How Climate Data Reveal Landslide Risks Along Pipelines

Early warning for vulnerable corridors

A network of more than 400,000 kilometres of active pipelines runs through the Western Canada Sedimentary Basin (WCSB). On roughly one in ten routes, a pipeline crosses terrain prone to landslides. Slow, deep-seated slope movements often remain inconspicuous for long periods but can accelerate over months to years and damage pipelines. That leads to high costs, environmental impacts and safety risks.

Hydroclimatic signals as triggers

Accelerations of large, deep-seated landslides are often linked to longer-term changes in soil moisture and pore-water pressure. As saturation increases, friction within the soil decreases while the load on the slope rises. Information on precipitation, soil moisture, evaporation and runoff therefore indicates how close a slope is to a critical state.

Role of reanalysis datasets

Reanalysis products such as ERA5 and ERA5-Land consolidate historical atmospheric and land-surface variables in a spatially consistent way and with high temporal resolution. Where monitoring networks are sparse, they provide a continuous view of hydroclimatic developments. Combined with local terrain and geological data, risk assessments become more robust — both spatially and temporally.

Practical case in western Canada

Regional pipeline operators worked with BGC Engineering to investigate the drivers of large, deep-seated landslides. Observed slope movements were compared with ERA5 and ERA5-Land signals to determine which indicators typically precede an acceleration and what lead times they show.

Findings and measures

The analysis showed that prolonged elevated soil moisture and repeated heavy precipitation events often precede landslide accelerations. From this it is possible to derive thresholds and early-warning times. Operators can, among other actions:

– selectively reinforce and stabilise vulnerable slope sections; – adjust inspection intervals and install additional sensors in high-risk zones; – temporarily reduce pipeline pressure or pause operations when increased slope movement is detected; – adapt route planning and maintenance strategies over the long term to changing climate patterns.

Added value of data synthesis

Combining field observations with ERA5 data delivers more than isolated alerts. Long-term time series help separate short-term weather effects from stability-relevant trends. Spatial continuity makes it easier to assess entire networks rather than single monitoring points. Resources can be directed where risk is highest.

Limits and uncertainties

Model data do not replace on-site expertise. ERA5 captures meteorological and land-surface variables at broad scales; local soil structure, groundwater and human interventions determine actual slope behaviour. Field validation with inclinometers, deformation measurements and geotechnical investigations remains essential. Uncertainties in precipitation, soil parameters and subsurface water flow require calibrated thresholds and continuous adjustment.

Climate change as a shifting baseline

More frequent heavy rainfall, altered snowmelt patterns and thawing of permafrost-affected soils change the baseline conditions. Historical thresholds therefore do not necessarily remain valid; monitoring and intervention concepts need adaptive mechanisms.

Transferability and implementation

The approach developed in western Canada demonstrates how reanalysis data and field observation can improve operational decision-making. Other regions with pipeline networks in slope-prone terrain can benefit if they integrate reanalysis data into monitoring and selectively expand local measurement networks. Practical steps include building automated data pipelines, interfaces with operational GIS systems, back-testing with historical scenarios and upgrading monitoring points at hotspots. This creates a reliable basis for proactive risk management — as a complement to geotechnical expertise.