Project Description

Project Overview

3vGeomatics conducted a historical analysis and processed data on a transportation corridor along the Thompson River near Ashcroft, British Columbia. This 10-kilometer stretch has numerous slope instabilities that threaten a major highway and two railways.

*Header image not of actual road featured in case study

Ashcroft, British Columbia

Sector:
Transportation Network

Product/Service:
Historical Analysis

Satellite / Wavelength:
RADARSAT-2 (RS2); C-band

Goals

  • Identify potentially hazardous active displacement areas across vast tracts of linear infrastructure using InSAR.

  • Demonstrate how InSAR can monitor entire networks of infrastructure simultaneously to prioritize risk areas.

3vGeomatics analyzed 86 RADARSAT-2 images acquired between September 2013 and November 2019. Focusing on a zone 18 km wide by 52 km long, displacement was identified in 18 distinct areas. The area outlined above is a 6km x 12km subset of the monitoring area.

Solution & Results

3vGeomatics analyzed 86 RADARSAT-2 images acquired between September 2013 and November 2019. Focusing on a zone 18 km wide by 52 km long, displacement was identified in 18 distinct areas. The fastest displacement measured was over 16 cm/year, while the slowest was less than 1 cm/year. The high sensitivity of InSAR measurements facilitated the identification of unknown displacement, as well as locating the extent of known displacement areas. The results were presented as a rate map and as thousands of time series graphs showing displacement histories for points within the displacement areas.

InSAR’s wide coverage, density, scalability, sensitivity, and archive availability is a preemptive measure against geohazards over vast regions. The high sensitivity of InSAR measurements facilitated the identification of unknown displacement, as well as locating the extent of known displacement areas.

Identifying instabilities for inspection, mitigation, and remediation.

Provided advanced reconnaissance for the discovery and prioritization of displacement locations for in-situ scrutiny by local engineers and government authorities.

Achieved scalable InSAR solutions for larger networks of transportation corridors including road and railway networks.

An area of significant displacement is observed crossing the railway network leading into Ashcroft. Results of the monitoring identified 18 areas of displacement. The fastest displacement measured was over 16 cm/year, while the slowest was less than 1 cm/year.

Benefits

3vGeomatics provides cost-effective and efficient solutions for both historical analysis and ongoing monitoring of geohazards that threaten transportation infrastructure. Our monitoring services can be used as a standalone monitoring system or to complement in-situ instrumentation. InSAR’s wide coverage, density, scalability, sensitivity, and archive availability is a preemptive measure against geohazards over vast regions.

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