{"name": "QEHT Engineering Hydrology", "package_name": "qeht", "description": "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\ndesigner needs at every crossing, with every computation running inside\nQGIS using only NumPy and the GDAL bindings that QGIS ships. It never\nstarts another process, so it works on managed workstations where\nsecurity software blocks the SAGA, GRASS, TauDEM or WhiteboxTools\nproviders, and it needs no pip installation.\n\nTerrain and drainage: DEM preparation and audits (nearest-neighbour\nresampling, undeclared NoData), depression filling, D8 flow direction with\nBarnes (2014) or toward-lower flat resolution, flow accumulation, streams\nwith Strahler order, catchments, longest flow paths and the four slope\nmeasures used in design.\n\nRoad drainage: crossing candidates along the alignment with chainage,\nburning culverts through embankments, ground profile, a drainage-coverage\ncheck (missing crossings, sags, flat stretches) with proposed crossings,\na check against mapped rivers, floodplain width and channel sections at\ncrossings, corridor auto-clip for national DEMs, and DEM-error uncertainty\nof area and time of concentration at each crossing.\n\nCatchment parameters: soils and USLE K from SOTWIS, SoilGrids or any soil\nmap; hydrologic soil groups, curve numbers and Rational C; rainfall zones\nand mean annual rainfall; land-cover scenarios; time of concentration by\nKirpich, Kerby-Kirpich, SCS lag, TR-55 and Bransby-Williams with validity\nflags; erosion indices, RUSLE and side-drain siltation screening.\n\nOutputs: a one-click pipeline with a fixed folder layout, an HTML run\nreport, a one-row-per-crossing characteristics table, raster quicklooks,\nKMZ and XLSX exports, and a self-describing GeoPackage (design hydrology\npackage) for design software. Proxies and estimates are labelled as such\nin every output; no engineering value is invented.\n\nLicensed under the GNU General Public License version 2 or later.", "homepage": "https://github.com/EdmondAkello/qeht", "repository": "https://github.com/EdmondAkello/qeht", "tracker": "https://github.com/EdmondAkello/qeht/issues", "author": "Edmond Akello", "tags": ["hydrology", "watershed", "catchment", "dem", "d8", "flow accumulation", "drainage", "strahler", "engineering", "road", "culvert", "curve number", "time of concentration", "erosion", "rusle", "processing"], "downloads": 1109, "latest_version": "1.0.1", "versions": [{"version": "1.0.1", "experimental": false, "qgis_min": "3.22.0", "qgis_max": "4.99.0", "downloads": 368, "uploaded_by": "EdmondAkello", "upload_datetime": "2026-10-11T04:46:02.155255"}, {"version": "0.8.3", "experimental": false, "qgis_min": "3.22.0", "qgis_max": "4.99.0", "downloads": 737, "uploaded_by": "EdmondAkello", "upload_datetime": "2026-08-23T07:24:47.935837"}]}