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

Not enough documented interactions to build a meaningful graph for this territory.

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)