ANALYSIS OF LAND USE CHANGES IN RELATION TO ENVIRONMENTAL VARIABLES IN COASTAL CITY IN JIANGSU PROVINCE FROM 1980 TO 2010:A CASE STUDY IN DONGTAI CITY
The Coastal Development Plan in Jiangsu Province had risen to national strategy in 2009.The significant ground work of coastal city in Jiangsu Province in the future is to acquaint the trajectories and driving forces of land use change in the past.In the present work,we utilized 5 periods of RS remote sensing images and GIS technology to analyze the land use structure and trajectories between 1980 and 2010.We identified the correlations between different environmental attributes and land use changes by canonical correspondence analysis.The results show that the major land use types were arable land (2029.02km2),construction land(155.31km2),grass land (60.41km2) and water land (56.56km2) in Dongtai city from 1980 to 2010.The variable quantity of land use accounted for 16.98％ of the total area,and the arable land,grass land and construction land accounted most.The main land use change trajectory is arable land shift to construction land,followed by grass land shift to arable land.From the point of spatial distribution,the transfer from arable land to construction land mostly located in city and surrounding areas,the transfer from grass land to arable land mainly in the coastal zone areas.The two hot spot regions of land use changes in Dongtai city were city and coastal zone,which are relatively independent and lack of connections.CCA ordination reveals that the environmental attributes like distances to city,to town,to transportation and the shape of patches all had affected the transfer of land use significantly.However,the coastline as the major character of coastal city,with the development of tideland reclamation also had effect on changing the distribution of land use.Consequently,locations of infrastructure like the city and town,the transportation the shape of patches should be consider seriously.By means of change,the land use types in coastal zone can we promote social and economic transformation,further protect the coastal ecological environment,enhance comprehensive benefits of coastal development and lead land use to the sustainable development path.
land use/cover changecoastal cityCCAenvironmental attributesDongtai City
NETL
NSTL
万方数据
维普
