Đặc điểm địa chất công trình nền đê sông Hồng khu vực Hà Nội và các tai biến địa chất liên quanSeries of problems of infiltration and seepage deformation, as well as slope failure of river band and dike of Red River in Hanoi has made the administators and people to be fearful. In history, dike breaks have occurred in many places, influencing on the social-economic situation of the region. The major cause of the above geological hazards is ...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 707 | Lượt tải: 0
Mô hình chu trình chuyển hoá nitơ trong hệ sinh thái biển áp dụng cho vùng biển vịnh Bắc BộThis paper presents the model on Nitrogen transformation cycle in the marine ecosystem has been established and used to study on primary productivity in Gulf of Tonkin. In the cycle, the Nitrogen element is transformated through 5 compounds: Phytoplankton, Zooplankton, Dissolved Organic Matter, Amonium and Nitrate. The transformation processes ...
22 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 597 | Lượt tải: 0
Thực vật nổi (phytoplankton) vùng biển phía tây vịnh Bắc Bộ và Phụ CậnBased on phytoplankton data collected in Tonkin Gulf and adjacent from 1959 to 2009, phytoplankton is studied. The total of phytoplankton species has been identified to be 449 species, 100 genuses, 43 families, 10 orders, 4 classes, 4 phylums and be divided into three ecological groups. The biological indexes (diversity index - H’, Evenness inde...
17 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 743 | Lượt tải: 0
Một số thí nghiệm về dòng chảy river plumeThis paper presents an overview of buoyant gravity currents and RPs, and some experimental results and analyses of experiments of small scale RPs in laboratory with a flume model. In the experiments, the flume is filled with salt water to model sea water and to create the ambient of the RP; fresh water is released at one side of the flume to cre...
20 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 600 | Lượt tải: 0
Individual variation of toxicity in three Vietnamese toxic marine puffer speciesThe results of survey on the toxins in three species marine puffers responsible for many poisonings in Vietnam revealed that they possess both TTX and STX, in which TTX is as dominant toxin of all poisoning cases. The toxicity in these species is different depending on individual and tissue. This finding shows that toxin component and toxicity ...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 561 | Lượt tải: 0
Thành phần loài và phân bố của rong biển quần đảo Lý Sơn, Quảng NgãiLy Son is an archipelago with two islands - Ly Son and An Binh which are belonging to Quang Ngai province in Central Vietnam. Until now, there have been few studies on seaweeds at Ly Son. This article presents results of two field surveys, conducted in November, 2009 and May, 2010 under the research project “Surveying and assessing status of ec...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 603 | Lượt tải: 0
Some meteo - Hydro - dynamical features in mekong river mouth areaFrom study results it can be stated that: 1. Distributions of wind and wave characteristics are corresponding to seasonal variation. Predominant wind and wave directions are NE during NE Monsoon period and W, SW during SW Monsoon period. During transition period the wind and wave are varying. The wind velocity and wave height during NE Monsoon ...
14 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 450 | Lượt tải: 0
Về những cấu trúc thủy động lực đặc thù gây xói lở - Bồi tụ tại dải ven bờ nam Trung BộSpecific hydro-dynamical structures include the clockwise ellipsoid eddies covering the whole open bays of central coastal zone and the narrow zones of diffraction-wave ray orthogonals constructed after changing over large promontaries and harbour breakwaters. First of them is main reason created important mouth accretion points in the bays of ...
16 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 647 | Lượt tải: 0
Ứng dụng viễn thám và GIS trong theo dõi và tính toán biến động đường bờ khu vực Phan ThiếtBy integrating remote sensing with GIS, the monitoring and calculation of shoreline changes are carried out quickly and effectively. With multi-temporal Landsat imageries, preliminary view is outlined about shoreline change in Phan Thiet from 1973 to 2004. In addition, by the extension of ArcView, DSAS, shoreline change rates are calculated in ...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 637 | Lượt tải: 0
Cơ sở khoa học cho lượng giá kinh tế các tổn thất tài nguyên môi trường do sự cố ô nhiễm dầu tác ðộng lên các hệ sinh thái biển Việt NamThis article is part of the contents of National research project "Study of basically sciences and low to compensate for oil pollution on Vietnam Sea" to provide the scientific basis for evaluating economic losses of environmental resources due to oil pollution incidents affecting the marine ecosystems in line with Vietnam's conditions. In the v...
12 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 609 | Lượt tải: 0
