HydroBASINS lev08 watershed · #1081098870
Bassin de Boulou
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 across 2 countries : Boumba et Ngoko, Ouesso
Sub-basin area
745,5km²
Upstream area
745,5km²
Discharge
5,74m³/s
Mean elev.
448m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 742.0 km²100.0% of basin
- 0.1 km²0.0% of basin
3 intersecting protected areas
Lobéké
IUCN IINational Park
240.15 km² overlap
Sangha Trinational
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
226.92 km² overlap
Partie camerounaise du fleuve Sangha
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
28 distinct species · 41 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 Boulou : 6 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 4 interactions GloBI sur 2 types (connectance 26.7%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
24,5°C
Annual rain
1 631mm
Moisture idx (CMI)
-0,03
Runoff
243mm/an
PET
1 684mm
AET
1 332mm
Mean slope
2,7°
Water table
182cm
Forest
100%
Crops
0%
Urban
0%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)