Dynamic analysis of land use landscape patterns in Qianjiang City
[Purpose]Investigating the dynamic changes in the landscape pattern of land use is of great significance for the rational allocation and utilization of land resources in Qianjiang City.This article provides crucial references for the regional sustainable development of Qianjiang City.[Method]This study was based on land use data from three periods in 2016,2018,and 2020 of Qianjiang City.Software tools such as ArcGIS and Fragstats were utilized to analyze the dynamics of land use and landscape patterns from 2016 to 2020 through methods like land transition matrix,land use dynamic degree,and landscape index analysis.[Result](1)In terms of land use structure,the predominant land uses in Qianjiang City were paddy fields,rice-crayfish fields,and dry land.There was a continuous decrease in the area of dry land,while the areas of rice-crayfish fields,forest,and construction land increased.The overall change in land use was mainly characterized by the transformation of water bodies and paddy fields into rice-crayfish fields,as well as the mutual conversion between paddy fields and dry land.From 2016 to 2020,the absolute values of the rates of change in land use type areas from highest to lowest were:rice-crayfish fields>forest>water>dry land>paddy fields>construction land.(2)The dynamic degree of land use in Qianjiang City continued to decline,with a comprehensive dynamic degree of land use of 5.59%.(3)In terms of landscape pattern changes,the class-level analysis showed that the fragmentation of paddy fields and dry land increased,while the fragmentation of rice-crayfish fields decreased,and the aggregation level of paddy fields continually declined.The landscape-level analysis indicated that the complexity of the landscape pattern in Qianjiang City increased,with decreased aggregation,reduced connectivity,intensified fragmentation,an increase in the number of small and medium patches,and enhanced heterogeneity.[Conclusion]From 2016 to 2020,there are significant changes in the overall land use of Qianjiang City,with intense mutual transformations between land classes.The land use landscape types tend towards balance and diversification,but the overall landscape fragmentation is intensified.The findings are significant for future optimization of land use structure and rational utilization of land resources,and providing references for subsequent territorial spatial planning and sustainable development in Qianjiang City.
NETL
NSTL
万方数据
