| The structure of urban construction land is a manifestation of the spatial distribution pattern of urban employment,housing,service,and transportation functions,and it is also the proportional relationship between the types of construction land in terms of quantity.With the development of social economy,the structure of urban construction land is constantly being adjusted.A reasonable urban construction land structure helps to improve the functions of the city,improve the overall efficiency of construction land utilization,improve the city’s production,living and ecological levels,and promote the construction of a new modern city.This thesis took 12 prefecture-level cities and 17 county-level cities in Heilongjiang Province as the research objects.Based on urban construction land and socio-economic panel data from2006 to 2018,information entropy model,Lorenz curve-Gini coefficient,shift-share analysis method and multivariate regression model were used to study the temporal and spatial characteristics and influencing factors of urban construction land structure changes in prefecture-level cities and county-level cities in Heilongjiang Province.In this way,we can grasp the utilization status of urban construction land in Heilongjiang Province,analyze various problems existing in the utilization of urban construction land,and seek a fundamental way for the optimization of urban construction land structure and the scientific formulation of urban planning in the future.The main results and conclusions of this thesis are as follows:(1)The area of urban construction land in prefecture-level cities and county-level cities in Heilongjiang Province both increased slightly.The urban construction land in Harbin and Daqing has expanded significantly,while the urban construction land in Jixi and Hegang,and the two county-level cities Mishan and Tieli have shrunk.The area of all types of construction land in prefecture-level cities is increasing.Except for the decrease in the area of warehouse land,the area of all other types of construction land is increasing in county-level cities.Residential land in county-level cities accounts for an excessively high proportion of urban construction land.(2)The information entropy of urban construction land structure in prefecture-level cities and the information entropy of urban construction land structure in county-level cities both rise in fluctuation,and the balance of the urban construction land structure system is enhanced.Compared with prefecture-level cities,the urban construction land structure system of county-level cities is more orderly and the structure is more unstable.From the perspective of the degree of stability of changes in the urban construction land structure of prefecture-level cities,the urban construction land structure of Heihe,Harbin,Yichun,Mudanjiang,Daqing,Suihua,Jixi and Jiamusi is relatively stable;the urban construction land structure of Qiqihar and Hegang is relatively unstable;the urban construction land structure of Qitaihe and Shuangyashan is unstable.From the perspective of the degree of stability of changes in the urban construction land structure of county-level cities,the urban construction land structure of Ning ’ an,Nehe,Hulin,Anda,and Hailun is relatively stable;the urban construction land structure of Wuchang,Suifenhe,Zhaodong,Bei’an,Fujin,Mishan,Muling,and Tieli is relatively unstable;the urban construction land structure of Wudalianchi,Shangzhi,Hailin,and Tongjiang is unstable.During the study period,the information entropy of urban construction land structure in most prefecture-level cities and county-level cities increased.In 2018,the prefecture-level cities with lower information entropy were Jixi and Qitaihe,and the county-level cities were Wuchang,Tieli,Zhaodong,and Anda.(3)During the study period,whether prefecture-level cities or county-level cities,the spatial distribution of municipal utility land is relatively concentrated.Except for residential land,the spatial distribution of other construction land types in prefecture-level cities tends to be balanced.The spatial distribution of public facility land,road land and green land in county-level cities tends to be balanced,while the spatial distribution of residential land,industrial land,warehouse land and municipal utility land tends to be concentrated.(4)In prefecture-level cities,public facility land and road land,whose percentages are increasing,belong to growing structures,while residential land,industrial land,warehouse land,municipal utility land,and green land whose percentages are decreasing belong to declining structures.In county-level cities,industrial land,road land,municipal utility land,and green land belong to growing structures,while residential land,public facility land,and warehouse land belong to declining structures.For prefecture-level cities,Daqing has an absolute advantage in the growth of urban construction land,while Harbin,Jiamusi and Shuangyashan has a relative advantage in the growth of urban construction land,and only has an advantage in the growth of some types of construction land.For county-level cities,Suifenhe has an absolute advantage in the growth of urban construction land,while Shangzhi,Hailin,Zhaodong,Nehe and Ning’an has a relative advantage in the growth of urban construction land.(5)The proportion of the added value of the tertiary industry in the GDP of municipal districts,the total fixed asset investment in municipal districts and the area of urban roads will have a significant positive influence on the information entropy of the urban construction land structure of prefecture-level cities,and make the urban construction land structure system move in a disorderly direction.The urban permanent population and the general budgetary income of the local finance of municipal districts will have a significant negative impact on the information entropy of the urban construction land structure of prefecture-level cities,and the urban construction land structure system will develop in an orderly direction.The proportion of the added value of the tertiary industry in GDP,urban per capita disposable income,and the area of urban roads will have a significant positive impact on the information entropy of the urban construction land structure of county-level cities,while fiscal expenditure has a significant negative impact.(6)In general,the current prefecture-level cities in Heilongjiang Province mainly have problems such as excessive administration and public service land,insufficient green space and square land,and county-level cities mainly have problems such as excessive residential land,industrial land and insufficient green space and square land.Prefecture-level cities Jixi and Qitaihe and county-level cities Wuchang,Zhaodong,and Hailun have serious problems with the unreasonable structure of urban construction land. |
