广东区域可达性综合探测及空间分异特征研究

STUDY ON GUANGDONG REGIONAL ACCESSIBILITY COMPOSITE MEASURES AND SPATIAL DIFFERENCES CHARACTERISTICS

本文以广东省陆路交通网络为对象,综合利用可达性度量模型对广东省区域可达性进行测算和空间特征分析,并进一步实现广东省省域的等级分区。结果表明,广东区域日可达性和时间可达性呈现出同心圆分布特征,并具有明显交通网络指向性;但在空间、交通网络结构和社会经济等因素的综合影响下,潜力可达性表现出多中心圈层的空间分异特征。研究揭示了广东省区域可达性的空间格局及分异规律,探讨了地理区位和城市发展在可达性空间分异中作用,从而为广东产业布局优化、土地集约化利用以及区域协调发展提供科学参考。

With the acceleration of current economic globalization and regional integration process,the province of Guangdong is under enormous pressure for dealing with the industrial structure adjustment and industrial layout optimization.This study firstly introduced the indices of urban central-functions strength into accessibility measure modeling,including daily-accessibility measure model,time-based accessibility measure model and potential-based accessibility measure model.And then,a combination of these models were implemented to calculate different districts＇ accessibility indices for accessing the regional accessibility in the province of Guangdong.Moreover,geography information system（GIS） and Kriging spatial interpolation technologies were applied to draw contour maps for illustrating the spatial distribution and regional differences of the accessibility in the areas of the province of Guangdong.At last,the study used multiple accessibility coefficients to implement a grade partition in the areas in the areas of Guangdong.According to the isochrones derived from the districts＇ accessibility indices and Kriging spatial interpolation method in GIS,the contour maps show the spatial patterns of the daily-and time-based accessibility in the province of Guangdong are represented by a concentric distribution structure with the center of Pearl River Delta.As a consequence,the districts in the Pearl River Delta,which is the economic center of the province of Guangdong,have the best accessibility and economic ties intensity.But the districts in the north and east and west wings,where are away from the economic center（i.e.,the Pearl River Delta）,have the worst accessibility.In short,this study focuses on revealing the spatial patterns characteristics and spatial difference disciplines in the regional accessibility in the province of Guangdong.