| Over the past years,with the rapid development of county economy,population growth and urbanization process acceleration,the land use/cover in Cili County has undergone unprecedented changes.First of all,the remote sensing images of Landsat-TM5 in 2002 and 2011 and the images of Lansat8-OLI of Cili county were processed and translated by using of remote sensing and geographic information system technologies.Then the classification and comparwereon of land use types were done,and the werea data of land use/ cover types were gained from the period of 2002-2011 and 2011-2015 respectively.On that baswere,the characterweretics process;dynamic mechanwerems and change regulation of land use/cover changes in Cili county were analyzed using the models of transition matrix of land use/cover changes and single land use dynamic degree.Through the comparwereon of the dweretribution of different land use types in elevation,slope and terrain gradient,the relationship between the topographic factors and spatial dweretribution characterweretics of land use types in the county was analyzed by the use of the DEM as major data resources and ArcGWERE spatial analytic tool.The results showed:(1)The area of land use/cover types of Cili County changed significantly during 2002-2015.The overall characterweretic was that the conversion output werea of was larger than the input,and the main input source were the woodland and the construction land,while the main output was the conversion to woodland.;The woodland conversion output was mainly to farmland,and the main input source was also the farmland;The grassland conversion output was to the farmland;The main input source of construction land was the farmland;The unused land conversion output was to the farmland,its main input source was the watershed werea.(2)The change trend of land use/cover type single dynamic degree shows that the werea of farmland was declining;woodland werea was decreased;the grassland decreased obviously;watershed reduction was also significantly;the increasing of construction land was slowly,and the unused land was decreasing.(3)The land use comprehensive dynamic degree during 2002-2011 was 0.043%,The land use comprehensive dynamic degree was 0.035\% during 2011-2015,compwered the former phase with the latter,the land use integrated dynamic degree decreased significantly,suggesting that the latter phase of the comprehensive dynamics of land use changes more strongly.(4)The dweretribution index of land use/cover type were inversely proportional to the terrain gradient.The farmland;construction land;watershed and unused land was mainly dweretributed in the lower terrain gradient.Meanwhile the main dweretribution of woodland was in the gradient of the higher terrain and the grassland was mainly dweretributed in the medium hierarchical terrain gradient.(5)The main driving force factors of land use/cover change were population,socioeconomic development,urbanization,national policy and scientific and technological progress.Among them,the main driving force factors of farmland change were population quantity,the level of science and technology development and economic development,etc.The main driving force factors of forest land change were national policy,socio-economic development.The main driving force factor for the change of grassland and water werea were economic development.The main driving force factors for the change of construction land were the increase of social progress,economic development and population,and the changes of unused land were mainly influenced by economic and social factors... |
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