HydroBASINS lev08 watershed · #1080087180
Bassin de Oued Yellel
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 11 administrative regions : Ain Rahma, Belaassel Bouzagza, Bouguirat, El Bordj, El Matmar +6
Sub-basin area
368,2km²
Upstream area
368,2km²
Discharge
0,2m³/s
Mean elev.
272m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
11 dept-equivalent regions (GADM L2)
- 96.8 km²26.3% of basin
- 54.3 km²14.8% of basin
- Belaassel BouzagzaRelizane · Algeria51.4 km²14.0% of basin
- Sidi SaadaRelizane · Algeria41.3 km²11.2% of basin
- 30.7 km²8.3% of basin
- 25.2 km²6.8% of basin
- 24.8 km²6.7% of basin
- 21.2 km²5.8% of basin
3 moreFull L2 list
- Sedjerara9.1 km² · 2.5%
- Bouguirat7.1 km² · 1.9%
- El Menaouer6.1 km² · 1.7%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
37 distinct species · 121 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 Yellel : 14 espèces reliées par 11 interactions GloBI sur 4 types (connectance 9.2%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
17,5°C
Annual rain
397mm
Moisture idx (CMI)
-0,61
Runoff
18mm/an
PET
1 027mm
AET
342mm
Mean slope
4,1°
Water table
426cm
Forest
0%
Crops
66%
Urban
9%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)