Landslide
Rainfall-triggered slope failure where intense rain meets steep ground.
The question it answers
Which assets sit where intense rainfall and steep slopes combine to make slope failure credible?
Screening landslide across a portfolio
- Screens assets for rainfall-triggered landslide exposure.
- Combines extreme-rainfall indices with the steepness of the site.
- Bands the result and projects it across scenarios and horizons.
Inputs in, banded result out
The governed model combines the inputs below into a single banded, scenario-aware result, under formal version and change control.
Inputs
- Extreme-rainfall indices (rx1day, rx5day)
- Site slope
Governed model
Landslide
Anchored to public, peer-reviewed climate science.
Version and change controlledOutputs
- Asset landslide band
- Scenario–horizon trajectory
What goes in, and where it comes from
-
Extreme-rainfall indices (rx1day, rx5day)
CMIP6
The rainfall trigger — short, intense bursts and multi-day totals.
-
Site slope
Global DEM
The susceptibility factor — steeper ground fails more readily.
The futures we test
- Rainfall extremes are read per SSP scenario and horizon.
- Slope is treated as the present-day terrain the rainfall acts on.
- The band reflects the combination of trigger and susceptibility, not soil mechanics.
How the result is built
- Read extreme-rainfall indices at the asset cell for each scenario and horizon.
- Weight by site slope so steep locations score higher for the same rainfall.
- Combine into a composite score and band on the shared physical-risk axis.
- Build the trajectory across horizons.
What you get back
-
Asset landslide band
Slope-failure exposure at screening resolution.
-
Scenario–horizon trajectory
How exposure tracks rainfall intensification.
- Low
- Medium
- High
Landslide exposure trajectory
Trajectories follow rainfall intensification, which rises under higher scenarios.
How to read the band
- High bands need both ingredients — intense rainfall and steep ground; flat sites screen low even in wet climates.
- A lighter model: it flags where a geotechnical review is worth commissioning, not where a slope will fail.
- Read alongside the pluvial model where both rainfall hazards matter.
Disclosure relevance
- IFRS S2 Identification of geophysical hazards triggered by climate extremes.
- TCFD Physical hazard screening coverage.
Limitations
- Screening scope: not a geotechnical or soil-stability model.
- Soil type, geology, vegetation and drainage are not represented.
- 0.25° rainfall inputs smooth the local convective extremes that trigger many slides.
Services
Screening-level analysis; not investment or engineering advice.
Bring landslide screening to your portfolio
Screened, banded and framed for IFRS S2 and TCFD disclosure.