Dynamic Integrated Ecological Assessment along the Corridor of the Sichuan–Tibet Railway

Cuicui Ji, Hengcong Yang (), Xiangjun Pei (), Xiaochao Zhang, Lichuan Chen, Dan Liang, Yiming Cao, Jianping Pan and Maolin Chen
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Cuicui Ji: School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China
Hengcong Yang: School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China
Xiangjun Pei: State Key Laboratory of Geohazard Prevention and Geo-Environment, Chengdu University of Technology, Chengdu 610059, China
Xiaochao Zhang: State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu 610059, China
Lichuan Chen: Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China
Dan Liang: Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China
Yiming Cao: School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China
Jianping Pan: School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China
Maolin Chen: School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China

Land, 2024, vol. 13, issue 6, 1-21

Abstract: Engineering activities along the Sichuan–Tibet Railway (STR) could cause land degradation and threaten the surrounding ecological security. It is crucial to evaluate the integrated land ecology during and after the construction of this project. This study assesses the land ecology along the STR corridor from 2000 to 2022 using a transfer matrix, the analytic hierarchy process (AHP), and the PSR-TOPSIS model. The main results are as follows: (1) The novel comprehensive ecological assessment process including nine indicators is feasible. (2) The high-quality land ecological, surface vegetation, and environmental regions were concentrated in Ya’an and Nyingchi, whereas the low-quality regions were situated in Qamdo and Garze Tibetan Autonomous Prefecture. (3) There was an overall decline in the integrated land ecological quality along the STR from 2000 to 2022. While it steadily improved in the Ya’an and Nyingchi regions from 2010 to 2022, it continued to decline around the Qamdo region. (4) The most degraded land-use type during the 22 years was grassland, and farmland was the most secure land-use type. Overall, spatial analyses and examinations of residue disposal sites suggested that these locations have negatively impacted integrated land ecology since the beginning of the STR construction project. Our findings have implications for preserving the ecological ecosystem and ensuring the sustainability of the STR construction project.

Keywords: integrated ecological assessment; land use/land cover; AHP; PSR-TOPSIS; Sichuan–Tibet Railway (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
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