HydroBASINS lev08 watershed · #1080089050
Bassin de Oued Nahr-Ouassel
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 3 administrative regions : Bouaiche, Hassi Fedoul, Layoune
Sub-basin area
254km²
Upstream area
2 247,5km²
Discharge
5,25m³/s
Mean elev.
777m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Oued Nahr-Ouassel280 km²
- Bassin · #1080088600209 km²
3 dept-equivalent regions (GADM L2)
- 239.7 km²94.4% of basin
- 14.2 km²5.6% of basin
- Hassi FedoulDjelfa · Algeria0.1 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 distinct species · 3 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
15,8°C
Annual rain
391mm
Moisture idx (CMI)
-0,66
Runoff
110mm/an
PET
1 158mm
AET
335mm
Mean slope
2,3°
Water table
332cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)