Study on spatial and temporal changes of land use and landscape pattern evolution in Zhaotong city
Using the land use data set from 2000 to 2020 as the data source,GIS technology was used to explore the characteristics of land use change in Zhaotong city from three aspects:land use transfer matrix,standard deviation ellipse and center of gravity transfer model,and landscape pattern index was used to analyze the landscape pattern evolution from the landscape level and landscape type level.The results show that:(1)The main land types in Zhaotong are forest land,cultivated land and grassland,the growth rate of construction land is the largest,the standard deviation ellipse of grassland is the least obvious,and the distribution of center of gravity of cultivated land,forest land and grassland is relatively stable.(2)From the landscape level,the number of patches increased,the degree of connectivity decreased,the largest patch distribution dominance weakened,the degree of fragmentation increased,the connectivity decreased,the cohesion decreased and the complexity increased.(3)From the landscape type level,the landscape type with the largest patch number,patch density and edge density is cultivated land,the landscape type with the largest patch index and aggregation index is woodland,the landscape type with the largest mean patch fractal dimension is construction land,and the landscape type with the largest interspersion&juxtaposition index is water.
land usespace-time changelandscape patternevolution characteristicstransfer matrixstandard deviation ellipsecenter of gravity transfer model
国家科技期刊平台
NSTL
万方数据
