Abstract:

By taking the remote sensing images of Zhushan County in Hubei Province in 1999,2005,2011 and 2017 as data sources and using ArcGIS,ENVI and Fragstats software,the change information of land use landscape pattern in the study area was extracted,and the driving factors were analyzed quantitatively by principal component analysis.The results show that:(1)During the 18 years,the land use types in the study area were mainly forest land,arable land and water area,and the comprehensive index of land use degree shows a downward trend.(2)Land transfer is mainly characterized by the transfer of cultivated land and bare land,and by the transfer of woodland,construction land and waters,and the general trend and state index of land use decreased first and then increased.(3)On the landscape structure,woodland has always been the dominant landscape type in the study area,and the proportion order of each landscape type has not changed,and the total number of patches shows a downward trend.(4)On landscape heterogeneity,Shannon diversity index and evenness index showed a downward trend,while the spreading index showed an upward trend,indicating that the dominant landscape types of forest land in the study area increased the overall landscape pattern control,and the spatial connectivity of various landscape types enhanced.(5)Social economy and agricultural production are the main driving forces of land use landscape pattern changes in the study area.

Key words: land use, landscape pattern, temporal and spatial variation, driving force, Zhushan County