HydroBASINS lev08 watershed · #1080031080
Bassin de Seybouse
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 18 administrative regions : Ain Ben Beida, Ain El Berda, Beni Mezline, Besbes, Bouchekouf +13
Sub-basin area
930,8km²
Upstream area
6 333,1km²
Discharge
18,02m³/s
Mean elev.
171m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Seybouse824 km²
- Bassin de Oued Mellah554 km²
18 dept-equivalent regions (GADM L2)
- Ain Ben BeidaGuelma · Algeria130.9 km²14.1% of basin
- Ain El BerdaAnnaba · Algeria120.5 km²12.9% of basin
- 120.5 km²12.9% of basin
- BouchekoufGuelma · Algeria88.0 km²9.5% of basin
- Oued FraghaGuelma · Algeria79.7 km²8.6% of basin
- 64.2 km²6.9% of basin
- 63.1 km²6.8% of basin
- 48.5 km²5.2% of basin
10 moreFull L2 list
- Chorfa46.6 km² · 5.0%
- Chebaita Mokhtar41.8 km² · 4.5%
- Sidi Amar39.4 km² · 4.2%
- Besbes29.8 km² · 3.2%
- El Bouni21.6 km² · 2.3%
- Beni Mezline13.6 km² · 1.5%
- Medjaz Sfa10.1 km² · 1.1%
- Echatt8.7 km² · 0.9%
- Kalaat Bousbaa2.5 km² · 0.3%
- Djebala El Khemissi1.5 km² · 0.2%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
343 distinct species · 783 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Seybouse : 35 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 82 interactions GloBI sur 5 types (connectance 8.7%, filtre Serrano α=0.2). 9 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°
17,5°C
Annual rain
678mm
Moisture idx (CMI)
-0,45
Runoff
193mm/an
PET
1 241mm
AET
572mm
Mean slope
5,2°
Water table
306cm
Forest
52%
Crops
51%
Urban
11%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)