Location

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Data Sources

Geocoding — waiting
Precipitation — waiting
Soils — waiting
Elevation (30m DEM) — waiting

Fetched Data

Simulation

Watershed Area 2.5 km²
Rainfall Depth 25 mm
Storm Duration 6 hr

Export GIS

Export GIS data (CSVs + WKT), visual outputs (3D terrain, hydrograph, drainage map as PNG), and a full summary report. All files tagged with location, soil, and simulation metadata.
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Runoff C
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Volume (m³)
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Peak (m³/s)
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Elev (m)

📊 Drainage Analysis Results

This map displays simulated surface water flow patterns overlaid on a hillshaded Digital Elevation Model sourced from AWS Terrain Tiles (Terrarium encoding, ~19 m/pixel at zoom 13, ~5 km coverage). Switch to the 3D Terrain tab for an oblique perspective view. Flow directions are computed using the D8 algorithm on a 100×100 subsampled grid with Planchon–Darboux depression filling. Runoff estimates use the Rational Method (Q = C × i × A). Hover over the KPI cards above for detailed metric descriptions.
Stream Network — Modeled channels where surface runoff concentrates, identified by upslope contributing area exceeding a flow accumulation threshold.
Watershed Boundary — The total land area that drains to the identified outlet point at the DEM grid boundary. Delineated by upstream tracing from the outlet.
Flow Path — Primary drainage route traced from the analysis point downhill to the watershed outlet, following steepest-descent flow directions.
Pooling Areas — Zones of high flow convergence where water accumulates, indicating potential ponding, flooding, or drainage infrastructure needs. Circle size reflects relative accumulation.
Elevation (DEM)
Low High
Stream Network
Watershed
Flow Path
Pooling Areas
3D terrain rendering

Select a location and fetch data to begin drainage analysis