Methodology of regional environmental impact assessment based on landscape spatio-temporal analysis for rapid urbanization
快速城市化对区域生态环境影响的时空过程及评价

Assessment of regional environmental conditions was improved integrating remote sensing classification,evaluation of land use change,landscape pattern analysis and geostatistics.This paper presents a case study analyzing spatial and temporal factors driving bay-area land use change for the rapid urbanization in Lianyungang City,a seaport in Jiangsu Province.By using Landsat TM/ETM images of the study area acquired in three different years(2000,2004 and 2006),we evaluated total area and annual rate of land use change from rural to urban.The land use change information derived from the remote sensing images was also used to analyze spatio-temporal changes of urban areas,salt field wetlands,shallow seas and farmland between 2000 and 2006.The results show that our improved method is effective in evaluating the evolution of landscape patterns and the ecological effect of rapid urbanization.Through analysis with geostatistics,we were able to quantitatively describe the intensity of changes in the regional environmental conditions.The study concludes that changes of regional environmental conditions were closely associated with rapid urban expansion driven by urban planning and development strategy.