Ontologia

HydroBASINS lev08 watershed · #1080949180

Bassin de Anambra

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 10 administrative regions : Ibaji, Igalamela-Odolu, Igbo-eze North, Igbo-eze South, Nsukka +5

Pfafstetter: 14210027

Sub-basin area

1 766,1km²

Upstream area

5 489,4km²

Discharge

129,32m³/s

Mean elev.

199m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Anambra6 km²

▲ Receives from 2 basins

10 dept-equivalent regions (GADM L2)

2 more

4 intersecting protected areas

  • Ibaji-Ojok

    IUCN Not Reported

    Forest Reserve

    217.45 km² overlap

  • Adoru

    IUCN Not Reported

    Forest Reserve

    201.01 km² overlap

  • Alla

    IUCN Not Reported

    Forest Reserve

    24.21 km² overlap

  • Okura River

    IUCN Not Reported

    Forest Reserve

    0.03 km² overlap

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

Species present

380 distinct species · 2 020 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 020 obs · 33 cellules
Obs. / cellule
≥ 664
109–663
80–108
20–79
< 20

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

Ecological tissue

Sample of 30 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 Anambra : 28 espèces reliées par 24 interactions GloBI sur 2 types (connectance 5.5%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
30
Interactions affichées
24
Connectance
0.055
Patrimoniales
0
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°

26,4°C

Annual rain

1 430mm

Moisture idx (CMI)

-0,14

Runoff

806mm/an

PET

1 668mm

AET

1 061mm

Mean slope

1,6°

Water table

113cm

Forest

78%

Crops

79%

Urban

7%

Protected

25%

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