HydroBASINS lev08 watershed · #1080004700
Bassin de Oued Welma
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 across 2 countries : Adailou, Dadda'to, Dorra, Moulhoule, Randa +1
Sub-basin area
1 842,5km²
Upstream area
1 842,5km²
Discharge
0m³/s
Mean elev.
495m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 398.3 km²21.7% of basin
- 392.5 km²21.4% of basin
- 362.4 km²19.7% of basin
- 345.5 km²18.8% of basin
- 200.0 km²10.9% of basin
- 136.7 km²7.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
44 distinct species · 72 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 7 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Oued Welma : 7 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 4 interactions GloBI sur 1 type (connectance 19.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
27,5°C
Annual rain
167mm
Moisture idx (CMI)
-0,90
Runoff
42mm/an
PET
1 652mm
AET
139mm
Mean slope
4,4°
Water table
954cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)