HydroBASINS lev08 watershed · #1080288970
Bassin de Oued Tirest
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 2 administrative regions : Bordj El Haouasse, Illizi
Sub-basin area
925,9km²
Upstream area
926,3km²
Discharge
0,06m³/s
Mean elev.
1 351m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Bordj El HaouasseIllizi · Algeria820.0 km²88.7% of basin
- 104.0 km²11.3% of basin
3 intersecting protected areas
Tassili N'Ajjer
IUCN Not ApplicableCultural Park
924.03 km² overlap
Tassili N'Ajjer
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
912.81 km² overlap
Tassili n'Ajjer
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
213.49 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 distinct species · 2 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°
21,6°C
Annual rain
34mm
Moisture idx (CMI)
-0,98
Runoff
6mm/an
PET
1 758mm
AET
26mm
Mean slope
2,4°
Water table
1 014cm
Forest
0%
Crops
0%
Urban
0%
Protected
99%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)