Monitoring changes in the state of vegetation cover on the section of the Sakhalin-2 project pipeline route according to space imagery data
The construction of underground main oil and gas pipelines leads to significant changes in natural landscapes. During the construction of main pipelines, felling of forest massifs is carried out. There is a high probability of the development of exogenous geological processes in the presence of mountainous relief and abundant precipitation. Revegetation control of pipelines is very important, and special attention should be paid to control when laying pipelines through specially protected natural areas. The article presents the results of assessing the nature and dynamics of the restoration of the vegetation cover on the section of the Sakhalin-2 gas pipeline in the Dolinsky sanctuary based on the results of calculating NDVI from satellite images using geoinformation technologies, and checking the results by field research data. The purpose of the research is to analyze the change in the state of the vegetation cover, determined by the volume of phytomass (calculation by NDVI) based on space monitoring data. Methods: interpretation and analysis of space images from spacecraft of the Landsat and Sentinel-2 family for the period from 2001 to 2021, geoinformation mapping of changes in the state of vegetation on the ArcGIS platform. Results: 5 stages of change in the state of the vegetation cover in the studied time interval were identified. The results show re-vegetation 10 years after the completion of the pipeline. Good restoration of valley forests and grass cover was noted. Sparse vegetation is common in sections of the pipeline where biological reclamation has not been carried out. As result of work carried out, an increase in NDVI revealed, and, consequently, the presence of good conditions for the growth of plant communities, typical for the investigated section of the pipeline of the Sakhalin-2 project after completion of construction work.