| With the gradual acceleration of the urbanization process of Nanchang and the growth of the economic level,the urban park green space,which is a vital component of the urban green space landscape,has undergone major changes,and the landscape pattern has also changed significantly.This change will definitely affect the society.The development of the economic system and the ecological environment have a certain impact.Therefore,the changes in the regional pattern and landscape must be grasped in time,and to a certain extent,the forecast of future development trends must be realized.This is important for the planning and construction of parks and green spaces in Nanchang City and the realization of the economy.The simultaneous development of environmental ecology is of great significance.This paper selects the typical area of rapid urbanization—the urban area of Nanchang City as the research object.The four phases of Landsat TM and ETM remote sensing impact of Nanchang City in 2005,2010,2015 and 2020 are the most basic database,combined with GIS and ecological Learn theories and related calculation methods,interpret remote sensing impact information,and obtain regional four-phase landscape type distribution maps.Calculate the value of the landscape index through the acquisition of data,and then obtain the landscape matrix that reflects the spatial change.On this basis,the driving factors that have caused the 15-year pattern of changes in the region can be obtained.(1)In 15 years,the landscape pattern of the study area has changed significantly.From the perspective of landscape composition and changes,the number of green patches of various types is gradually increasing,and the value of sub-dimensions is gradually decreasing,which also shows that green patches of parks are gradually being merged and the value of landscape fragmentation is reduced.Boundaries become regular and ecological diversity is reduced.The decrease of the minimum distance index of the landscape indicates that the green patches of each park are gradually distributed in clusters;(2)According to the landscape type transfer matrix,as the city develops,other land is the part with the largest transfer volume among the landscape types,and the main transfer type is construction land.(3)Urban parks and green areas are showing an overall growth trend,mainly from other green areas,construction land and cultivated land.In short,the main characteristics of the changes in landscape types in the study area during the 15 years are the decrease of cultivated land,other land,and other green land,and the increase of construction land,water area and park green land;During the evolution of the landscape pattern,this article focuses on the analysis of the driving effect caused by human factors,and the following conclusions are drawn through the research: population growth,economic development and urbanization process and related policies have jointly affected the changes in the landscape pattern of the study area;(4)Finally,this paper adopts the CA-Markov model to predict the evolution of the future landscape pattern in the region,and makes necessary analysis of the predicted results,with the purpose of revealing the main trend of change in the region.The conclusions are as follows: In the next 10 years,the distribution of parks and green spaces will gradually be uniform,the diversity of green spaces will increase,and the richness of landscapes will increase.It is necessary to build more natural-simulating urban parks to increase urban ecological diversity. |
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