Analysis Of Land Use Change And Landscape Pattern Gradient In Linchuan District

Land is the basis for the survival and development of mankind,with the socio-economic and population rapid growth,human development and utilization of land more and more in-depth.The evolution of land use landscape pattern reflects the mankind's way of changing land use.This paper takes Linchuan district of Fuzhou City of Jiangxi Province as the research area,based on its early 2006,end of 2010 and 2015 land-use change vector data,DEM data and other natural and socio-economic data.Use ArcGIS10.2,Fragstats4.2,ENVI5.1,Excel2010 and other software.Use the dynamic model of land use,Kriging interpolation,hot spot analysis,transition matrix,digital elevation model,digital slope model and so on to analysis of land use change and spatial differentiation in Linchuan district.Determine the best granularity of landscape pattern analysis in Linchuan district from 2006 to 2015,quantitatively describe the characteristics of landscape pattern change of land use in Linchuan district from 2006 to 2015.Analysis of Linchuan district from 2006 to 2015 in different gradient zone landscape pattern changes and performance.Based on the analysis of landscape pattern of Linchuan district,put forward feasible countermeasures.The main research conclusion in this paper as follows:(1)From 2006 to 2015,the landscape types of land use in Linchuan district are mainly forestland,cultivated land rural residential land and the urban and township land,the proportion of the total area of those landscape types of land in Linchuan district in 2015 was 39.09%,34.79%,5.77% and 4.07%.During the study period,the landscape area of cultivated land,garden land,forestland,other agricultural land and nature reserve and mining land decreased to varying degrees,while the urban and township land,rural residential land,land for traffic and water facilities,and other construction land landscapes were in a trend of increasing area.(2)Compared with the early study period,the rate of change of land use landscape in the later study period has obviously accelerated.And the urban and township land,mining land land for traffic and water facilities,and other construction land have the largest landscape dynamic.Chengxi,Zhongling,Zhanping and Shangdundu are the hot spots in the dynamic changes of land use.(3)During the study period,the urban and township land and rural residential land are the types of land use landscape with the largest increase in area.The added part of the two roughly coincides with the reduced part of cultivated land and forest land landscape.Natural reserved area mainly transferred to the cultivated land,this reflects the replenishment of cultivated land mainly depends on the development of natural reserve during the study period.(4)The elevation classes of 2,3 land accounted the proportion of the total area in Linchuan district was 32.24% and 43.60%.The slope grade 1,2,3 land accounted the proportion of the total area in Linchuan district was 23.95%,47.55% and 22.27%.Cultivated land is mainly located in elevation classes 1,2,and 3 and in slope grade 1 and 2.Forestland is mainly located in elevation classes 3,4 and 5 and slope grade 4 and 5.In elevation and slope grade 4,5,the forestland is the most important type of land use.(5)Study and determine the best granularity of landscape pattern analysis in Linchuan district is 40m*40m.During the study period,the degree of fragmentation of the all land use types increased.As the main land use landscape types in Linchuan district,cultivated land and forestland landscape have the complicated shapes,the urban and township land,land for traffic and water facilities and other construction land landscapes,the dispersion degree is continuously reduced and landscape is more and more centralized.During the study period,the landscape fragmentation greatly accelerated,the area of landscape patch increased.Landscapes become more and more irregular.The landscape is more and more affected by human activities,with its diversity and evenness increasing.The landscape tends to be rich and complex,the heterogeneity increases,and the landscape moves towards equilibrium.(6)The first gradient zone of land use landscape in Linchuan district is gradient zone 1 to 3,this zone is 0 to 7.5km away from the city center.The urban and township land,dominates.The internal structure gradually stabilizes,the fragmentation level is low,and the degree of fragmentation is also gradually reduced.The second gradient zone is gradient zone 5 to 10,this zone is 7.5 to 25 km from the city center.The main landscape is cultivated land.The shape of the landscape tends to be complicated.The degree of landscape fragmentation is greatly increased during the study period.The landscape heterogeneity is the strongest,with more diverse features The third gradient zone is gradient zone 11-21,which is more than 25 km from the city center.With the forestland as the dominant land use type,away from the city center,the landscape shape tends to be simplified,the human interference factor is the lowest,the landscape tends to aggregation,but the degree of diversity is decreasing.