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DEM Debris Flow Gradient QGIS 4 compatibility
Not QGIS 4 ready Active
Not yet — the latest version declares max QGIS version 3.99.0, so it is not offered to QGIS 4 users.
Batch calculates debris-flow main-channel longitudinal gradient from DEM using watershed polygons or outlet points.
About
DEM Debris Flow Gradient is a QGIS raster-analysis plugin for rapid calculation of debris-flow main-channel longitudinal gradient from DEM data. It provides two workflows: DEM with existing watershed polygons, or DEM with outlet points and automatic watershed delineation. The workflow includes depression filling, D8 flow direction, flow accumulation, outlet determination or snapping, watershed extraction, main-channel tracing, elevation-difference calculation and longitudinal-gradient calculation. Outputs include main-channel vectors, automatically delineated watershed polygons in outlet-point mode, and CSV statistics. GeoPackage, Shapefile and GeoJSON are supported. Results should be visually checked before engineering or hazard-assessment use. Method reference: Zhang Su, Rapid Calculation Method of Debris-Flow Watershed Longitudinal Gradient Based on DEM, 2018(09): 238-239. This plugin independently implements and extends the workflow, including automatic watershed delineation from outlet points.
| Author | Zhang Y.H. |
|---|---|
| Downloads | 278 |
| Latest version | 1.0.1 |
| Last updated | 2026-09-04 (41 days ago) |
| Min QGIS | 3.28.0 |
| Max QGIS | 3.99.0 |
| QGIS 4 ready | No |
| Maintenance | Active |
| Categories | Hydrology & water, Raster & terrain |
| Tags | dem, debris flow, hydrology, watershed, terrain analysis, longitudinal gradient |
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Maintenance: Active = updated within 1 year, Quiet = 1–3 years, Likely abandoned = over 3 years.