HydroBASINS lev08 watershed · #1080030310
Bassin de Oued Tafna
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 10 administrative regions : Ain Tolba, Beni Khellad, Beni Ouarsous, Beni Saf, Emir Abdelkader +5
Sub-basin area
353,2km²
Upstream area
7 265,2km²
Discharge
6,2m³/s
Mean elev.
186m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 3 basins
- Bassin de Oued Isser1955 km²
- Bassin de Oued Tafna987 km²
- Bassin · #1080056160546 km²
10 dept-equivalent regions (GADM L2)
- 64.3 km²18.2% of basin
- 53.9 km²15.3% of basin
- 47.1 km²13.3% of basin
- Sebbaa ChioukhTlemcen · Algeria46.8 km²13.3% of basin
- Emir Abdelkader45.3 km²12.8% of basin
- Beni OuarsousTlemcen · Algeria30.3 km²8.6% of basin
- Beni KhelladTlemcen · Algeria22.5 km²6.4% of basin
- 17.5 km²5.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
74 distinct species · 93 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 Tafna : 16 espèces reliées par 9 interactions GloBI sur 2 types (connectance 7.5%, 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°
17,6°C
Annual rain
439mm
Moisture idx (CMI)
-0,61
Runoff
24mm/an
PET
1 128mm
AET
376mm
Mean slope
7,1°
Water table
606cm
Forest
0%
Crops
77%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)