HydroBASINS lev08 watershed · #1081018220
Bassin de Otamiri 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 22 administrative regions : Aboh-Mbaise, Ahiazu-Mbaise, Ehime-Mbano, Etche, Ezinihitte Mbaise +17
Sub-basin area
2 491,8km²
Upstream area
2 491,8km²
Discharge
120,05m³/s
Mean elev.
87m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
22 dept-equivalent regions (GADM L2)
- 519.8 km²21.0% of basin
- 439.7 km²17.7% of basin
- 300.7 km²12.1% of basin
- 198.0 km²8.0% of basin
- 178.8 km²7.2% of basin
- 151.3 km²6.1% of basin
- 120.7 km²4.9% of basin
- 117.4 km²4.7% of basin
14 moreFull L2 list
- Ohaji/Egbema104.8 km² · 4.2%
- Ahiazu-Mbaise95.3 km² · 3.8%
- Omumma78.2 km² · 3.2%
- Owerri Municipal34.1 km² · 1.4%
- Nwangele30.9 km² · 1.2%
- Isu27.4 km² · 1.1%
- Ehime-Mbano27.0 km² · 1.1%
- Ezinihitte Mbaise20.0 km² · 0.8%
- Oguta16.4 km² · 0.7%
- Njaba6.5 km² · 0.3%
- Ikwerre5.3 km² · 0.2%
- Nkwerre3.7 km² · 0.1%
- Obowo3.4 km² · 0.1%
- Oyigbo1.4 km² · 0.1%
3 intersecting protected areas
Otamiri River
IUCN Not ReportedForest Reserve
94.55 km² overlap
Upper Imo River
IUCN Not ReportedForest Reserve
30.19 km² overlap
Otamiri
IUCN Not ReportedForest Reserve
1.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
234 distinct species · 822 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Otamiri River : 40 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 34 interactions GloBI sur 5 types (connectance 3.6%, filtre Serrano α=0.2). 4 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°
26,3°C
Annual rain
2 237mm
Moisture idx (CMI)
0,30
Runoff
1 512mm/an
PET
1 572mm
AET
1 208mm
Mean slope
0,6°
Water table
43cm
Forest
28%
Crops
53%
Urban
36%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)