Distribution and Degradation Processes of Isolated Permafrost near Buried Oil Pipelines by Means of Electrical Resistivity Tomography and Ground Temperature Monitoring: A Case Study of Da Xing'anling Mountains, Northeast China

被引：5

作者：

Wu, Gang ^{[1
,2
,3
]}

Li, Guoyu ^{[1
,3
,4
]}

Cao, Yapeng ^{[1
,3
]}

Chen, Dun ^{[1
,3
]}

Qi, Shunshun ^{[1
,2
,3
]}

Wang, Fei ^{[5
]}

Gao, Kai ^{[1
,2
,3
]}

Du, Qingsong ^{[1
,2
,3
]}

Wang, Xinbin ^{[1
]}

Jing, Hongyuan ^{[6
]}

Zhang, Zhenrong ^{[7
]}

机构：

[1] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Da Xinganling Observat & Res Stn Frozen Ground Eng, Daxinganling 165000, Peoples R China

[4] Xian Univ Sci & Technol, Coll Architecture & Civil Engn, Xian 710054, Peoples R China

[5] Jiangsu Univ, Fac Civil Engn & Mech, Zhenjiang 212013, Peoples R China

[6] PipeChina North Pipeline Co, Langfang 065008, Peoples R China

[7] PipeChina North Pipeline Co, Daqing Jiagedaqi Oil Gas Transportat Branch, Jiagedaqi 165000, Peoples R China

来源：

REMOTE SENSING | 2023年 / 15卷 / 03期

基金：

中国国家自然科学基金;

关键词：

electrical resistivity tomography; permafrost monitoring; permafrost degradation; climate warming; permafrost and talik distribution; geophysical methods; DISCONTINUOUS PERMAFROST; HINGGAN MOUNTAINS; INVERSION; MOHE; CONSTRAINT; JIAGEDAQI; CLIMATE; SMOOTH; BLOCKY; ROUTE;

D O I：

10.3390/rs15030707

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Human engineering activities and climate warming induce permafrost degradation in the Da Xing'anling Mountains, which may affect the distribution of permafrost and the safety of infrastructure. This study uses the electrical resistivity tomography method, in combination with field surveys and ground temperature monitoring, to investigate the distribution and degradation characteristics of permafrost and influencing factors at a typical monitoring site (MDS304) near the China-Russia Crude Oil Pipeline (CRCOP). The results show that the isolated permafrost in this area is vulnerable to further degradation because of warm oil pipelines and thermal erosion of rivers and ponds. The isolated permafrost is degrading in three directions at the MDS304 site. Specifically, the boundary between permafrost and talik is on both sides of the CRCOP, and permafrost is distributed as islands along a cross-section with a length of about 58-60 m. At present, the vertical hydrothermal influence range of the CRCOP increased to about 10-12 m. The active layer thickness has increased at a rate of 2.0 m/a from about 2.4-6.8 m to 2.5-10.8 m from 2019 to 2021 along this cross-section. Permafrost degradation on the side of the CRCOP's second line is more visible due to the river's lateral thermal erosion, where the talik boundary has moved eastward about 12 m during 2018-2022 at a rate of 3.0 m/a. It is 2.25 times the westward moving speed of the talik boundary on one side of the CRCOP's first line. In contrast, the talik boundary between the CRCOP's first line and the G111 highway also moves westward by about 4 m in 2019-2022. Moreover, the maximum displacement of the CRCOP's second line caused by the thawing of frozen soil has reached up to 1.78 m. The degradation of permafrost may threaten the long-term stability of the pipeline. Moreover, the research results can provide a useful reference for decision-makers to reduce the risk of pipeline freeze-thaw hazards.

引用

页数：24