Ontologia

HydroBASINS lev08 watershed · #1080615530

Bassin · #1080615530

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 4 administrative regions across 2 countries : Ansongo, Ménaka, Ouallam, Tillabéry

Pfafstetter: 14273840

Sub-basin area

1 005,7km²

Upstream area

1 005,8km²

Discharge

0,53m³/s

Mean elev.

301m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin · #1080620580591 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

  • Ménaka
    Gao · Mali
    703.3 km²
    70.2% of basin
  • Tillabéry
    Tillabéry · Niger
    184.2 km²
    18.4% of basin
  • Ouallam
    Tillabéry · Niger
    113.3 km²
    11.3% of basin
  • Ansongo
    Gao · Mali
    1.3 km²
    0.1% of basin

1 intersecting protected areas

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

Species present

21 distinct species · 26 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

26 obs · 2 cellules
Obs. / cellule
≥ 25
25–24
25–24
25–24
< 25

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

Ecological tissue

Graphe en cours d’indexation

Calcul du tissu écologique de cette entité.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).

Hydroclimate (BasinATLAS lev08)

Mean T°

29,1°C

Annual rain

231mm

Moisture idx (CMI)

-0,89

Runoff

20mm/an

PET

2 112mm

AET

192mm

Mean slope

0,5°

Water table

267cm

Forest

0%

Crops

3%

Urban

0%

Protected

64%

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