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SUMMARY The terrain effect in vertical deflection in the northwest and highlands mountainous areas This article presents the methods determining terrain effect in vertical deflection and the surveying result in the mountainous areas of the Northwest and Gia Lai-Kon Tum highlands. Based on the analysis and assessment of the calculations, the ter...
5 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 475 | Lượt tải: 0
SUMMARY Refinement anomalous elevation EGM2008 base on GPS-levelling data in local region Tay Nguyen and south central coastal areas The paper introduces the process of refinement anomalous elevation EGM2008 base on GPS - Leveling data and Collocation method. Results show that the EGM08C improving Geoid ensure for determining leveling height by...
7 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 411 | Lượt tải: 0
SUMMARY Magnetovariational method and result of testing models Many scientific projects relevant to five elements of electromagnetic field show that Magnetotelluric (MT) method can be applied in researching inhomogeneity of 2D and 3D models. Therefore, simultaneous analysis of these magnetotelluric elements recorded in distant station such as (...
9 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 433 | Lượt tải: 0
SUMMARY The H/V ratio method and its abilities in estimation of the site effects on strong ground motions in Hanoi The paper presents a fundamental theory of the H/V ratio technique (or Nakamura’s method) and several obtained results in Hanoi by using this method. This is one of the most inexpensive and convenient technique to reliably estimate ...
6 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 583 | Lượt tải: 0
SUMMARY Preliminary observation of particulate organic carbon (POC) contents in water environment of the downstream of Red River system POC (particulate organic carbon) is one of major forms of organic carbon in water. It plays an important role in assessment of river water quality. The observed results in period from April 2009 to April 2010 a...
5 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 693 | Lượt tải: 0
SUMMARY System analysis of water resources and proposal of sustainable water resources allocation for Ba River Catchment In this paper, a system analysis methodology is tested in conjunction with the application of the Water Evaluation And Planning (WEAP) package to analyze the effectiveness of water resources allocation and sharing in the Ba R...
11 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 478 | Lượt tải: 0
SUMMARY Salinization in the Co Chien river and solutions for river fresh water exploitation to supply for Tra Vinh city Domestic water supply in the coastal Mekong Delta provinces in general and in Tra Vinh in particular is very stressful. At present, water source for domestic water supply is mainly from groundwater. However, groundwater is now ...
7 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 463 | Lượt tải: 0
SUMMARY Role of topo-geographical conditions of Northern Central Region Vietnam and the difference of heavy rains between North and South Ngang Pass Following the article “Causes and the occurring rule of heavy rain unusual heavy rain” in North Central of Vietnam [Journal of Sciences of the Earth T.31, N°3/2009], this paper will present the res...
9 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 583 | Lượt tải: 0
SUMMARY Effective application of reverse circulation structure against bank erosion of Vu Gia river at Dai Cuong commune, Quang Nam province Vietnam has an abundant river system with big residential areas and important economic - cultural constructions along the banks. However, dynamical processes are causing erosion of river bank, especially a...
6 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 414 | Lượt tải: 0
SUMMARY River bank erosion assessment in the confluence of Thao, Da, and Lo rivers River bank erosions in the confluence of Thao - Da - Lo rivers have been occurred and continuously develop. Our studies show that endogenous factors including right-slip movement of Red River Fault are underlying reason of the risks of river bank erosion and exog...
7 trang | Chia sẻ: thanhle95 | Ngày: 05/07/2021 | Lượt xem: 448 | Lượt tải: 0