Tạp chí Khoa học Đại học Huế: Khoa học Trái đất và Môi trường

This paper aims to present the climate change trend in Vietnam, a typical case study in Danang City. With the use of statistical analysis, which is non-parametric Mann-Kendall test, the research conducted the test of climate change trend based on the study of recent precipitation and temperature trends. The results were evaluated based on the statistical analysis at the 0.05 level by ProUCL 4.1 software. The research showed clear signs of climate change related to precipitation and temperature factors. In general, precipitation change in Danang had the upward trend in the observed time series (p <0.05). However, there existed increasing trend of the precipitation in January, March, August and a decreasing trend in June during the observed period. According to the scenario in 2100, the average precipitation in Danang will increase by about 1.04% in comparison with the period 1980 – 1999. Regarding temperature factor, based on the results of the Mann-Kendall test, June’s average temperature in Danang will increase about 0.3150C in every ten years. Therefore, urgent solutions are required to reduce the increase and adapt to climate change.

The Khanh Hoa open coal field in Thai Nguyen province is one of the largest in Vietnam. In recent years, there has happened subsurface coal fire in this area due to many reasons, including outdated mining techniques and unauthorized mining, etc. Subsurface coal fire is a dangerous phenomenon which seriously affects the environment by releasing toxic fumes, reigniting forest fires and causing subsidence of surface infrastructure. This article presents our study of the application of LANDSAT multi – temporal thermal infrared images in detecting coal fire. The results obtained in this study can be used to monitor fire zones so as to give warnings and propose solutions to prevent coal fire.