HydroBASINS lev08 watershed · #1081178800
Bassin de Tana River
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 4 administrative regions : Bura, Fafi, Galole, Ijara
Sub-basin area
1 921,3km²
Upstream area
47 969,3km²
Discharge
170,49m³/s
Mean elev.
112m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tana River1843 km²
- Bassin de Tana River708 km²
4 dept-equivalent regions (GADM L2)
- 1352.5 km²70.7% of basin
- 303.9 km²15.9% of basin
- 213.4 km²11.2% of basin
- 43.0 km²2.2% of basin
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
510 distinct species · 975 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Tana River : 24 espèces reliées par 22 interactions GloBI sur 3 types (connectance 6.3%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
27,4°C
Annual rain
462mm
Moisture idx (CMI)
-0,76
Runoff
12mm/an
PET
1 912mm
AET
388mm
Mean slope
0,1°
Water table
29cm
Forest
5%
Crops
8%
Urban
0%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)