| Urban parks are an important part of the urban green space system.Urban parks will directly affect the recreational activities of residents in the city in terms of their spatial structure,scale,area,and quantity.With the continuous advancement of Nanchang’s urbanization,the development of Nanchang’s urban context is closely related to the development of park green space in the downtown area of Nanchang,and its landscape pattern has undergone tremendous changes.Through the actual construction of the park green space change research,combined the urban contextual factors sort out the evolution mechanism,and try to provide ideas on the optimization method of the park green space landscape pattern in the central urban area of Nanchang.Based on the summary and summary of a large number of relevant literature studies,the thesis combs the related concepts and connotations of urban parks and green spaces and landscape patterns,and takes landscape ecology,human geography and urban planning theories as the theoretical basis of the research.The research takes Nanchang’s downtown area as the research object,selects five important nodes in 1999,2004,2009,2014 and 2019 from 1999 to 2019,and conducts vectorization processing on the spatial layout of its parks and green spaces for the purpose of studying Nanchang’s downtown area.The evolution of the landscape pattern of urban parks and green spaces calculated the park green area and related landscape pattern indexes;the partial least square regression method was used to quantitatively and qualitatively analyze the impact of the urban context on the landscape pattern of the park and green space in terms of nature,social economy,urban construction,policies and urban planning the degree of influence and direction of the evolution,sort out the evolution mechanism of the park green space landscape pattern;finally,through the evolution analysis conclusion,provide countermeasures and suggestions for the current situation and evolution of the park green space in the central city of Nanchang,and give reference value for the improvement of urban park green space planning.Studies have shown that from 1999 to 2019,the coverage of parks in the central urban area of Nanchang has gradually increased,and the green patches have become more complex and fragmented,and the diversity has become more and more obvious.The extra-large and large patches are uneven in spatial layout,showing the distribution of "less center and more periphery".The total area of the comprehensive park is the largest,the degree of fragmentation is low,and the degree of aggregation is relatively high.The green patches are relatively severely disturbed by humans.The distribution is concentrated in the "Ganjiang East Area",and the "Ganjiang West Area" has very little distribution;the total area of community parks is the smallest,the number of green land patches is relatively simple,and the distribution is extremely uneven,showing a "scattered spot";the number and area of specialized parks are relatively large,with obvious advantages,and their fragmentation is low,showing a "marginalized" distribution;the number of parks has increased sharply,the degree of fragmentation has gradually increased,and there is a lack of connectivity.The green patches are greatly affected by man-made interference,and their shapes are complex,showing a "decentralized" layout.Among the natural factors of urban context,elevation and slope have obvious effects on the evolution of park green space landscape patterns.The main influencing factors in socioeconomic and urban construction factors include permanent population,per capita GDP,and the output value of primary and secondary industries.The proportion of the economy,the fixed asset investment of the whole society,and the urban green coverage rate.At the same time,the overall urban planning and green space system planning play a direct role in the development and change of the landscape pattern of parks and green spaces. |
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