Ontologia

HydroBASINS lev08 watershed · #1080863330

Bassin de Usuma

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 5 administrative regions : Abaji, Gurara, Gwagwalada, Kwali, Lapai

Pfafstetter: 14232070

Sub-basin area

1 031,7km²

Upstream area

7 249,5km²

Discharge

81,61m³/s

Mean elev.

230m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de River Gurara1305 km²

▲ Receives from 2 basins

5 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Tufa

    IUCN Not Reported

    Forest Reserve

    14.48 km² overlap

  • Bonu

    IUCN Not Reported

    Forest Reserve

    10.64 km² overlap

  • Maje Abuchi

    IUCN Not Reported

    Forest Reserve

    0.02 km² overlap

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

Species present

138 distinct species · 784 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

784 obs · 14 cellules
Obs. / cellule
≥ 186
171–185
83–170
28–82
< 28

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

Ecological tissue

Sample of 20 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 Usuma : 16 espèces reliées par 18 interactions GloBI sur 3 types (connectance 8.6%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
21
Interactions affichées
18
Connectance
0.086
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°

27,2°C

Annual rain

1 263mm

Moisture idx (CMI)

-0,32

Runoff

374mm/an

PET

1 845mm

AET

951mm

Mean slope

2,1°

Water table

146cm

Forest

6%

Crops

13%

Urban

2%

Protected

2%

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