Monitoring of gas pipelines state in Western Siberia using spaceborne SAR interferometry
Vvedensky square, 1,
The goal of the report is a discussion of the results of ERS and ENVISAT INSAR data analysis with a goal of monitoring the state of gas pipelines located in Western Siberia (period of 1993-1998). The area of study is a complicated one as it includes various types of covers – forested/deforested territories, swamps, permafrost, etc. Areas of interest for study are of high economical importance as they containing long gas pipelines providing gas transport to the West.
Preliminary analysis of the SAR data at hand by now shows large potential of the interferometry for the detection of radial displacements of the pipelines and monitoring of the economical activity in the gas production areas. In spite of the fact the pipe is narrower than the resolution cell it was possible to observe temporal displacements of portions of pipes located on the permafrost areas. Pairs with annual or more time interval between acquisitions show evidence of pipes uplift at centimeters level because of permafrost heave. Among the impressive results is a detection of surface displacements on the interferogram from ERS tandem pair obtained in summer conditions where the effect of pipes subsidence at the first millimeters scale took place because of permafrost thawing in summer time.
The results obtained allow the selection of the preferable seasons of the year for the data collection from a point of view of better interferometric coherence and reliable measurements of the infrastructure dynamics.
Authors express thanks to ESA for ERS and ENVISAT SAR data obtained under AO “Exploitation Projects” projects.