Ontologia

HydroBASINS lev08 watershed · #1081024380

Bassin de Orashi 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 11 administrative regions : Abua/Odual, Ahoada East, Ahoada West, Brass, Ogba/Egbema/Ndoni +6

Pfafstetter: 14100083

Sub-basin area

1 835,1km²

Upstream area

4 219,4km²

Discharge

192,92m³/s

Mean elev.

24m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sego Creek211 km²

▲ Receives from 2 basins

11 dept-equivalent regions (GADM L2)

3 more

4 intersecting protected areas

  • Upper Orashi Forests

    IUCN VI

    Wetland of International Importance (Ramsar Site)

    163.75 km² overlap

  • Taylor Creek

    IUCN Not Reported

    Forest Reserve

    115.24 km² overlap

  • Upper Orashi River

    IUCN Not Reported

    Forest Reserve

    72.75 km² overlap

  • Ohaji

    IUCN Not Reported

    Forest Reserve

    11.07 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

650 distinct species · 2 243 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 243 obs · 36 cellules
Obs. / cellule
≥ 321
209–320
48–208
22–47
< 22

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 31 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Orashi River : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 33 interactions GloBI sur 2 types (connectance 5.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
33
Connectance
0.056
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

26,7°C

Annual rain

2 438mm

Moisture idx (CMI)

0,35

Runoff

1 533mm/an

PET

1 570mm

AET

1 249mm

Mean slope

0,5°

Water table

14cm

Forest

83%

Crops

27%

Urban

15%

Protected

11%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)