Authors: Tran Thi Mai, Hoa; Co-Author: 2010 (Ecotourism is said to be a high prospective trend in tourism development. Theoretically, it addresses the triple bottom line of the World’s pressing issues. Nevertheless, the reality does not usually come up to expectations. Very few case studies were proved to be successfully adopted. One of the reasons is the weakness in terms of community approach, particularly in developing countries. In Vietnam, the problem is even more serious due to the fact that residents are rarely aware of their right in tourism planning and their responsibility towards the environment, as well as a shortage of a common information channel among a local government, tourism enterprises and citizens. As a result, the development of the so-called ecotourism destinations, which have wildly boomed, has little to do with benefit-sharing with local people, who are assumed to be the key to sustainable development. By assessing the potential of community-based ecotourism in Van Don, focusing on Bai Tu Long National Park, this paper will suggest some guidelines for the establishment of an ecotourism site at the very early stage to order to avoid distorted development. Efforts are made to emphasize on a more proactive role the inhabitants should play in the tourism industry to improve their own life as well as their native land.)
Authors: Dao Dinh, Bac; Co-Author: 2007 (This paper discusses debris and mud flash flood, which is a widespread phenomenon with different levels of damaging effects and repetition in the mountainous areas of Vietnam. There are some sites where the flash flood with severe debris components has recurred many times and it has always caused heavy loss of human and materials, such as Lay Nua Commune, the Former Muong Lay District, Dien Bien Province. During the 1990s, this kind of severe hazard is recorded to occur every two years in the town of Former Muong Lay District. This leads to the government’s decision to relocate the town to another place. Some characteristics of physiographical conditions such as climate, relief, lithologic and tectonic features, which are considered relevant to debris and mudflows activities, are analyzed, and then come to the conclusions on determinant agents of debris and mud flash flood in this area.)
Authors: Trần Văn, Trản; Co-Author: 2008 (Xây dựng thuật toán dựa trên phương pháp tính đã chọn và thiết kế cấu trúc phần mềm cho mục tiêu mô phỏng số hiện tượng cơ học cần nghiên cứu. Lập trình theo thiết kế ở nội dung trên. Tiến hành mô phỏng số cho một số trường hợp cụ thể, kết quả cho thấy các trường hợp kinh điển hoặc điển hình của bài toán này trong trường hợp hai chiều đã cho kết quả định tính khá tốt và phần nào phù hợp về định lượng
Tạo lập một phần mềm dùng để nghiên cứu sự tương tác của vật rắn trong dòng chảy chất lỏng dưới dạng mô phỏng số)
Authors: Hoang Xuan, Co; Co-Author: 2008 (Ozone (O3) is a secondary pollutant formed in the atmosphere throughout a complex non-linear chemical reaction involving two classes of precursors: the reactive volatile organic compounds (VOCs) and the oxides of nitrogen (NOx) in the presence of sunlight. The rapid urbanization and industrialization in Vietnam have brought about high air pollutant emissions including the O3 precursors. Ground level O3 may already be high in large cities like Hanoi and Ho Chi Minh City. The O3 episode is very important for scene of view of photochemical smog in Hanoi. Ozone episodes are selected on the days which have a high concentration that lasts for at least two days time. During the episode selection, ozone concentrations larger than 46ppb were observed at two stations (the Lang and Lac Long Quan stations) in March. The maximum value of 74ppb was measured at the Lang station at 14:00 on March 3. This episode was observed in a common meteorological condition for this time of the year.)
Authors: Cung Thuong, Chi; Co-Author: 2007 (Available paleomagnetic data of Cretaceous redbed formations from Indochina and South China blocks are compiled and their tectonic significance is reviewed in a common reference frame of the Eurasian coeval paleopoles. The important factors that play a vital role in determining the tectonic significance of a paleomagnetic result have been taken into consideration and discussed. Review of the Cretaceous paleomagnetic data from the South China block further confirms the conclusion of the previous researchers that the present geographic position of the South China block has been relatively stable with respect to Eurasia since Cretaceous time and shows that the paleomagnetically detected motion of a coherent lithospheric block must be based on the representative data obtained from different places across the block; so the local tectonic movements can be distinguished. Cretaceous paleomagnetic data from the Indochina - Shan Thai block reveal complex intra-plate deformations that have been occurred due to the India - Eurasia collision. Paleomagnetically detected motions from the block-margin areas are mainly reflecting the displacement of upper crustal blocks due to folding and faulting processes, thus a rigid lithospheric block rotation and translation cannot be assumed. The paleomagnetic results from the areas located next to the south of the Red River fault suggest that the fault does not demarcate non-rotated and significantly rotated regions. Accordingly, given the difficulty in separating true lithospheric plate motions from those of superficial crustal blocks, we advocate extreme caution in interpreting the paleomagnetic record in regions such as Indochina where block interaction and strong deformation are known to have occurred.)
Authors: Doan Dinh, Lam; Co-Author: 2010 (Ninh Binh province is well known as an area with famous karst landscape that likes inland HaLong Bay. An attractive and charming cave system is developed in Triasic limestones of the Dong Giao formation, created a wonderful sites for tourism. The exciting features of karst landforms in the Ninh Binh province are mogots. It is mogots make Ninh Binh province became inland HaLong Bay. In the study area most wide spread karst forms are: mogots, karst slope and peaks, karst remnant relief, karst relict relief, karst polje, karst dry valley and karst ponor and sinkholes. Because of tropical climate, limestones in the study area undergone a strong chemical weathering process, created many wonderful and diverse landscapes on the surface and cave system underground. Many caves of different size and forms were developed underground of limestone mountains at different altitudes. Caves of Yen Mo-Tam Diep area were investigated and mapped for tourism developing. Many caves have a culture-historical significant such as: Hang Mat, Tam Giao, Tra Tu, Ong Mich, Ma Tien, Chua Hang, Hang Doi and Hang But. A study results is contribution to planning, exploration a tourism potential of Ninh Binh province as well as to kart investigation in the region.)
Authors: Vu Van, Nghi; Co-Author: 2008 (The potential evapotranspiration can be directly calculated by the Penman-Monteith equation, known as the one-step method. The approach requires data on the land cover and related-vegetation parameters based on AVHRR and LDAS information, which are available in recent years. The Nong Son Basin, a sub-catchment of the Vu Gia - Thu Bon Basin in the Central Vietnam, is selected for this study. To this end, NAM model was used; the obtained results show that the NAM model has a potential to reproduce the effects of potential evapotranspiration on hydrological response. This is seemingly manifested in the good agreement between the model simulation of discharge and the observed at the stream gauge.)
Authors: Lê Hoàng, Tú; Co-Author: 2013 (Lũ lụt là một trong những thảm họa thiên nhiên lớn tại Quảng Nam. Hầu hết các khu vực trũng thấp của tỉnh đều là những vùng dễ bị ngập lũ. Trong yêu cầu hạn chế thấp nhất các thiệt hại về người và của cần có một công cụ hỗ trợ ra quyết định một cách toàn diện trong công tác kiểm soát cũng như cảnh báo lũ lụt. Mục tiêu của nghiên cứu là (i) phát triển cấu trúc thứ bậc các yếu tố ảnh hưởng đến lũ thông qua thuật toán Analytic Hierarchy Process (AHP) để cung cấp thông tin cho các phân tích nguy cơ lũ, (ii) thành lập bản đồ phân vùng nguy cơ lũ dựa trên công nghệ thông tin địa lý (Geographic Information System-GIS), (iii) tích hợp hai phương pháp và ứng dụng cho lưu vực sông Vu Gia tại tỉnh Quảng Nam. Sáu yếu tố được xác định có ảnh hưởng đến vùng nguy cơ lũ bao gồm: độ dốc, thổ nhưỡng, sử dụng đất, lượng mưa, mật độ sông trong lưu vực và mật độ dân số.)
