SPATIAL-TEMPORAL DYNAMICS OF LAND USE AND LAND COVER CHANGE IN THE COASTAL ZONE OF JIANGSU PROVINCE

Coastal zone is a crisscross zone of land and ocean ecosystem,of which the ecological environment is vulnerable and with significant economy and ecology value.Land use and land cover change is one of the most important components and major causes to regional environmental changes which are caused by the exploitation of coastal zone.The paper took four TM remote sensing images of coastal zone of Jiangsu in 1980,2000,2005,and 2008 as data,and analyzed the spatial-temporal dynamics of coastal zone in Jiangsu,by land use structure,land use diversity and land use degree.The results revealed that there were obvious spatial differences and grading diversifications in land-ocean direction.The main land use type in coastal zone is ecological land which is greatly different with the developed area.Among 13 counties in coastal zone,land use degree has a feature of high-low-high in north-south direction.From 1980 to 2008,the spatial differences on land use structure and land use diversity are stable,but the feature of land use degree gradually disappears.Among five buffers in land-ocean direction of coastal zone,land use diversity and land use degree respectively have feature of low-high-low and high-middle-low in land-ocean direction.From 1980 to 2008,the area with high-value of land use diversity moves to the middle of coastal zone.The coefficient of variation among five buffers becomes lager.The grading diversifications are different in the north and south area of coastal zone,which is divided by the Sheyang estuary.