High-Resolution DEMs of Difference for Chamoli Ice-Debris Flow Topographic Change

2-meter resolution digital elevation models of difference quantify vertical topographic change following the February 2021 Chamoli ice-debris flow in India. The raster data, created to support landscape change analysis and numerical modeling, are provided in GeoTIFF format for GIS software.

Use Cases

• Analyze vertical (z) topographic change in the Chamoli District by comparing pre- and post-event DEMs of difference.
• Support numerical modeling with CAESAR-Lisflood using high-resolution 2-meter raster data for geospatial simulation.
• Detect surface change patterns from the 2021 avalanche-debris flow event for hazard assessment and topographic reconstruction.

Strengths

• High-resolution 2-meter spatial detail for precise topographic change measurement.
• Specifically created for a major, documented geohazard event (February 2021 Chamoli ice-debris flow).
• Data format (raster .tif) is standard for GIS software and geospatial analysis.

Limitations

• Limited temporal coverage to the specific event period; does not provide a continuous time series.
• Spatial coverage is restricted to the affected Chamoli District area in Uttarakhand, India.
• Data requires specialized GIS software for analysis, limiting accessibility for non-geospatial practitioners.

Provenance

Source

Environmental Information Data Centre

Collection Method

Created as digital elevation models of difference (DoD) from geospatial data to quantify vertical change.

Time Range

Period surrounding February 7, 2021.

Freshness

Last updated in March 2026.

Geography

Chamoli District, Uttarakhand, India, Himalaya region.