HydroBASINS lev08 watershed · #1080084330
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 21 administrative regions : Ain Ben Beida, Ain Larbi, Ain Sandel, Belkheir, Ben Djerrah +16
Sub-basin area
824,3km²
Upstream area
4 848,4km²
Discharge
13,43m³/s
Mean elev.
469m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Seybouse1108 km²
- Bassin de Cherf520 km²
21 dept-equivalent regions (GADM L2)
- 92.4 km²11.2% of basin
- 72.9 km²8.8% of basin
- Boumahra AhmedGuelma · Algeria72.3 km²8.8% of basin
- Hammam N'BailGuelma · Algeria71.9 km²8.7% of basin
- Bou HachanaGuelma · Algeria66.3 km²8.0% of basin
- Djebala El KhemissiGuelma · Algeria64.4 km²7.8% of basin
- Beni MezlineGuelma · Algeria49.8 km²6.0% of basin
- HelliopolisGuelma · Algeria45.1 km²5.5% of basin
13 moreFull L2 list
- Guelma44.4 km² · 5.4%
- El Fedjoudj42.3 km² · 5.1%
- Ben Djerrah37.3 km² · 4.5%
- Ain Larbi36.7 km² · 4.4%
- Bouchekouf31.4 km² · 3.8%
- Medjaz Ammar30.6 km² · 3.7%
- Ain Sandel27.4 km² · 3.3%
- Kalaat Bousbaa26.7 km² · 3.2%
- Hammam Debagh12.4 km² · 1.5%
- Nechemaya0.1 km² · 0.0%
- Oued Fragha0.0 km² · 0.0%
- Ain Ben Beida0.0 km² · 0.0%
- Roknia0.0 km² · 0.0%
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
145 distinct species · 326 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 48 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 : 38 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 5 types (connectance 7.5%, filtre Serrano α=0.2). 12 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°
16,0°C
Annual rain
601mm
Moisture idx (CMI)
-0,54
Runoff
141mm/an
PET
1 305mm
AET
508mm
Mean slope
8,5°
Water table
429cm
Forest
22%
Crops
72%
Urban
7%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)