Tổng hợp tài liệu Địa Lý tham khảo cho học sinh, sinh viên.
Locating in the middle of the Gulf of Tonkin, Bach Long Vy island possesses a great potential for economic - social development and natural conservation. However, its resources and environment are strongly impacted by adverse natural factors included climate change, and human activities. Using the matrix analysis, the available vulnerability fo...
14 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 552 | Lượt tải: 0
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 t...
14 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 688 | Lượt tải: 0
The paper mentioned the influence of topography of the free surface to seismic ground motions, an important topic in the field of enginerring seismology, but often overlooked in seismic hazard assessments in Vietnam. The paper also introduced a method for estimating these effects in Vietnam context that the distribution of the seismic stations is...
6 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 546 | Lượt tải: 0
In this paper, the authors introduce one type of nanomineral, imogolite, which is, currently, in the interest of many scientists. Based on characteristics of chemical compositions and natural forming conditions, imogolite is synthesized by combining a solution of AlCl3 with Si(OC2H5)4. Different experimental conditions, such as concentrations of ...
6 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 615 | Lượt tải: 0
Impact of winter monsoon circulations on aerosol optical depth (AOD) in Bac Giang and Bac Lieu stations are analyzed through the wind speed data series of the National Center for Environmental Prediction/Department of Energy (NCEP/DOE-2) and the AOD data obtained from AERONET stations network (AErosol RObotic NETwork) of the National Aeronautic ...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 505 | Lượt tải: 0
The 1D P-wave velocity model and station corrections were computed by Simultaneous Inversion/Coupled Hypocenter-Velocity Model Algorithm (Kissling E. at all, 1994) and the data set of 135 local earthquakes (located with a minimum of 5 observations and an azimuthal gap ≤ 180°) for the northern part of North West Region of Vietnam. Based a b250 o...
8 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 573 | Lượt tải: 0
Mountainous region of Quang Ngai province in active tectonic activity; subcidence-cracking hazard takes place with increasing scale which is difficult to control, costing the lives of local residents. The establishment of active faults and the warning of subcidence-cracking hazard development planning for sustainable socio-economic development of...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 675 | Lượt tải: 0
The aim of this paper is using Geographic Information System (GIS) and remote sensing data to evaluate the landslide susceptibility and zoning in the Son La hydroelectricity area by the Saaty's Analytical Hiearchy Process (AHP). Landslide locations were identified from interpretation of remote sensing data and field surveys. The topographic, geo...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 551 | Lượt tải: 0
The paper presents complex geophysical techniques as well as Ground Penetrating Radar (GPR), Very Low Frequency electromagnetic method (VLF), resistivity methods for investigating near-surface geological structure of river banks to localize interfaces and weakness zones which are related to the source of Tien and Saigon rivers banks avulsion-pro...
12 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 586 | Lượt tải: 0
t Cenozoic granitic YeYenSun complex is distributed mainly in the northwest PhanSiPan uplift region, comprising Sa Pa-Binh Lu, Tung Qua Lin-Si Lo Lau, Nam Xe-Sin Suoi Ho, and Chung Leng Ho-Po Ho sections. The complex is composed of biotite granite, biotite-amphibole granite of small to medium grained size, light colored and porphyre dacite, sho...
12 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 545 | Lượt tải: 0
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