http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/8987 2026-05-17T16:11:50Z 2026-05-17T16:11:50Z Tran, Van Quy Tran, Van Son http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9426 2011-05-29T07:13:43Z 2010-01-01T00:00:00Z

Title: A study of waste water impacts of main factories on water quality of To Lich river, Ha Noi Authors: Tran, Van Quy; Tran, Van Son Abstract: Waste water from industrial sites amounts to one third of total waste water discharged into To Lich river, and may have serious effects on the river water quality. With the total amount waste water of factories (Hanoi beer alcohol and beverage joint stock corporation (HABECO), Trang An JSC and Thuong Dinh industrial park) of 45,000 m3/day, these factories accounts for more than a half of total industrial waste water released into To Lich river. The analytic results of water samples taken from To Lich river show that the parameters of DO, COD, BOD5, TSS, NH4 +, NO2 - and coliform exceed the Vietnamese Standards (QCVN 08:2008, column B2). However, the concentrations of Fe and heavy metals (Zn, Cd, Cr, Cu, Mn), are lower than the Vietnamese Standards (QCVN 08:2008, column B2), except the concentration of ion Pb, especially in the area from Thuong Dinh Industrial Park to the last segment of the river. The analytic results of waste water from the main factories (HABECO, Trang An JSC and Thuong Dinh industrial park, Hanoi Soap Joint Stock Company (HASO); Saovang Joint-stock Rubber Company (SRC); Tool No.1 Joint-stock Company (TJC)) show that, the parameters of TSS, BOD5, COD, total of nitrogen, total of phosphorus are higher than the Vietnamese standards for Industrial waste water QCVN 24:2009/BTNMT (column B). In particular, all waste water parameters of Trang An JSC are lower than the Vietnamese Standard for Industrial waste water QCVN 24:2009/BTNMT (column B), because the factory has an effective waste water treatment system. The heavy metals parameters of waste water from all factories are lower than QCVN 24:2009/BTNMT. Estimated loads of contaminants in waste water from the factories by load coefficient of IPC software show that without treatment, HABECO can release 1974 tons of BOD, 766 tons of TSS, 8.4 tons of phosphorus and 52.5 tons of nitrogen annually; Trang An JSC can release 64.8 tons of BOD, 48.6 tons of TSS, 0.6 ton of phosphorus, 1.6 tons of nitrogen and 25 tons of oil and grease; HASO releases 30 tons of BOD, 33 tons of TSS and 5 tons of oil and grease. Thus, if the waste water is not treated, it can lead to a very seriously pollution for To Lich river.

2010-01-01T00:00:00Z Nguyen, Huu Ngu Tran, Anh Tuan http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9425 2011-05-29T07:09:53Z 2010-01-01T00:00:00Z

Title: Community based coastal resources management behind changes in surface water environment and land policy: A case study in the Tam Giang Lagoon, Central Vietnam Authors: Nguyen, Huu Ngu; Tran, Anh Tuan Abstract: This paper attempts to examine the changes in surface water environment and community based coastal resources management activities in the Tam Giang Lagoon, Central Vietnam. The results show that the lagoon’s surface water has been polluted. BOD５, COD and nutrient concentration have increased in the lagoon’s surface water environment. It proved that there was a present of organic substances. Due to the globalization of seafood products and changes in lagoon’s water quality by aquaculture development; the local government has issued many regulations to manage lagoon’s resources. Among those policies, the establishment of fisheries association and/or self-management team is considered as appropriate solution to develop aquaculture and capture aquatic resources in the lagoon. However, the benefit and power of the resource users have not been stipulated for both fisheries association and self-management team. Instead of this, it is only member’s responsibilities and duties in using lagoon’s water surface areas. As a result, most of resource users in the study area have not participated in these organizations as their members. The resource user must do all activities in relation to aquaculture by themselves, without supporting from above organizations.

2010-01-01T00:00:00Z Doan, Dinh Lam http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9424 2011-05-29T07:05:17Z 2010-01-01T00:00:00Z

Title: Morpho- structure characteristics of some karst caves in Yen Mo- Tam Diep area, Ninh Binh province Authors: Doan, Dinh Lam Abstract: 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.

2010-01-01T00:00:00Z Tran, Thi Mai Hoa http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9418 2011-05-29T06:55:03Z 2010-01-01T00:00:00Z

Title: Potential of Developing Community-based Ecotourism in Van Don District, Quang Ninh Province Authors: Tran, Thi Mai Hoa Abstract: 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.

2010-01-01T00:00:00Z