An Analysis on the Landscape Pattern Dynamic Changes and Driving Force In Huihe Basin

摘要

An application of GIS and the landscape pattern analysis software FRAGSTAS were used for research the changes of landscape structure nearly 14 years of Huihe basin in the hulunbuir prairie. The results show that, (1) from 1995 to 2010, cultivated land, grassland, basin forest area decreased, other land use type area were increased, and sand was the most obvious. From the grass internal structure change, low coverage in the grass and grassland area coverage in the proportion of total area decrease by 0.4% and 7.2% respectively in 14 years, and the high coverage grassland area ratio increases by 3.3%. Internal composition structure of forest land, the most significant change was shrubbery area, the area is reduced by 2.57%, the proportion of forestland of increased by 2.05%, and the proportion of open woodland area does not change significantly. (2) the land use type conversion frequently in basin area, large area and large proportion of the land use type conversion mainly in farmland, forest land, meadow and the sand. In the province, the main cultivated land into high, medium, and in the forest coverage grass, shrub and grass high coverage into cultivated land;;Wetland overall increased;;Sand of forest area into grass and open woodland, medium and low coverage grass coverage into the sand in the grass province, landscape pattern driving force analysis shows that the climate warming and human activities on the trend and rational use of natural resources, which lead the Huihe basin in the service function of ecological to degradation.