Ontologia

HydroBASINS lev08 watershed · #1080962150

Bassin du Niger

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 6 administrative regions : Aniocha North, Esan North-East, Esan South-East, Igueben, Ika North-East +1

Pfafstetter: 14210040

Sub-basin area

1 298,5km²

Upstream area

1 298,6km²

Discharge

48,88m³/s

Mean elev.

176m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Niger643 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

6 dept-equivalent regions (GADM L2)

8 intersecting protected areas

  • Ologholo-Emu-Urho

    IUCN Not Reported

    Forest Reserve

    69.84 km² overlap

  • Okhuessan

    IUCN Not Reported

    Forest Reserve

    23.68 km² overlap

  • Udo

    IUCN Not Reported

    Forest Reserve

    20.45 km² overlap

  • Ubiaja

    IUCN Not Reported

    Forest Reserve

    12.79 km² overlap

  • Ogiopa

    IUCN Not Reported

    Forest Reserve

    11.39 km² overlap

  • Ewohimi

    IUCN Not Reported

    Forest Reserve

    6.16 km² overlap

  • Inyelen

    IUCN Not Reported

    Forest Reserve

    1.87 km² overlap

  • Akumazi

    IUCN Not Reported

    Forest Reserve

    1.60 km² overlap

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

Species present

242 distinct species · 849 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

849 obs · 25 cellules
Obs. / cellule
≥ 187
90–186
40–89
13–39
< 13

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

Ecological tissue

Sample of 12 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 du Niger : 10 espèces reliées par 9 interactions GloBI sur 3 types (connectance 13.6%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
12
Interactions affichées
9
Connectance
0.136
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°

26,2°C

Annual rain

1 697mm

Moisture idx (CMI)

0,04

Runoff

1 184mm/an

PET

1 622mm

AET

1 130mm

Mean slope

2,6°

Water table

161cm

Forest

39%

Crops

82%

Urban

6%

Protected

11%

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