Landscape Dynamics And Driving Force Analysis Of Wenyu River Basin

With the population growth and social and economic development,the great change of watershed ecological environment and its internal driving force is a key research field of landscape ecology.The ultimate purpose of the research on watershed landscape dynamics and driving force is to grasp the law of landscape environment evolution,improve the prediction ability of landscape dynamic change trend,and protect,reasonably develop and utilize and sustainably watershed landscape ecology Development provides scientific basis.This paper selects Wenyu River,the first tributary of Fenhe River,as the research object of the basin.The main content of the study is landscape dynamics and driving force of Wenyu River Basin.This paper starts from five aspects:landscape cover,landscape pattern,landscape prediction,landscape evaluation and landscape driving.The main tools used are: GIS,ENVI,FRAGSTATS,IDRISI,LINKAGE,ORIGIN,SPSS.Landscape cover mainly studies the structure,transfer and speed characteristics of landscape cover.Landscape pattern is mainly analyzed by landscape index.The landscape of the basin from 2020 to 2040 is simulated and predicted.The livability,safety and health of the watershed were evaluated.The driving factors and mechanism of landscape cover and landscape pattern were analyzed.The main results are as follows:(1)①there are significant,rapid and complex changes in the structure,speed and pattern of the overall landscape in Wenyu River Basin from 2000 to 2018.②From2000 to 2040,the area of cultivated land will continue to decrease,the area of construction land and water area will continue to increase,the area of other land will gradually decrease after 2018,the area of forest land will slightly increase in the later period of fluctuation decrease from 2000 to 2018,the area of grassland will show fluctuation decrease from 2000 to 2018,and may continue to decrease after2018.③The cultivated land and forest land are decreasing speed changes.Water area,construction land and other land use are growth rate changes.The overall landscape change speed of the basin slowed down.④The situation of land transfer in the basin is complex.The construction land and water area are net income,and other landscape types are net expenditure.⑤It is predicted that by 2040,there will be no significant change in the overall regularity of the watershed,the degree of watershed fragmentation will continue to increase,the landscape connectivity will decline,the landscape diversity and evenness will continue to increase,and the core area of the landscape will tend to be stable.⑥The landscape index of city—forest region shows regular gradient change,and the core area and edge area of each type are important gradient nodes.(2)①natural factors,location construction factors and social economic factors have significant driving effect on landscape cover.Natural factors have a fundamental and long-term impact on the change of landscape cover.In short time scale,location construction factor and social economic factor are the main driving forces of landscape cover change.②Natural and social factors have significant driving effects on the landscape pattern change of the watershed.In a short time scale,human activities are the most active factors affecting landscape change.Social factors are the main driving force for the evolution of regional landscape pattern.Economic and population development,industrial structure change and industrialization process are important landscape driving forces.(3)①the livable,safe and healthy pattern of Wenyu River Basin presents their own structural dynamics.There are complex two-way changes in the transfer situation.The overall livability,safety and health of the basin are developing in a better direction.②There are significant spatial autocorrelation among habitability,safety and health.③Livability and population distribution,safety and health are positively correlated with GDP,population distribution and ecological services.③The driving effect of each driving factor on livability and health is different.Livability is driven by land use,topography,economy,population,location,climate and ecology.Health is driven by landscape security pattern,landscape flexibility,landscape interference,productivity,landscape organization structure and ecosystem services.④Different sources and corridors have different ecological importance.The landscape security pattern of Wenyu River Basin was optimized with the ecological framework of "three areas,three axes and many points".⑤The health gradient from urban area to forest area shows regular changes.There are complex dynamic changes in the overall landscape of the basin from2000 to 2018 and to 2040.According to the analysis,the ecological surplus of the Wenyu River Basin is not much,while the economic and social development of the Wenyu River Basin is still at a high speed.The ecological pressure of Wenyu River Basin is obvious.Through the study of landscape dynamics and driving force of Wenyu River Basin,we hope to provide scientific basis for the overall landscape planning and optimization of the basin.It is hoped that the area can increase the monitoring,research and analysis of the overall ecology of Wenyu River,make rational use of landscape resources,protect important landscape nodes,strengthen the overall landscape connection,and reasonably allocate social energy flow and logistics.In order to achieve sustainable and healthy development of the basin.