HydroBASINS lev08 watershed · #2080520660
Bassin de la Reyssouze
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
500,7km²
Upstream area
500,7km²
Discharge
9,05m³/s
Mean elev.
225m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 502.0 km²100.0% of basin
53 communes (GADM L5)Available for FRA, RWA
- Viriat37.32 km²82% commune
- Saint-Jean-sur-Reyssouze27.30 km²100% commune
- Bourg-en-Bresse23.65 km²99% commune
- Foissiat22.08 km²54% commune
- Marsonnas18.55 km²100% commune
- Attignat18.03 km²96% commune
- Jayat16.23 km²100% commune
- Saint-Martin-du-Mont16.17 km²60% commune
- Certines15.34 km²98% commune
- Chevroux14.68 km²84% commune
- La Tranclière14.41 km²93% commune
- Saint-Étienne-sur-Reyssouze14.12 km²100% commune
- Montagnat13.98 km²100% commune
- Chavannes-sur-Reyssouze13.25 km²82% commune
- Saint-Martin-le-Châtel12.41 km²100% commune
- Cras-sur-Reyssouze11.84 km²86% commune
- Dommartin11.43 km²66% commune
- Béréziat11.30 km²100% commune
- Tossiat10.62 km²100% commune
- Mantenay-Montlin10.16 km²92% commune
- Montrevel-en-Bresse9.84 km²100% commune
- Saint-Didier-d'Aussiat9.83 km²63% commune
- Jasseron9.65 km²51% commune
- Malafretaz9.63 km²100% commune
- Péronnas9.46 km²51% commune
- Boissey9.29 km²100% commune
- Ceyzériat9.17 km²100% commune
- Étrez8.52 km²74% commune
- Druillat8.36 km²40% commune
- Saint-Trivier-de-Courtes7.94 km²47% commune
- Servignat7.73 km²100% commune
- Saint-Julien-sur-Reyssouze7.48 km²100% commune
- Gorrevod7.25 km²98% commune
- Pont-de-Vaux5.93 km²78% commune
- Revonnas5.84 km²76% commune
- Lescheroux5.79 km²28% commune
- Saint-Bénigne5.16 km²31% commune
- Saint-Sulpice5.01 km²100% commune
- Courtes4.19 km²47% commune
- Polliat4.09 km²20% commune
- Curtafond3.99 km²31% commune
- Reyssouze3.90 km²42% commune
- Saint-Just3.28 km²100% commune
- Journans2.10 km²100% commune
- Saint-Denis-lès-Bourg1.94 km²15% commune
- Lent1.14 km²4% commune
- Ramasse1.08 km²11% commune
- Boz0.67 km²9% commune
- Bohas-Meyriat-Rignat0.34 km²1% commune
- Dompierre-sur-Veyle0.17 km²1% commune
- Vescours0.17 km²1% commune
- Servas0.12 km²1% commune
- Bâgé-la-Ville0.04 km²0% commune
11 intersecting protected areas
La Dombes
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.72 km² overlap
La Dombes
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.72 km² overlap
La Dombes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.72 km² overlap
Prairies humides et forêts alluviales du Val de Saône
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.86 km² overlap
Val de Saône
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.86 km² overlap
Biotope Protection Order
0.81 km² overlap
Revermont et gorges de l'Ain
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.51 km² overlap
Land acquired by a regional conservatory of natural areas
0.05 km² overlap
Lande tourbeuse des Oignons
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.04 km² overlap
2 more protected areassorted by overlap area
marais de la chagne
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
bois de l\'etang vieux
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 914 distinct species · 269 688 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 la Reyssouze : 27 espèces reliées par 148 interactions GloBI sur 6 types (connectance 19.0%, filtre Serrano α=0.2). 13 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°
11,0°C
Annual rain
826mm
Moisture idx (CMI)
-0,07
Runoff
570mm/an
PET
888mm
AET
653mm
Mean slope
1,6°
Water table
74cm
Forest
15%
Crops
12%
Urban
5%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)