Home › Hydrology & water › DDM HydroLogic
DDM HydroLogic QGIS 4 compatibility
QGIS 4 ready Active
Yes — DDM HydroLogic supports QGIS 4 (declared max version 4.99.0).
Delineate and create model-ready catchments interactively. Trace D8 flow paths, selects the streams that matter, drop an outlet line, and export straight to GeoPackage, RORB, WBNM, XP-RAFTS, TUFLOW or URBS.
About
Setting up a hydrologic model usually means a few hours of GIS prep work before the modelling even starts. DDM HydroLogic condenses some of the initial steps into one interactive session: it traces D8 flow paths from a DEM, ranks them by Strahler order, and lets you pick the relevant drainage. Draw an outlet line, move onto the subcatchment breakdwon window, and DDM HydroLogic cuts the catchment into dissolved subcatchment polygons — then you have choices of exporting as: GeoPackage of flow paths and subcatchments, RORB .catg GE-ready catchment file, WBNM .wbn runfile, XP-RAFTS .xpx exchange file, some of the most popular TUFLOW xxx_R.shp, or URBS .vec routing and .csv catchment files. It is important to note that all hydrological/hydraulic choices and parameters, such as rainfall, losses, Manning's coefficients, subcatchment types, etc.. have been deliberately left blank or default values. Anything the DEM can measure - sub-area areas, reach lengths and slopes - is calculated and written into the model files. Requirements and notes: QGIS 3.22 or newer, with no extra Python packages to install (it relies on the numpy and GDAL libraries already bundled with QGIS). Work for DEMs in projected CRS for meaningful areas and lengths. Licensed under the GNU General Public License version 2 or later
| Author | Davide Di Mauro |
|---|---|
| Downloads | 3,239 |
| Latest version | 2.3 |
| Last updated | 2026-09-15 (30 days ago) |
| Min QGIS | 3.22.0 |
| Max QGIS | 4.99.0 |
| QGIS 4 ready | Yes |
| Maintenance | Active |
| Category | Hydrology & water |
| Tags | strahler, tuflow, subcatchment, dem, xp-rafts, d8, catchment, wbnm, watershed, rorb, hydrology, urbs |
Homepage · Repository · Issue tracker · Official page
Alternatives in Hydrology & water
- CrayfishQGIS 4 ready
Tools for mesh layers QGIS
- ArcGeek CalculatorQGIS 4 ready
ArcGeek Calculator is a QGIS plugin that provides a comprehensive set of tools for coordinate calculations, conversions, spatial operations,
- TUFLOWQGIS 4 ready
A collection of utilities for TUFLOW flood and coastal simulation in QGIS
Related plugins
- QEHT Engineering HydrologyQGIS 4 ready
Road-drainage and catchment hydrology from a DEM, computed entirely inside QGIS: no external executables, no extra Python packages.
- Runoff Model BuilderNot QGIS 4 ready
Builds RORB and URBS control vector from a catchment.
- RORB catg/stm EditorQGIS 4 ready
Table-format viewer and editor for RORB .catg and .stm files — fully edit catchment node/reach data and create or edit storm files interacti
- Basin HydroRiskQGIS 4 ready
Preliminary hydrological and basin analysis from rainfall data and digital terrain models, including design rainfall, Gumbel EV1, GEV, Norma
- Forest PlannerQGIS 4 ready
From forest census to management plan: drainage network, riparian buffers, log landings, skid trails, haul roads and impact areas for Amazon
- HydroNet StudioQGIS 4 ready
[EN] It extracts a topographically consistent drainage network from a DTM/DEM using six flow-routing models: D8, D-Infinity (D∞), Rho8, MFD,
Maintenance: Active = updated within 1 year, Quiet = 1–3 years, Likely abandoned = over 3 years.