Spatial Pattern Evolution Analysis Of Park Green Space In Zhengzhou City Center Based On GIS

With the continuous development of domestic urbanization,people are no longer satisfied with the current living standards,and residents pay more attention to the pursuit of higher environmental quality.Park green space can not only provide people with functions such as rest,fitness,communication and sightseeing,but also an important carrier of urban greening and beautification and ecological environment.It plays a very important role in promoting urban construction.Taking the park green space in the main urban area of Zhengzhou as the research object,through the analysis and field investigation of the park information recorded in the green space system planning of Zhengzhou in recent years,this paper establishes the Zhengzhou park green space vector database based on Arc GIS and FRAGSTATS,and studies the evolution characteristics of the park green space in the main urban area of Zhengzhou from 2005 to 2020,Based on the geographical weighted regression model,this paper explores the influencing factors of park green space area in the main urban area of Zhengzhou.The main research results show that:(1)The area and distribution of park green space in the main urban area of Zhengzhou are uneven,the degree of fragmentation of park green space patches is high,and the diversity index and richness index of different types of park green space patches are different.There is little difference in the number of green spaces in the four types of parks,the number of parks is relatively small,and the number of special parks is the largest.(2)The area and quantity of park green space in the main urban area of Zhengzhou increased slowly from 2005 to 2010,but showed a rapid growth trend from 2010 to 2015;In 2005,the distribution pattern was discrete distribution,in 2010,the distribution pattern was random distribution,and after 2015,the park distribution pattern was cluster distribution.Moreover,the construction of park green space in Zhengzhou has gradually changed from concentrated in the Fourth Ring Road to peripheral construction,and the number of parks in the periphery of the city has increased significantly.The distribution center of gravity of the park also spreads outward from a single center of gravity.(3)There is a negative correlation between socio-economic factors and park area.The more developed the population economy is,the smaller the park area is.There is a positive and negative correlation between natural factors and park area.In the positive correlation area,the park area in high terrain is larger;In the negative correlation area,the park area in low-lying areas is larger.According to the data analysis results,this paper summarizes and analyzes the problems existing in the development and construction of park green space pattern in the main urban area of Zhengzhou,and puts forward reasonable suggestions for better planning and layout of urban green space system in the future.Finally,combined with the relevant research results at home and abroad,this paper makes a brief evaluation and Prospect of the full text.It is hoped that it can provide a scientific theoretical reference for the research on the spatial pattern of park green space in Zhengzhou and other large cities.