基于土地利用强度的城市道路增长模拟模型与案例分析

An Urban Road Growth Simulation Model Based on Land Use Intensity

城市交通与土地利用相互作用、相互影响。传统的城市空间模拟研究多关注交通对土地利用变化影响,缺少土地利用对路网空间形态影响的模拟。已有研究通常使用静态路网,不能表达土地利用与交通间的动态相互作用关系。本文以城市土地利用强度与城市道路网络空间分布间的正向关系,提出了基于城市土地利用强度的城市路网增长模拟模型。以唐山市为例,对其城市环路内的道路增长进行了模拟。结果表明,该模型能以城市土地利用强度的空间分布特征快速生成路网,反映城市土地利用对道路网络扩张的影响。模拟结果与实际路网具有高度的空间分布相似性。该模型可进一步与土地利用模拟模型结合,模拟城市土地利用与交通的动态相互作用。

Urban land use dynamically interacts with urban transportation. However, traditional urban space simulation models only focus on the simulation of the impacts of urban transportation on the dynamic changes of urban land use, by using a static road network. Therefore, they cannot express the dynamic interactions between urban land use and transportation. As a result, a simulation model for the dynamic growth of urban road network is required when developing an urban space simulation model with the capability to simulate the dynamic interac- tions between urban land use and urban transportation. In this paper, an urban road network growth simulation （URGS） model was proposed based on the observed relationship between urban road network density and land use intensity. It is known as the fact that road density is usually proportional to urban land use intensity. The city of Tangshan, which locates in Hebei province, China was taken as the study area. The road network of Tangshan within the City Ring road was reconstructed using the URGS model based on current land use intensity. Results show that the generated road network has a close similarity with the real road network. The URGS model can generate an intuitionistic road network automatically and quickly based on the spatial distributions of land use. Therefore, the impacts of urban land use on road network expanding can be reflected in the URGS model. The impacts of land use on road network would be simulated using the URGS model if the spatial distribution of land use were generated from the traditional urban land use simulation model. Moreover, in the future, the URGS model can be further improved to integrate with urban land use simulation model, thus to produce an urban space simulation model that can simulate the dynamic interactions between urban land use and transportation.