HydroBASINS lev08 watershed · #1080088640
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 5 administrative regions : Bordj El Emir Abdelkader, Bouaiche, El Youssoufia, Layoune, Theniet El Had
Sub-basin area
279,5km²
Upstream area
1 784,2km²
Discharge
3,54m³/s
Mean elev.
934m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Oued Nahr-Ouassel1209 km²
- Bassin de Oued Nahr-Ouassel296 km²
5 dept-equivalent regions (GADM L2)
- 121.0 km²43.3% of basin
- Theniet El HadTissemsilt · Algeria88.0 km²31.5% of basin
- 34.2 km²12.2% of basin
- El YoussoufiaTissemsilt · Algeria32.3 km²11.6% of basin
- Bordj El Emir AbdelkaderTissemsilt · Algeria4.1 km²1.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
20 distinct species · 21 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 3 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 Nahr-Ouassel : 3 espèces reliées par 2 interactions GloBI sur 2 types (connectance 33.3%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
14,9°C
Annual rain
483mm
Moisture idx (CMI)
-0,57
Runoff
111mm/an
PET
1 118mm
AET
411mm
Mean slope
5,2°
Water table
388cm
Forest
0%
Crops
12%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)