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QEHT Engineering Hydrology QGIS 4 compatibility
QGIS 4 ready Active
Yes — QEHT Engineering Hydrology supports QGIS 4 (declared max version 4.99.0).
Road-drainage and catchment hydrology from a DEM, computed entirely inside QGIS: no external executables, no extra Python packages.
About
QEHT turns a DEM and a road centreline into the hydrology a drainage designer needs at every crossing, with every computation running inside QGIS using only NumPy and the GDAL bindings that QGIS ships. It never starts another process, so it works on managed workstations where security software blocks the SAGA, GRASS, TauDEM or WhiteboxTools providers, and it needs no pip installation. Terrain and drainage: DEM preparation and audits (nearest-neighbour resampling, undeclared NoData), depression filling, D8 flow direction with Barnes (2014) or toward-lower flat resolution, flow accumulation, streams with Strahler order, catchments, longest flow paths and the four slope measures used in design. Road drainage: crossing candidates along the alignment with chainage, burning culverts through embankments, ground profile, a drainage-coverage check (missing crossings, sags, flat stretches) with proposed crossings, a check against mapped rivers, floodplain width and channel sections at crossings, corridor auto-clip for national DEMs, and DEM-error uncertainty of area and time of concentration at each crossing. Catchment parameters: soils and USLE K from SOTWIS, SoilGrids or any soil map; hydrologic soil groups, curve numbers and Rational C; rainfall zones and mean annual rainfall; land-cover scenarios; time of concentration by Kirpich, Kerby-Kirpich, SCS lag, TR-55 and Bransby-Williams with validity flags; erosion indices, RUSLE and side-drain siltation screening. Outputs: a one-click pipeline with a fixed folder layout, an HTML run report, a one-row-per-crossing characteristics table, raster quicklooks, KMZ and XLSX exports, and a self-describing GeoPackage (design hydrology package) for design software. Proxies and estimates are labelled as such in every output; no engineering value is invented. Licensed under the GNU General Public License version 2 or later.
| Author | Edmond Akello |
|---|---|
| Downloads | 828 |
| Latest version | 1.0.1 |
| Last updated | 2026-10-11 (4 days ago) |
| Min QGIS | 3.22.0 |
| Max QGIS | 4.99.0 |
| QGIS 4 ready | Yes |
| Maintenance | Active |
| Category | Hydrology & water |
| Tags | hydrology, watershed, catchment, dem, d8, flow accumulation, drainage, strahler, engineering, road, culvert, curve number, time of concentration, erosion, rusle, processing |
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Maintenance: Active = updated within 1 year, Quiet = 1–3 years, Likely abandoned = over 3 years.