HydroBASINS lev08 watershed · #1080021690
Bassin de Onge
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 3 administrative regions : Fako, Meme, Ndian
Sub-basin area
1 334,8km²
Upstream area
1 334,8km²
Discharge
18,42m³/s
Mean elev.
629m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 598.2 km²45.0% of basin
- 368.0 km²27.7% of basin
- 317.8 km²23.9% of basin
2 intersecting protected areas
Mont Cameroun
IUCN IINational Park
397.76 km² overlap
Estuaire du Rio Del Rey
IUCN Not ReportedWetland of International Importance (Ramsar Site)
93.36 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 309 distinct species · 29 540 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 Onge : 18 espèces reliées par 14 interactions GloBI sur 3 types (connectance 9.2%, 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°
21,8°C
Annual rain
3 113mm
Moisture idx (CMI)
0,55
Runoff
1 746mm/an
PET
1 384mm
AET
1 291mm
Mean slope
7,4°
Water table
105cm
Forest
92%
Crops
12%
Urban
8%
Protected
39%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)