HydroBASINS lev08 watershed · #1080030700
Bassin de Oued El Harrach
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 36 administrative regions : Aissaouia, Baata, Baraki, Birtouta, Bordj El Kiffan +31
Sub-basin area
1 098km²
Upstream area
1 098km²
Discharge
7,24m³/s
Mean elev.
448m
Administrative coverage
36 dept-equivalent regions (GADM L2)
- Hammam MelouaneBlida · Algeria151.5 km²13.8% of basin
- 86.1 km²7.8% of basin
- 84.8 km²7.7% of basin
- Ouled SlamaBlida · Algeria70.9 km²6.5% of basin
- 68.9 km²6.3% of basin
- 50.0 km²4.6% of basin
- 46.9 km²4.3% of basin
- 46.6 km²4.2% of basin
28 moreFull L2 list
- Souhan44.8 km² · 4.1%
- Les Eucalyptus42.3 km² · 3.9%
- Sidi Moussa39.3 km² · 3.6%
- El Hamdania36.3 km² · 3.3%
- Chebli34.1 km² · 3.1%
- Aissaouia33.5 km² · 3.1%
- Djasr Kasentina27.0 km² · 2.5%
- Baraki26.8 km² · 2.4%
- Dar El Beida26.0 km² · 2.4%
- Birtouta24.0 km² · 2.2%
- Saoula20.9 km² · 1.9%
- El Achour17.8 km² · 1.6%
- Douera17.7 km² · 1.6%
- Kouba16.6 km² · 1.5%
- Khraicia14.6 km² · 1.3%
- Ouled Chebel13.6 km² · 1.2%
- Draria10.7 km² · 1.0%
- Bouinan9.8 km² · 0.9%
- Bordj El Kiffan7.6 km² · 0.7%
- Djebabra7.4 km² · 0.7%
- Deux Bassins7.4 km² · 0.7%
- Hammadi6.4 km² · 0.6%
- Cheraga3.5 km² · 0.3%
- Ouled Fayet2.6 km² · 0.2%
- Bouzareah0.9 km² · 0.1%
- Sidi Naamane0.4 km² · 0.0%
- Ouezra0.2 km² · 0.0%
- Khemis El Khechna0.2 km² · 0.0%
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 209 distinct species · 5 235 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 51 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 El Harrach : 41 espèces reliées par 106 interactions GloBI sur 5 types (connectance 8.0%, filtre Serrano α=0.2). 11 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°
16,1°C
Annual rain
716mm
Moisture idx (CMI)
-0,34
Runoff
177mm/an
PET
1 088mm
AET
587mm
Mean slope
10,7°
Water table
492cm
Forest
51%
Crops
39%
Urban
41%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)