Analysis Of Land Cover Change And Spatial Pattern In Yichun City Based On RS And GIS

As an important component of global change,land use/cover change is also one of the main causes of global change.Since the industrial revolution,mankind has experienced tremendous socio-economic development,manifested as changes in surface land use/cover.The land use/cover change at the regional level reflects the socio-economic development of the region.At present,China is in a period of comprehensive construction of a well-off society,but also a period of rapid development of urbanization.In this context,the study of urban land use/cover change has important theoretical and practical value.Based on the comprehensive analysis of the progress of land use/cover change research at home and abroad,this paper selects Yichun City,1989,1999 and 2010,chooses the research area of Yichun City,Heilongjiang Province as the research area.Landsat TM remote sensing images were used as data sources,and the land use/land cover maps of Yichun City were obtained by human-computer interaction.The data of other terrain data and socio-economic statistics were used to study the data of Yichun City Land cover dynamic change,and combined with GIS tools and spatial measurement technology for spatial pattern analysis.Research indicates:1.The land use/cover type of Yichun City is obvious.The forest land occupies 85%-90%of the total area of land use/cover type in Yichun City,occupying the absolute advantage,followed by unused land,cultivated land,grassland,construction land and The proportion of water,which accounts for the total area of land use/cover type,decreases in turn.2.The land use/coverage type in Yichun City from 1989 to 2010 has changed greatly.Forest land,cultivated land and grassland area showed an increasing trend,and the area of water and unused land showed a decreasing trend.The land use/cover types were mainly transferred to forest land and cultivated land,and the transfer area was 4759.15 hm2 and 2281.69 hm2 respectively.The cultivated land was mainly transferred to forest land and unused land.The transfer area was 46268.31 hm2 and 2194.26 hm2.The construction land is mainly transferred to forest land and cultivated land,with the transfer area of 593.42 hm2 and 573.64 hm2 respectively.The forest land is mainly transferred to cultivated land,construction land and unused land.The transfer area is very small relative to the total area of forest land And the transfer area was 206.05 hm2 and 58.95 hm2,respectively.The unused land was mainly transferred to forest land and cultivated land,and the transfer area was 48023.12 hm2 and 2818.96 hm2,respectively.