Remote Sensing for Monitoring Surface Water Quality in the Vietnamese Mekong Delta: The Application for Estimating Chemical Oxygen Demand in River Reaches in Binh Dai, Ben TreLandsat 8 provided the potential of optical remote sensing data source for estimating a large spatial distribution of the COD concentration, which was almost impossible via a traditional field-based approach. However, there was a limitation in monitoring the temporal distribution of the COD concentration due to local weather conditions of the ...
14 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 745 | Lượt tải: 0
The relation between fault movement potential and seismic activity of major faults in Northwestern VietnamIn Northwestern Vietnam, the movement potential of major fault zones such as Son La, Ma River, Lai Chau - Dien Bien, Da River faults is assessed to be closely related to the seismic activities. The calculated results of FMP at 60 survey points along major faults in Northwestern Vietnam show that the fault movement potential is mainly from me...
16 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 720 | Lượt tải: 0
Abnormal features of oceanographic characteristics in upwelling Vietnam waters under impact of El Niño eventsThis article is a part of research results of the institutional basic research project-2017 funded by Institute of Oceanographythe Vietnam Academy of Science and Technology (IO-VAST). Thanks to Professor Joji Ishizaka, Dr Eko Siswanto and other members of APN project with code CAF2015-RR11-NMY-Siswanto for discussions and exchanging on scient...
15 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 804 | Lượt tải: 0
Assessment of heavy metal pollution in abandoned Giap Lai pyrite mine (Phu Tho Province)Although Giap Lai pyrite mine has been closed down for many years the ARD still occurs and negatively impacts on quality of water and soil in the mining area. Surface water in the mining area usually has relatively low pH (<5.5) and does not meet the Standard for irrigation water (QCVN08-MT:2015/BTNMT). The levels of Fe and Mn in surface wa...
15 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 767 | Lượt tải: 0
Surface sediment grain-Size distribution and sediment transport in the subaqueous Mekong Delta, VietnamThe variation of sediment grain-size parameters from eight transects in the subaqueous Mekong Delta showed that a decreasing trend of sediment grain size was observed from seaward across the clinoform topset and foreset. Coarser sediments were abruptly dominant on the adjacent shelf, due to the less influence of modern sediments from the Mekon...
17 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 939 | Lượt tải: 0
Calculation of the turbidity transport in dinh an coastal zoneThe software RDPOL based on random walk method is used for calculation of turbidity transport in Dinh An-Tranh De coastal zone. Turbidity has been calculated and compared with the observati-on--data at HJ--stations. The resu-ltsindicate that: - In general, the computed results are in acceptable agreement with the ob- -., served data. - In Octo...
12 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 759 | Lượt tải: 0
Numerical simulation of fluid mud layer under current and waves in estuaries and coastal areasThe formation and development of fluid mud layer in estuaries and coastal areas are numerically simulated and successfully applied to the Severn estuary as an illustration example. Using the finite difference method, numerical solutions for the mathematical models are obtained, in which ADI method with staggered grid for the derivative in respe...
11 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 832 | Lượt tải: 0
Numerical. simulation of fluid mud layer in estuaries and coastal areasA numerical simulation for the formation and moving of fluid mud in estuaries and coa.stal area.s is implemented and applied to the Severn estuary a.s an illustration example. The finite difference method is used, in which ADI method with staggered grid for the derivative in respect to space and Leap-frog scheme for time is used for tidal flow m...
10 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 628 | Lượt tải: 0
3-D numerical simulation of the tidal circulation in the gulf of Tonkin, Vietnam- A numerical simulation for the tidal circulation in the Gulf of Tonkin has been performed. The model was calibrated and verified by 6 observed stations when setting the horizontal diffusivity constant and tuning the Chezy coefficient. The results show a quite good agreement between the computed results and the observations in both of the cali...
13 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 685 | Lượt tải: 0
A numerical model for the tidal oscillation and current in the gulf of tonkinThe numerical model based on TIDEFLOW-2D for the tidal levels and currents for the Gulf of Tonkin was established and tested carefully. The testing results show a good agreement and this model can be used for simulation the tidal movement in the Gulf. Results of such like simulation will be published later. The paper was accomplished partly tha...
9 trang | Chia sẻ: honghp95 | Ngày: 30/11/2020 | Lượt xem: 713 | Lượt tải: 0
