Abstract: The red soil hilly region of Central Hunan Province is one of the most ecologically fragile regions in China.In this paper,a case study was made on the changes of landscape pattern in Changsha City,using the techniques of geographic information system (GIS) and remote sense (RS).The analysis of the Landsat Thematic Mapper (TM) imageries of 1986 and 2000 showed that in the City,forest was the main landscape type,and farmland was also an important component.Because of human activities,particularly urbanization and farming,the diversity and fragmentation degree of the landscape pattern increased gradually,while its stability was strengthened.Markov model was used to simulate the trend of landscape pattern change,and the comparison between simulated and observed values showed that this model could be used to simulate the landscape pattern change of red soil hilly area.The forecasting on the landscape pattern of Changsha City in 2005～2020 indicated that the area for residence would be increased year by year with the enhancement of urbanization.

Key words: Cadmium, Phaeozem, Burozem, Adsorption reaction, Thermodynamics, Chemical kinetics