Emergency road networks(ERNs),an important part of local disaster prevention systems,can provide security to residents and their property.Exploring the ERNs structure is of great significance in terms of promoting disaster prevention and establishing road safety in dangerous mountainous areas.This study considered the ERNs of the Kangding section of the Dadu River Basin as the area for a case study.Complex Network Analysis was used to examine the relationship between the four characteristic indicators of mountain roads and the degree of earthquake impacts under the Lushan,Wenchuan,and Kangding Earthquake scenarios.Based on the analysis results,the southwest mountain road network was evaluated;then,computer simulations were used to evaluate the structural changes in the road network after index changes.The network was optimized,and the corresponding emergency avoidance network was proposed to provide a reference for the establishment of the mountainous ERN.The results show that the overall completeness of the mountainous ERNs in Southwest China is poor and prone to traffic accidents.Moreover,the local stability is poor,and the network is susceptible to natural hazards.The overall structure of the road network is balanced,but that of certain road sections is not.Road sections with different attributes present a"gathering-scattering"spatial distribution,i.e,some sections are clustered together while others are far apart.Accordingly,a planning optimization strategy is proposed to better understand the complexity and systematic nature of the mountainous ERN as a whole and to provide a reference for disaster prevention and mitigation planning in mountainous regions in Southwest China.

WEI Meng;HUANG Yong;WAN Dan;DENG Liang-kai

Faculty of Architecture and Urban Planning,Chongqing University,Chongqing 400030,China;Shanghai Urban Planning and Design Research Institute,Shanghai 200040,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing 400030,China;College of Architecture and Urban Planning,Tongji University,Shanghai 200092,China

山地科学学报（英文版）

[1]WEI Meng;HUANG Yong;WAN Dan;DENG Liang-kai-.Emergency road network structure and planning optimization in mountainous regions in Southwest China under earthquake scenarios)[J].山地科学学报（英文版）,2022(03):771-780

ERNs,Kangding,Lushan,ERN

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