HydroBASINS lev08 watershed · #1080084500
Bassin de Oued Boulhaf
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 21 administrative regions : Ain Tesra, Ain-Legradj, Beni Chebana, Beni-Ouartilane, Bir Kasdali +16
Sub-basin area
935,8km²
Upstream area
935,9km²
Discharge
3,46m³/s
Mean elev.
908m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
21 dept-equivalent regions (GADM L2)
- 114.9 km²12.3% of basin
- 107.3 km²11.5% of basin
- 86.9 km²9.3% of basin
- 83.0 km²8.9% of basin
- 60.0 km²6.4% of basin
- 55.2 km²5.9% of basin
- 50.1 km²5.4% of basin
- 49.4 km²5.3% of basin
13 moreFull L2 list
- Khelil49.4 km² · 5.3%
- Tesmart49.3 km² · 5.3%
- Tafreg41.7 km² · 4.5%
- Beni-Ouartilane37.7 km² · 4.0%
- Ain-Legradj37.0 km² · 3.9%
- Djaafra30.4 km² · 3.2%
- Harbil30.3 km² · 3.2%
- Bir Kasdali26.5 km² · 2.8%
- Teniet En Nasr12.6 km² · 1.3%
- Ain Tesra7.2 km² · 0.8%
- Bordj Bou Arreridj5.4 km² · 0.6%
- Tamokra1.8 km² · 0.2%
- Beni Chebana0.0 km² · 0.0%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
501 distinct species · 5 820 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Boulhaf : 20 espèces reliées par 60 interactions GloBI sur 4 types (connectance 13.8%, filtre Serrano α=0.2). 10 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°
14,3°C
Annual rain
522mm
Moisture idx (CMI)
-0,55
Runoff
124mm/an
PET
1 152mm
AET
443mm
Mean slope
10,0°
Water table
507cm
Forest
10%
Crops
35%
Urban
5%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)