与地形相关的街道网络分析及其对快速增长型城市的意义(英文)

编号 zgly0001584910

文献类型 期刊论文

文献题名 与地形相关的街道网络分析及其对快速增长型城市的意义(英文)

作者 NahidMOHAJERI  AgustGUDMUNDSSON 

作者单位 DepartmentofGeography  UniversityCollegeLondon  GowerStreetPearsonBuilding  London  WC1E6BT  UK  SolarEnergyandBuildingPhysicsLaboratory(LESO-PB)  EcolePolytechniqueFédéraledeLausanne(EPFL)  1015Lausanne  Switzerland  DepartmentofEarthScienc 

母体文献 Journal of Geographical Sciences 

年卷期 2014年02期

年份 2014 

分类号 TU984 

关键词 streetnetworks  entropy  landscapes  GIS  spatialanalysis 

文摘内容 In addition to socio-economic factors, major landforms may affect the city structure and urban form. Here we show that landforms have significant effects on the city shape and street patterns of the fast-growing Iranian cities of Dezful(a river) and Khorramabad(mountains and valleys), but no clear effects on the cities of Yazd and Nain. Also, where the street orientation is peaked, the Gibbs/Shannon entropy(a measure of dispersion or spread) is low, but increases as the distribution becomes more uniform because of landform constraints. The streets in the old inner parts of all the cities are, on average, shorter and denser(more streets per unit area) than the streets of the newer outer parts. The entropies of the outer parts are also greater than those of the inner parts, implying that the street-length distribution gradually becomes more dispersed or spread as the city expands. All these cities have been fast growing in the past decades, with the newer outer parts expanding rapidly. As shown here, the rapidly formed outer parts(with greater dispersion in street patterns) have significantly different textures from those of the older inner parts, indicating different functionality and growth processes. These quantitative methods for street-network analysis can be used worldwide, particularly for analysing the effects of landforms on city shape and texture.