HydroBASINS lev08 watershed · #1080086480
Bassin de Oued Rhiou
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 34 administrative regions : Ain Tarek, Ammari, Ammi Moussa, Boukadir, Dahmouni +29
Sub-basin area
2 452,1km²
Upstream area
2 452,1km²
Discharge
3,1m³/s
Mean elev.
620m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
34 dept-equivalent regions (GADM L2)
- Sidi HosniTiaret · Algeria230.4 km²9.4% of basin
- Oued LilliTiaret · Algeria225.8 km²9.2% of basin
- 177.7 km²7.2% of basin
- Ammi MoussaRelizane · Algeria174.3 km²7.1% of basin
- Had EchkallaRelizane · Algeria161.9 km²6.6% of basin
- 161.6 km²6.6% of basin
- Sidi Ali MellalTiaret · Algeria142.8 km²5.8% of basin
- El OueldjaRelizane · Algeria131.8 km²5.4% of basin
26 moreFull L2 list
- Melaab119.9 km² · 4.9%
- Meghila108.2 km² · 4.4%
- Tidda103.5 km² · 4.2%
- Dahmouni102.3 km² · 4.2%
- Ammari98.7 km² · 4.0%
- Sebt71.8 km² · 2.9%
- El Hassi57.5 km² · 2.3%
- Rahouia55.4 km² · 2.3%
- Sebaine53.1 km² · 2.2%
- Maacem43.3 km² · 1.8%
- Lahlef41.5 km² · 1.7%
- Oued Rhiou40.3 km² · 1.6%
- Mechraa Safa25.4 km² · 1.0%
- Souk El Had25.4 km² · 1.0%
- Tagdemt24.0 km² · 1.0%
- Sidi Lantri16.7 km² · 0.7%
- Ramka15.3 km² · 0.6%
- Mendes15.2 km² · 0.6%
- Ouled Yaich14.1 km² · 0.6%
- Tissemsilt5.1 km² · 0.2%
- Merdja Sidi Abed4.3 km² · 0.2%
- Tiaret4.1 km² · 0.2%
- Boukadir0.9 km² · 0.0%
- Ouled Ben Abdelkader0.3 km² · 0.0%
- Djidiouia0.0 km² · 0.0%
- Ouarizane0.0 km² · 0.0%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
140 distinct species · 348 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Rhiou : 33 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 7.0%, filtre Serrano α=0.2). 3 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
459mm
Moisture idx (CMI)
-0,57
Runoff
41mm/an
PET
1 074mm
AET
392mm
Mean slope
8,5°
Water table
598cm
Forest
2%
Crops
29%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)