HydroBASINS lev08 watershed · #2080491020
Bassin du Don
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 5 administrative regions : Ille-et-Vilaine, Loire-Atlantique, Maine-et-Loire, Mayenne, Morbihan
Sub-basin area
2 420,8km²
Upstream area
5 675,8km²
Discharge
83,63m³/s
Mean elev.
59m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Seiche817 km²
- Bassin de la Vilaine26 km²
5 dept-equivalent regions (GADM L2)
- 1194.4 km²49.2% of basin
- 1189.0 km²49.0% of basin
- Mayenne22.2 km²0.9% of basin
- 22.2 km²0.9% of basin
- 0.0 km²0.0% of basin
115 communes (GADM L5)Available for FRA, RWA
- Guémené-Penfao105.12 km²99% commune
- Martigné-Ferchaud72.49 km²96% commune
- Bain-de-Bretagne66.07 km²100% commune
- Derval63.63 km²100% commune
- Erbray58.40 km²100% commune
- Rougé57.45 km²100% commune
- Grand-Fougeray55.78 km²100% commune
- Sion-les-Mines55.34 km²100% commune
- Guipry51.35 km²100% commune
- Moisdon-la-Rivière50.97 km²100% commune
- Nozay49.72 km²85% commune
- Avessac47.88 km²63% commune
- Saint-Aubin-des-Châteaux47.49 km²100% commune
- Messac42.11 km²100% commune
- Ercé-en-Lamée39.70 km²100% commune
- Soudan39.08 km²73% commune
- Guichen39.05 km²91% commune
- Issé38.79 km²100% commune
- Pipriac36.16 km²74% commune
- Lusanger36.07 km²100% commune
- Pléchâtel35.98 km²100% commune
- Langon35.90 km²100% commune
- Ruffigné34.08 km²100% commune
- Châteaubriant33.70 km²100% commune
- Guignen33.52 km²63% commune
- Saint-Vincent-des-Landes33.49 km²100% commune
- Jans33.48 km²100% commune
- Conquereuil32.89 km²100% commune
- La Dominelais32.19 km²100% commune
- Grand-Auverné31.19 km²89% commune
- Abbaretz30.84 km²50% commune
- La Chapelle-Glain30.25 km²88% commune
- Sainte-Anne-sur-Vilaine28.91 km²100% commune
- Saint-Just27.86 km²100% commune
- Pierric27.39 km²100% commune
- Teillay26.78 km²100% commune
- Maxent26.46 km²66% commune
- Renac25.98 km²100% commune
- Marsac-sur-Don25.89 km²94% commune
- Saint-Julien-de-Vouvantes25.54 km²100% commune
- Tresbœuf24.94 km²100% commune
- Sainte-Marie24.47 km²100% commune
- Thourie24.33 km²100% commune
- Coësmes23.96 km²100% commune
- Bourg-des-Comptes23.78 km²100% commune
- Baulon23.58 km²93% commune
- Laillé22.96 km²72% commune
- La Noë-Blanche22.91 km²100% commune
- Petit-Auverné22.90 km²99% commune
- Fercé21.25 km²100% commune
- Pancé19.60 km²100% commune
- Treffieux19.27 km²100% commune
- Louisfert18.60 km²100% commune
- Saint-Malo-de-Phily18.55 km²100% commune
- Saint-Senoux18.41 km²100% commune
- Massérac18.31 km²100% commune
- La Chapelle-de-Brain18.20 km²100% commune
- Eancé16.91 km²100% commune
- Lalleu15.61 km²100% commune
- La Meilleraye-de-Bretagne15.11 km²53% commune
- Saint-Ganton14.56 km²100% commune
- Saint-Nicolas-de-Redon13.35 km²60% commune
- SenonnesMayenne12.90 km²98% commune
- Goven12.70 km²32% commune
- La Couyère11.93 km²100% commune
- Villepot11.56 km²56% commune
- Chelun11.19 km²97% commune
- Soulvache11.18 km²100% commune
- Saint-Sulpice-des-Landes11.12 km²100% commune
- Plélan-le-Grand10.92 km²22% commune
- Le Pin10.89 km²43% commune
- La Bosse-de-Bretagne10.65 km²100% commune
- Mouais9.91 km²100% commune
- Saint-Michel-et-Chanveaux9.90 km²36% commune
- Rannée9.67 km²18% commune
- Lassy9.47 km²100% commune
- Poligné9.47 km²100% commune
- Sixt-sur-Aff8.73 km²20% commune
- Crevin8.57 km²100% commune
- Redon8.29 km²54% commune
- Bains-sur-Oust7.82 km²17% commune
- La Chapelle-Bouëxic7.67 km²37% commune
- Le Sel-de-Bretagne7.63 km²87% commune
- Noyal-sur-Brutz7.57 km²98% commune
- Sainte-Colombe7.45 km²99% commune
- Challain-la-Potherie7.01 km²14% commune
- Juigné-des-Moutiers6.70 km²26% commune
- Forges-la-Forêt6.38 km²100% commune
- Lohéac5.38 km²100% commune
- Bruc-sur-Aff5.35 km²26% commune
- Lieuron5.35 km²32% commune
- Retiers5.33 km²13% commune
- La RouaudièreMayenne5.20 km²27% commune
- Janzé4.99 km²12% commune
- Plessé4.59 km²4% commune
- Le Gâvre4.43 km²8% commune
- Pouancé4.40 km²9% commune
- Bruz3.50 km²12% commune
- Saulnières3.45 km²32% commune
- Bovel2.99 km²21% commune
- Vritz2.58 km²8% commune
- Le Theil-de-Bretagne2.50 km²10% commune
- Saint-ErblonMayenne2.40 km²44% commune
- Maure-de-Bretagne2.39 km²4% commune
- CongrierMayenne1.72 km²7% commune
- Chanteloup1.66 km²9% commune
- Orgères1.53 km²9% commune
- Saint-Sulpice-des-Landes1.29 km²4% commune
- Carbay0.87 km²11% commune
- Le Petit-Fougeray0.81 km²9% commune
- Vay0.72 km²2% commune
- Saint-Thurial0.28 km²2% commune
- Mernel0.16 km²1% commune
- Riaillé0.07 km²0% commune
- Saint-Jean-la-Poterie0.02 km²0% commune
26 intersecting protected areas
Marais de Vilaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
39.79 km² overlap
Forêt de Gâvre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.61 km² overlap
Vallée du Canut
IUCN Not ReportedSpecial Protection Area (Birds Directive)
4.27 km² overlap
Vallée du Canut
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.27 km² overlap
Biotope Protection Order
0.65 km² overlap
Les Landes de Cojoux et le Rocher de Tréal
IUCN Not ReportedGeotope Protection Order
0.62 km² overlap
Le Tertre Gris
IUCN Not ReportedGeotope Protection Order
0.11 km² overlap
La Galivelais
IUCN Not ReportedGeotope Protection Order
0.03 km² overlap
Biotope Protection Order
0.01 km² overlap
17 more protected areassorted by overlap area
La Roche de Timouy
IUCN Not ReportedGeotope Protection Order
0.01 km² overlap
La carrière du Vieux Four - la Fresnaie
IUCN Not ReportedGeotope Protection Order
0.01 km² overlap
Geotope Protection Order
0.01 km² overlap
La carrière du Pont Maillet
IUCN IVGeotope Protection Order
0.00 km² overlap
La carrière du Pont Maillet
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
La carrière du Haut-Duron
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
La carrière du Haut-Duron
IUCN IVGeotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Eglise De Guichen
IUCN IVBiotope Protection Order
0.00 km² overlap
La carrière de la Vallée
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
La carrière de la Vallée
IUCN IVGeotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 677 distinct species · 450 270 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Don : 27 espèces + 5 bulles famille, 72 interactions GloBI documentées sur 3 types (connectance 14.5%, filtre Serrano α=0.2). Les 5 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°
11,2°C
Annual rain
744mm
Moisture idx (CMI)
-0,09
Runoff
463mm/an
PET
814mm
AET
569mm
Mean slope
1,7°
Water table
142cm
Forest
1%
Crops
68%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)