|Table of Contents|

Analysis of key ecological impact factors in construction area of expressways in Qinling Mountains(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2025年03期
Page:
128-140
Research Field:
交通工程
Publishing date:

Info

Title:
Analysis of key ecological impact factors in construction area of expressways in Qinling Mountains
Author(s):
BAI Hua1;  ZENG Lin1;  LI Jia-jia1;  LIU Ya-lei2
(1. School of Architecture, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Planning and Construction Department, Development and Construction Management Center of Jingwei New City, Xi'an Economic and Technological Development Zone Management Committee, Xi'an 710018, Shaanxi, China)
Keywords:
road engineering;  road area ecology;  principal component analysis;  engineering landscape;  highway engineering
PACS:
U411
DOI:
10.19721/j.cnki.1671-8879.2025.03.011
Abstract:
In response to the certain negative impacts of the construction of expressways in mountainous areas on the ecological environment along the routes, but the lack of in-depth research on the key influencing factors, this study focused on the ecological disturbance mechanism of the linear construction projects of expressways in the Qinling Mountains and explored the key factors affecting the ecological environment along the construction routes of expressways in the Qinling Mountains. Firstly, based on the existing relevant research results, combined with the characteristics of the construction projects and the ecological environment along the routes of expressways in the Qinling Mountains, the mechanism of the impact of the construction of expressways in the Qinling Mountains on the ecological environment along the routes was sorted out. Typical and representative evaluation indicators were selected, and a multi-level and multi-dimensional evaluation index system for the ecological impact of the construction of expressways in the Qinling Mountains was constructed in accordance with local conditions. Secondly, the ecological equivalent control principle was applied, and eight expressways with similar ecological backgrounds in the Qinling Mountains were selected for empirical analysis. The principal component analysis(PCA)method was used to reduce the dimensions of multiple indicators, extracting one principal component and calculating the weight of each evaluation indicator and the comprehensive score of each expressway. Finally, based on the evaluation results, differentiated restoration suggestions for the ecological environment along the routes of expressways in the Qinling Mountains were proposed. The research results show that the ecological environment along the construction routes of expressways in the Qinling Mountains is most susceptible to the loss of forest and grass vegetation, the balance of excavation and filling, and the ratio of bridges and tunnels. It is also relatively susceptible to the proportion of permanent occupation of non-construction land, the loss of agricultural vegetation, the increase in soil erosion, and the ecological restoration of temporary land use. In addition, vegetation restoration, green coverage, and the degree of soil erosion control also have certain impacts on the ecological environment along the routes.7 tabs, 6 figs, 25 refs.

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Last Update: 2025-05-30