HydroBASINS lev08 watershed · #1080022440
Bassin de Osiama Creek
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 : Brass, Sagbama, Southern Ijaw
Sub-basin area
404,7km²
Upstream area
404,8km²
Discharge
25,06m³/s
Mean elev.
14m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 271.3 km²67.3% of basin
- 85.3 km²21.2% of basin
- 46.2 km²11.5% of basin
1 intersecting protected areas
Apoi Creek
IUCN Not ReportedForest Reserve
2.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 distinct species · 6 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
26,6°C
Annual rain
3 274mm
Moisture idx (CMI)
0,54
Runoff
1 646mm/an
PET
1 505mm
AET
1 354mm
Mean slope
0,5°
Water table
12cm
Forest
100%
Crops
14%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)