HydroBASINS lev08 watershed · #1080092230
Bassin de Oued Isser
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 28 administrative regions : Aghlal, Ain Fezza, Ain Ghoraba, Ain Kihel, Ain Nehala +23
Sub-basin area
1 955km²
Upstream area
1 955km²
Discharge
1,64m³/s
Mean elev.
714m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
28 dept-equivalent regions (GADM L2)
- Sidi AbdelliTlemcen · Algeria231.2 km²11.8% of basin
- 202.0 km²10.3% of basin
- Beni SmielTlemcen · Algeria187.6 km²9.6% of basin
- Terny Beni HedielTlemcen · Algeria155.9 km²8.0% of basin
- Ain TalloutTlemcen · Algeria136.5 km²7.0% of basin
- Oued ChoulyTlemcen · Algeria134.0 km²6.9% of basin
- 128.0 km²6.5% of basin
- Ain NehalaTlemcen · Algeria124.5 km²6.4% of basin
20 moreFull L2 list
- El Fehoul92.6 km² · 4.7%
- Ouled Mimoun89.4 km² · 4.6%
- Bensekrane83.1 km² · 4.3%
- Ain Youcef53.3 km² · 2.7%
- Chetouane49.0 km² · 2.5%
- Aoubellil39.5 km² · 2.0%
- Tlemcen36.3 km² · 1.9%
- Remchi32.8 km² · 1.7%
- Hennaya32.3 km² · 1.7%
- Aghlal31.8 km² · 1.6%
- Sidi Dahou Zair30.9 km² · 1.6%
- Sebbaa Chioukh27.8 km² · 1.4%
- Ben Badis26.8 km² · 1.4%
- Ain Ghoraba16.1 km² · 0.8%
- Hassi Zehana6.0 km² · 0.3%
- Mansourah3.4 km² · 0.2%
- Sebdou1.7 km² · 0.1%
- Ain Kihel1.1 km² · 0.1%
- El Gor0.9 km² · 0.0%
- Moulay Slissen0.4 km² · 0.0%
3 intersecting protected areas
Tlemcen
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
381.99 km² overlap
Tlemcen
IUCN IINational Park
46.09 km² overlap
Grotte karstique de Ghar Boumâaza
IUCN Not ReportedWetland of International Importance (Ramsar Site)
3.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
577 distinct species · 1 082 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Isser : 31 espèces reliées par 70 interactions GloBI sur 5 types (connectance 7.1%, filtre Serrano α=0.2). 14 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°
15,6°C
Annual rain
496mm
Moisture idx (CMI)
-0,58
Runoff
26mm/an
PET
1 176mm
AET
422mm
Mean slope
7,1°
Water table
604cm
Forest
1%
Crops
55%
Urban
5%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)