HydroBASINS lev08 watershed · #1080707210
Bassin de la Sirba
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 2 administrative regions : Gnagna, Komandjoari
Sub-basin area
391km²
Upstream area
7 850,8km²
Discharge
4,63m³/s
Mean elev.
279m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #1080710420655 km²
- Bassin de la Sirba440 km²
2 dept-equivalent regions (GADM L2)
- 344.6 km²88.5% of basin
- 44.9 km²11.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
83 distinct species · 187 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 6 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 la Sirba : 5 espèces reliées par 4 interactions GloBI sur 1 type (connectance 26.7%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
28,3°C
Annual rain
611mm
Moisture idx (CMI)
-0,70
Runoff
17mm/an
PET
2 061mm
AET
514mm
Mean slope
0,5°
Water table
108cm
Forest
0%
Crops
21%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)