http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/8993 2026-05-22T14:47:57Z 2026-05-22T14:47:57Z Tran, Hong Thai Tran, Thi Van http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9466 2011-05-29T10:58:08Z 2011-01-01T00:00:00Z

Assessment of climate change impacts on salinity intrusion in Hong-Thai Binh and Dong Nai river basins Tran, Hong Thai; Tran, Thi Van Climate change (CC) is a global problem that not only affects the developed countries but also the developing ones as Vietnam. With a coastal line of approximately 3,260 km, Vietnam is expected to be affected considerably by climate change including salinity intrusion. Through the assessment of impacts of climate change on water resource in Hong-Thai Binh and Dong Nai river basins which located in two key economic zones, in the paper a general picture of impacts of climate change on salinity intrusion in Vietnam is presented, where MIKE 11 was used for Hong – Thai Binh basin and HydroGIS for Dong Nai basin. The study gives out some results of salinity intrusion in the two basins according to three climate change scenarios in three typical years: 2030, 2050, and 2100. Finally, both the short and long terms adaptation measures to salinity intrusion caused by climate change in Vietnam are summarized.

2011-01-01T00:00:00Z Luong, Tuan Anh http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9465 2011-05-29T10:54:48Z 2011-01-01T00:00:00Z

Application of hydro-mathematical models for flood forecast and inundation warning of Tra Khuc-Ve River basins Luong, Tuan Anh The papers present the results of study on application of rainfall-runoff, channel routing models for improvement and extending forecast lead time and Diffusion Hydrodynamic Model (DHM) for inundation warning of Tra Khuc and Ve river basins.

2011-01-01T00:00:00Z Nguyen, Ba Tien Tran, Van Quy http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9464 2011-05-29T10:51:05Z 2011-01-01T00:00:00Z

Study of the Treatment of the Liquid Radioactive Waste Nong Son Uranium Ore Processing Nguyen, Ba Tien; Tran, Van Quy Liquid waste from Nong Son uranium ore processing is treated with concentrated acid, agglomerated, leached, run through ion exchange and then treated with H2O2 to precipitate yellowcake. The liquid radioactive waste has a pH of 1.86 and a high content of radioactive elements, such as: [U] = 143.898 ppm and [Th] = 7.967 ppm. In addition, this waste contains many polluted chemical elements with high content, such as arsenic, mercury, aluminum, iron, zinc, magnesium, manganese and nickel. The application of the triditional method as one stage precipitation or precipitation in coordination with BaCl2 is not effective. These methods generated a large amount of sludge with poor settling characteristics. The volume of final treated waste was large. This paper introduces the investigation of the treatment of this liquid radioactive waste by the method of two stage of precipitation in association with polyaluminicloride (PAC) and polymer. The impact of factors: pH, neutralizing agents, quantity of PAC and polymer to effect precipitation and improve the settling characteristics during processing was studied. The results showed that the processing of liquid radioactive waste treatment through two stages: first stage at pH = 3 and the second stage at pH = 8.5 with limited PAC and polymer (A 101) resulted in significant reduced volume of the treated waste. The discharged liquid satisfied the requirement of the National Technical Regulation on Industrial Waste Water (QCVN 24:2009).

2011-01-01T00:00:00Z Tran, Thuc http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/9463 2011-05-29T10:47:23Z 2011-01-01T00:00:00Z

Climate change adaptation from small and medium scale hydropower plants: A case study for Lao Cai province Tran, Thuc This paper presents an analysis of the benefits of climate change adaptation from small and medium scale hydropower plants in Lao Cai Province. Lao Cai is a mountainous province with high hydropower potential. Totally 116 small and medium hydropower projects in different stages of development have been identified with installed capacities ranging from 0.9 MW to 60 MW. Based on the results of statistic downscaling, four climate change scenarios were developed for the Lao Cai province area. Impacts of small and medium scale hydropower plants, both negative and positive impacts, on water resources, rural development, social economic and environment of the Province are assessed. The study also considers the benefits of small and medium scale hydropower plants on CDM revenues.

2011-01-01T00:00:00Z