Analysis of Land Use Dynamic Changes in Huanglong Mountainous Forest Areas Based on GIS and RS

Based on TM images in the years of 1990,2000 and 2008,the land use dynamic changes from 1990 to 2008 in Huanglong Mountainous forest areas were analyzed by using RS and GIS methods.The Markov process was applied to analyze and predict the variation tendency of the land use.The results showed that before 2000,land use changed rapidly and the land-use dynamic degree was 1.60% with a scattered transfer.The land use dynamics reduced to 0.94% and the transfer direction tended to concentrated from 2000.During 18 years,forest area increased the most,up to 427.06 km2,but open forest land and unused land significantly reduced.Areas of cultivated land increased,and then decreased.The major change way was that other land use types changed into forest;Markov prediction reveals that the farmland,open forest land,unused land will be further reduced,forest and other wooded area will continue to increase,and the range would diminish.Urban and rural land and water,will also fluctuate insignificantly in the nest 16 years from 2008.