of aluminum in groundwater. However, in 2013, the aluminum concentratin seems to be stable. The analyzed results of mineral composition, soil, sludge, groundwater, and waste water samples showed that sources of aluminum...
Bien Lac Lake is located in the transition zone from Di Linh-Bao Loc high land to Dong Nam Bo area belongs to the administrative of Tanh Linh and Duc Linh District, Binh Thuan Province. The thickness of sediment in the lake, according to one borehole, is 13.0 m. The results of analyzing 92 pollen samples show that there are four periods of palaeocl...
Binh Duong province is located in the north-northeast of Ho Chi Minh City, which have the highest industrial zones in Viet Nam. Recently, underground water in many places is found to contain excess of aluminum for human use. The province authorities have focused to research on this issue but the reasons has not been elucidated. This paper presents...
This paper has focused on Land-use change to clarify spatial distribution of human impacts on terrain as a viewpoint of vulnerability mapping to natural disasters. First, the technique of making 100m-mesh land-use maps, which divides into farm lands, forest, urban, river, sea shore and sea, has been developed using the old editions' 1/50,000 topolo...
Human disturbances on the ground surface cause erosion and deposition in difference types of landscape. Research on erosion and deposition will understand the magnitude of these impacts in the past and now. In this paper, sediment volume stored in channel for long-term (Holocene) is calculated anderosion model (RULSE) is applied to estimate erosion...
Onga River basin located in Northern Kyushu Island, Japan, is one of the
sites where many archeological evidences of human settlement were discovered. In this
research, we clarify spatiotemporal distribution of deposition in Quaternary and Holocene
periods based on the borehole data using GIS in order to estimate the human impacts
for geomorphology...
According to Mining Regulation, quarry reclamation after mining has to be proposed in EIA. In reality, due to many reasons, a lot of quarries being extracted or closed quarries have not had detailed reclamation plan yet. This lead to waste land resource and cause many environmental problems. In order to enhance mining effect and mitigate negative i...
ON THE INVESTIGATION OF BUILDING STATUS AND POTENTIAL
RISKS ASSOCIATED WITH GEOHAZARDS IN DISTRICT 1 AND 3,
HOCHIMINH CITY
Nguyen Viet Ky (1), Nguyen Hong Phuong (2),Nguyen Hong Bang (3), Tran Tuan Tu (1)
(1) University of Technology, VNU-HCM
(2) Institute of Marine Geophysic and Geology
(3) Division of Hydrogeology and Engineering Geology for the...
This article show all results of building survey, geotechnical,
hydrogeological condition in District 1 and 3. it is predicted that many natural and artificial
hazards may occur in the study area such as: Earthquake, subsidence due to underwater
pumping, underground constructions...also effect to contrucstion
Tri An – Tanh Linh area is divided into 11 units of morphostructure at level 4 which based on
interpreting radar, optical accompany with analysing data in GIS. They are also determined by
morphosculptures which extracted from layers in GIS data. The results help us apply widely GIS
technology and remote sensing in mineral geology and environment...
The Tien River’s mouth in Ben Tre province has a diverse and characteristic ecosystem in Mekong River Delta coastal zone. Two third of the Meking River’s material have been loaded into the sea that built up the wide deposit ranges. In addition, the amplitude of floods is more and more increasing that eroded the river bank upstream and deposit rapid...
Questions
Questions (2)
I just konw that TCDD has half life 8,7 yearr with 95% confidence follow serum analysis (Michalek JE et al.,1996). But how does it decay in soil.
When I analyze the Al content in groundwater, I found that there is a relation between Al-pH. When pH low Al3+ is solube very high, then increasing pH Al3+ decrease, but it increases again when pH is above 6. From lab test, I found a hyperbol relation between Al3+ and pH (2,8-6). I don't care type of pH yet. Do you know some published references relate to this topic?
