Research On The Impact Of High-speed Railway On The Spatial Structure Of The Pearl River Delta Region

In this thesis,through the way of combination of geographic information system and remote sensing to discuss the opening of the high-speed railway to the pearl river delta region spatial structure,the influence of regional transportation accessibility will affect the city's economic development and regional spatial structure and land use change,this study will use the accessibility and its change as high-speed railway spatial structure research comes in.From the perspective that the opening of high-speed railway will directly lead to the evolution of the accessibility bureau,this thesis studies the influence of the construction of high-speed railway along the Pearl River Delta on the accessibility bureau,population and economy,and land use change,and then establishes the analysis framework of the regional spatial effect of high-speed railway.The main research contents and conclusions are as follows:(1)Based on distance model,through the shortest travel time,the weighted average travel time,these three indicators to measure accessibility coefficient node accessibility,mid analysis prior to the construction of the high-speed railway,construction,construction situation of the three time node the accessibility of changes.The pearl river delta region of the nine cities as the research object,using O-D matrix to solve the shortest travel time,then the weighted average travel time,accessibility coefficient,analysis of high-speed trains for cities in the area of the influence of the character of situation.The research results show that high iron with a strong time compression effect,effectively shorten the travel time,improve the level of the overall regional accessibility.Opened high-speed,high-speed city form an hour communication circle,elements between urban integration speeding up,the urban internal cohesion.(2)The development of high-speed rail promotes the development of urban land use and guides its development direction.The urban land use type,which was originally dominated by forest land,has been changed,and it has gradually diversified.The area of cultivated land has been decreasing year by year,But in recent years,the cultivated land reducing speed slow;The area of construction land in great increase at the beginning of the high-speed railway construction,and perfect gradually as the city's rail line,construction land growth slows.High-speed impact on urban land use type and the level of city also exists certain contact,the higher the city grade,the greater the stability of the land use structure.(3)High-speed railway stations have different impacts on different cities of different sizes,and different locations of high-speed railway stations have different impacts on the population of surrounding cities It is not attractive to the urban population which is geographically far away and has weak economic strength.With the construction of high speed railway,the intensity of economic ties between the Pearl River Delta cities has gradually increased,the potential of each city's location advantage has increased,and the cities with strong economic strength and large scale have benefited more after the opening of high speed railway,the economic development level of the first-and second-tier cities shows a sharp upward trend,and the rising speed is gradually slowing down;the economic development level of other cities still needs further improvement.