| The survival of humans to increasingly push forward urbanization space structure has been changed.As an important part of the city,green space provides many benefits for human daily life.The rapid development of urbanization inevitably leads to the sharp reduction of green space and brings a series of ecological and environmental problems,There is a certain contradiction between this and the sustainable development of ecological environment,so the research on the spatiotemporal evolution and driving force of urban green space landscape pattern has become one of the hot issues.Since Yichun became the first ecological pilot city in China,the landscape pattern of green space has changed significantly in recent years.This paper takes Yichun as the research object,and selects three time nodes of 2005,2010 and 2018 as the research scale to explore the dynamic changes of landscape pattern in the region from 2005 to 2018.This paper mainly uses the combination of Arc GIS and RS technology to extract and interpret the green space landscape information of Yichun satellite remote sensing image,so as to obtain the landscape classification map of Yichun City in three different periods.Through the calculation of land use dynamic degree and landscape transfer matrix model,the overall characteristics of the spatial-temporal evolution of green space and the dynamic transformation of green space are analyzed In the construction of driving force system,human factors are taken as the main object,principal component analysis and grey correlation analysis are used to quantify the index data,and qualitative analysis is combined to explore the social economy,topography and politics Different factors,such as policy and system,affect the spatial and temporal evolution of urban green space landscape pattern.Research shows:(1)The expansion of the green space in the form of cultivated land as the main,the contribution degree of urban green space construction for cultivated land > forest land > water area.In the stage of the entire study than in the growth of green space continued high,the area of the three landscape types were downward trend in the different degree,because of cultivated land is closely related to human life.It is usually close to urban land,rural residential land and other construction land,and construction land generally presents the change form of extension expansion.Therefore,under the rapid promotion of urbanization and industrialization,construction land such as roads and houses in cities mainly occupies cultivated land,which gradually reduces its area.(2)By analyzing the landscape pattern of Yichun City based on the 12 landscape indexes selected in this paper,it can be found that the number and density of landscape patches of forest land and cultivated land in green space increased from 2005 to 2010,and the landscape was gradually broken;During the period of 2010-2018,urbanization intensified.Due to the construction of urban infrastructure such as roads and pipe networks,patches in the landscape were gradually divided into small patches,the number of patches kept increasing,and the degree of fragmentation intensified.In green space,cultivated land landscape patch is more complex,deeply affected by human activities,and the shape of patch tends to be regular.During the whole research stage,the landscape spatial morphology develops towards diversity,and the uniform distribution of patches helps residents to enjoy the social and ecological benefits brought by green space fairly.However,due to the influence of human activities,the dominant landscape with connectivity gradually decreases,and landscape heterogeneity increases.(3)The driving force system composed of the level of agricultural development,the quality of life of residents,the degree of urban construction,social economy,population size and other aspects jointly affect the dynamic evolution of the landscape pattern of green space in Yichun City.With the passage of time,the impact of comprehensive driving factors on the temporal and spatial evolution of the landscape pattern is more and more obvious.The overall landscape pattern of green space and the dynamic change of each landscape type are mainly affected by population size,agricultural development and urban construction,especially the cultivated land landscape,and the correlation degree between the three is more than 0.75,in which the correlation degree between the total grain yield,grain planting area and urbanization rate and cultivated land is more than 0.85,which directly affects the cultivated land landscape Compared with other types of water landscape,economic development and residents’ life have a deeper impact on the water landscape,social economy is constantly strengthening,part of the funds are invested in the construction of ecological culture,the quality of life of residents is steadily improving,and also affects the water landscape to a certain extent The spatial and temporal evolution of the pattern.On the other hand,natural factors to a large extent limit the green space landscape type of spatial layout and change form,in a short time scale,the impact is very weak,and urban planning,land use policy and other qualitative factors have a direct and rapid impact on the overall green space landscape layout.Based on the study of the spatiotemporal evolution process and driving factors of green spatial landscape pattern in Yichun City from 2005 to 2018,this paper puts forward corresponding countermeasures and suggestions in view of the deficiencies in the process of urbanization and the ecological environment and other problems,hoping to provide samples for the future development planning of Yichun City. |
PDF Full Text Request