Landscape Pattern of Land Use Dynamic Development and Driving Force in Xi'an
Based on the remote sensing images of two periods (TM in 1995,2013),the temporal and spatial variations of land use/cover and landscape patterns in Xi'an were explored with the spatial analysis tools of ERDAS9.1 and ArcGIS 9.3.The land use transfer matrixes of the districts or counties within Xi'an during 1995-2013 were obtained.The characteristics of landscape patterns were examined by adopting index analysis method,which could be achieved by FRAGSTAT4.1 tools.The results showed that the dominant type of the land use in Xi'an was forest land,accounted for about 50％,which was mainly distributed in mountainous areas.Cultivated land was also an important landscape type.The areas of woodland,urban construction land,garden land increased and presented a rising trend,while the areas of cultivated land,water and unused land decreased significantly,and presented a declining trend.The index of Pt for the whole period was 0.4,indicating that the overall change of land use was closed to the dynamic balance by two-way transition.With the rapid development of social economy,the landscape diversity index decreased from 1.238 to 1.213,landscape evenness index decreased from 0.691 to 0.677,and the dominance index increased from 0.554 to 0.578,the fragmentation index decreased from 0.086 to 0.074,which indicated that landscape heterogeneity reduced in the study area.The driving forces of the transformation of cultivated land to construction land and green land were from economic and demographic factors,which were also the main factors that influenced the transformation of waters and unused land.Policy factor was the root cause of forest land change.
land uselandscape patterntransformation trendlandscape indexdriving forceXi'an city
国家科技期刊平台
NSTL
万方数据
维普
