Bihar relief

Copernicus GLO-30 · UTM-true heights, plain stored exactly

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Decimal degrees, either order. Drops a marker and opens the readout.

Terrain

Elevation colour

Cells above the range are left uncoloured (hillshade only). Narrow the range to stretch colour across the flood belt, e.g. 25–60 m for the Kosi.

Hillshade

Contours

Computed in-browser from the DEM; drawn only inside the colour range.

Flood history (Landsat 1984–2021)

threshold–25 25–50 50–75 ≥75 (river)

JRC Global Surface Water. Cloud hides peak floods, so this under-counts short events — read it as a floor on flood frequency, not a ceiling.

River stage scenario (HAND)

shallow deep

Cells lower than the stage rise relative to their nearest stream. Static water-level geometry, no flow, no embankments — "could reach", not "will reach".

Population (GHSL 2020)

2 10 30 100 300+
0 2 4 6 8 %+

Exposure counts people whose pixel the satellite saw wet — settlements sit on the high ground, so this is the population living on flood-prone land, not everyone a big flood reaches.

Layers

Click the map for elevation. Drag with right mouse / Ctrl to tilt and rotate.

DEM © ESA Copernicus GLO-30 · water JRC/Google GSW · population GHSL GHS-POP · rivers HydroSHEDS · towns GeoNames · embankments © OSM · boundaries geoBoundaries CC BY 4.0