HydroBASINS lev08 watershed · #2080535490
Bassin du Séran
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 1 administrative regions : Ain
Sub-basin area
260,1km²
Upstream area
260,1km²
Discharge
6,49m³/s
Mean elev.
703m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 260.8 km²100.0% of basin
38 communes (GADM L5)Available for FRA, RWA
- Hotonnes26.78 km²93% commune
- Songieu19.86 km²96% commune
- Sutrieu19.70 km²100% commune
- Champagne-en-Valromey18.02 km²100% commune
- Virieu-le-Petit16.40 km²100% commune
- Ceyzérieu15.71 km²80% commune
- Belmont-Luthézieu15.37 km²80% commune
- Ruffieu13.95 km²100% commune
- Lompnieu10.67 km²97% commune
- Béon9.99 km²97% commune
- Brénaz9.16 km²91% commune
- Le Petit-Abergement9.02 km²33% commune
- Le Grand-Abergement8.07 km²25% commune
- Chavornay7.53 km²100% commune
- Lochieu6.94 km²100% commune
- Saint-Martin-de-Bavel6.91 km²78% commune
- Vieu6.86 km²100% commune
- Cressin-Rochefort6.42 km²82% commune
- Talissieu4.85 km²100% commune
- Pollieu3.67 km²100% commune
- Saint-Champ3.35 km²68% commune
- Artemare3.28 km²100% commune
- Flaxieu2.96 km²100% commune
- Lavours2.25 km²37% commune
- Thézillieu1.99 km²7% commune
- Vongnes1.89 km²89% commune
- Massignieu-de-Rives1.70 km²19% commune
- Marignieu1.47 km²40% commune
- Cormaranche-en-Bugey1.44 km²8% commune
- Culoz1.23 km²6% commune
- Anglefort0.92 km²3% commune
- Corbonod0.91 km²3% commune
- Injoux-Génissiat0.66 km²2% commune
- Champdor0.27 km²2% commune
- Hauteville-Lompnes0.26 km²1% commune
- Lhôpital0.14 km²4% commune
- Chanay0.12 km²1% commune
- Virieu-le-Grand0.05 km²0% commune
9 intersecting protected areas
Plateau du Retord et chaîne du Grand Colombier
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.04 km² overlap
Biotope Protection Order
3.90 km² overlap
Marais de Lavours
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.84 km² overlap
Marais de Lavours
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.84 km² overlap
Marais De Lavours
IUCN IVNational Nature Reserve
3.63 km² overlap
Forêts alluviales et lônes du Haut Rhône
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.74 km² overlap
Forêts alluviales et lônes du Haut Rhône
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.74 km² overlap
La Griffe Du Diable (De La)
IUCN IaForest Integral Biological Reserve
0.97 km² overlap
Arvière
IUCN IVBiotope Protection Order
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 435 distinct species · 130 266 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 du Séran : 39 espèces + 4 bulles famille, 106 interactions GloBI documentées sur 4 types (connectance 11.7%, filtre Serrano α=0.2). Les 4 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
8,7°C
Annual rain
1 078mm
Moisture idx (CMI)
0,21
Runoff
786mm/an
PET
823mm
AET
681mm
Mean slope
9,3°
Water table
246cm
Forest
54%
Crops
2%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)