HydroBASINS lev08 watershed · #2080487520
Bassin de la Braye
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 4 administrative regions : Eure-et-Loir, Loir-et-Cher, Orne, Sarthe
Sub-basin area
846,7km²
Upstream area
846,7km²
Discharge
5,59m³/s
Mean elev.
157m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 470.7 km²55.4% of basin
- 348.4 km²41.0% of basin
- 27.9 km²3.3% of basin
- 2.2 km²0.3% of basin
73 communes (GADM L5)Available for FRA, RWA
- Savigny-sur-Braye45.57 km²68% commune
- Vibraye41.66 km²94% commune
- Sargé-sur-Braye39.18 km²93% commune
- Choue37.09 km²100% commune
- Souday36.70 km²100% commune
- Conflans-sur-Anille30.31 km²99% commune
- Montaillé29.41 km²96% commune
- Valennes26.48 km²100% commune
- Melleray25.55 km²100% commune
- Saint-Calais22.83 km²100% commune
- Gréez-sur-Roc20.30 km²78% commune
- Écorpain20.24 km²97% commune
- Bessé-sur-Braye20.05 km²100% commune
- La Chapelle-Huon19.43 km²100% commune
- Baillou19.39 km²100% commune
- Berfay18.91 km²100% commune
- Boursay18.89 km²85% commune
- Rahay18.47 km²100% commune
- Saint-Gervais-de-Vic16.12 km²100% commune
- Saint-Agil15.90 km²100% commune
- Évaillé15.83 km²82% commune
- Sainte-Cérotte14.74 km²100% commune
- Cogners13.78 km²100% commune
- Le Plessis-Dorin13.25 km²95% commune
- La Chapelle-Vicomtesse13.20 km²86% commune
- Saint-Ulphace13.20 km²82% commune
- Vancé12.81 km²100% commune
- Saint-Bomer12.80 km²95% commune
- Montmirail12.40 km²100% commune
- Marolles-lès-Saint-Calais12.18 km²100% commune
- Le Gault-Perche11.88 km²42% commune
- Théligny11.24 km²77% commune
- Saint-Avit10.81 km²78% commune
- Bonneveau10.67 km²99% commune
- La Chapelle-Gaugain10.64 km²100% commune
- Oigny9.99 km²100% commune
- Arville9.86 km²100% commune
- Cellé9.72 km²78% commune
- Soizé9.39 km²51% commune
- Saint-Marc-du-Cor9.36 km²73% commune
- Lamnay9.10 km²41% commune
- Ruillé-sur-Loir8.97 km²22% commune
- Sougé7.69 km²44% commune
- La Fontenelle6.81 km²35% commune
- Cormenon5.85 km²100% commune
- Champrond5.50 km²100% commune
- Bouffry5.42 km²29% commune
- Mondoubleau4.79 km²100% commune
- Saint-Jean-des-Échelles4.38 km²42% commune
- Authon-du-Perche4.34 km²25% commune
- Lavenay3.74 km²53% commune
- Sainte-Osmane3.54 km²29% commune
- Lavaré2.64 km²12% commune
- Coudrecieux2.39 km²9% commune
- Ceton2.22 km²4% commune
- Chauvigny-du-Perche1.95 km²8% commune
- Le Temple1.88 km²14% commune
- Droué1.49 km²6% commune
- Chapelle-Guillaume1.01 km²5% commune
- Courgenard0.99 km²9% commune
- Troo0.98 km²7% commune
- Maisoncelles0.86 km²8% commune
- Semur-en-Vallon0.73 km²5% commune
- Saint-Georges-de-la-Couée0.51 km²4% commune
- Poncé-sur-le-Loir0.39 km²6% commune
- La Bazoche-Gouet0.20 km²1% commune
- Bouloire0.16 km²1% commune
- Arrou0.15 km²0% commune
- Tresson0.10 km²0% commune
- Saint-Maixent0.09 km²0% commune
- Romilly0.03 km²0% commune
- Les Étilleux0.03 km²0% commune
- Beauchêne0.03 km²0% commune
4 intersecting protected areas
Perche
IUCN VRegional Nature Park
29.96 km² overlap
Massif forestier de Vibraye
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.39 km² overlap
Cuesta cénomanienne du Perche d'Eure-et-Loir
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.03 km² overlap
marais de connival (le)
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 156 distinct species · 141 272 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Braye : 25 espèces + 6 bulles famille, 50 interactions GloBI documentées sur 5 types (connectance 10.8%, filtre Serrano α=0.2). Les 6 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°
10,6°C
Annual rain
676mm
Moisture idx (CMI)
-0,19
Runoff
215mm/an
PET
836mm
AET
563mm
Mean slope
2,2°
Water table
166cm
Forest
2%
Crops
57%
Urban
0%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)