HydroBASINS lev08 watershed · #2080460590
Bassin de l'Avre
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 3 administrative regions : Eure, Eure-et-Loir, Orne
Sub-basin area
944,4km²
Upstream area
944,5km²
Discharge
10,77m³/s
Mean elev.
187m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 456.1 km²48.1% of basin
- 350.9 km²37.0% of basin
- 140.3 km²14.8% of basin
103 communes (GADM L5)Available for FRA, RWA
- La Ferté-Vidame37.91 km²94% commune
- Boissy-lès-Perche33.81 km²100% commune
- Crucey-Villages30.88 km²69% commune
- Verneuil-sur-Avre30.66 km²96% commune
- La Madeleine-de-Nonancourt22.47 km²100% commune
- Moussonvilliers22.09 km²98% commune
- La Puisaye20.41 km²100% commune
- Marcilly-la-Campagne20.16 km²99% commune
- Piseux19.91 km²100% commune
- Rueil-la-Gadelière19.02 km²100% commune
- Dampierre-sur-Avre18.52 km²100% commune
- Beaulieu18.31 km²100% commune
- Droisy18.24 km²100% commune
- Buis-sur-Damville17.46 km²73% commune
- Tillières-sur-Avre16.95 km²100% commune
- Beauche16.48 km²100% commune
- Illiers-l'Évêque16.43 km²79% commune
- Saint-Maurice-lès-Charencey16.25 km²100% commune
- Laons15.44 km²96% commune
- Prudemanche15.36 km²100% commune
- Irai14.68 km²100% commune
- La Chapelle-Fortin14.50 km²100% commune
- La Saucelle14.33 km²100% commune
- Châtaincourt14.29 km²97% commune
- Brezolles14.23 km²100% commune
- Saint-Lubin-des-Joncherets14.19 km²100% commune
- Saint-Rémy-sur-Avre13.31 km²100% commune
- Bérou-la-Mulotière13.16 km²100% commune
- Fessanvilliers-Mattanvilliers12.25 km²100% commune
- Gournay-le-Guérin12.11 km²98% commune
- Pullay11.68 km²100% commune
- Randonnai11.30 km²100% commune
- Lamblore10.88 km²100% commune
- Saint-Christophe-sur-Avre10.65 km²100% commune
- Dreux10.05 km²42% commune
- Morvilliers10.04 km²100% commune
- Rohaire9.98 km²100% commune
- Vert-en-Drouais9.91 km²100% commune
- Les Châtelets9.89 km²100% commune
- Mandres9.82 km²84% commune
- Grandvilliers9.82 km²56% commune
- Senonches9.73 km²15% commune
- Les Barils9.61 km²100% commune
- Coudres9.43 km²59% commune
- Acon9.30 km²100% commune
- Muzy9.23 km²100% commune
- Courdemanche9.07 km²100% commune
- Escorpain9.05 km²100% commune
- La Poterie-au-Perche8.37 km²99% commune
- Les Ressuintes7.52 km²100% commune
- Montigny-sur-Avre7.41 km²100% commune
- Crulai7.28 km²32% commune
- Normandel7.23 km²100% commune
- Saint-Victor-sur-Avre7.18 km²100% commune
- Nonancourt7.13 km²100% commune
- Breux-sur-Avre7.04 km²100% commune
- L'Hosmes6.68 km²100% commune
- Armentières-sur-Avre6.57 km²100% commune
- Saint-Lubin-de-Cravant6.56 km²100% commune
- Marchainville6.38 km²30% commune
- Courteilles6.28 km²100% commune
- Boissy-en-Drouais6.13 km²100% commune
- Bresolettes5.91 km²100% commune
- La Mancelière5.77 km²100% commune
- Mesnil-sur-l'Estrée5.73 km²100% commune
- Revercourt5.67 km²100% commune
- Saint-Germain-sur-Avre5.47 km²100% commune
- Dame-Marie5.35 km²47% commune
- Louye5.15 km²100% commune
- Bourth4.59 km²25% commune
- L'Hôme-Chamondot4.40 km²27% commune
- Vitrai-sous-Laigle3.98 km²35% commune
- Louvilliers-en-Drouais3.89 km²100% commune
- Allainville3.60 km²65% commune
- Bâlines3.47 km²100% commune
- Moisville3.34 km²48% commune
- Bubertré3.25 km²23% commune
- Garancières-en-Drouais3.13 km²50% commune
- Chennebrun2.69 km²100% commune
- Saint-Ouen-d'Attez2.64 km²29% commune
- Louvilliers-lès-Perche2.48 km²16% commune
- Les Aspres2.46 km²11% commune
- Prépotin2.30 km²23% commune
- La Ventrouze2.26 km²34% commune
- Marcilly-sur-Eure1.98 km²13% commune
- Saulnières1.88 km²18% commune
- Chavigny-Bailleul1.81 km²10% commune
- Saint-Georges-Motel1.74 km²36% commune
- La Framboisière1.62 km²33% commune
- Chandai1.57 km²12% commune
- Corneuil1.48 km²13% commune
- Tourouvre1.21 km²5% commune
- Lignerolles0.99 km²17% commune
- Vernouillet0.89 km²7% commune
- Fontaine-les-Ribouts0.82 km²11% commune
- Soligny-la-Trappe0.75 km²4% commune
- Montreuil0.65 km²10% commune
- Cintray0.59 km²4% commune
- Saint-Ange-et-Torçay0.46 km²3% commune
- La Lande-sur-Eure0.29 km²2% commune
- Damville0.03 km²0% commune
- Sylvains-les-Moulins0.01 km²0% commune
- Les Genettes0.01 km²0% commune
11 intersecting protected areas
Forêts et étangs du Perche
IUCN Not ReportedSpecial Protection Area (Birds Directive)
113.23 km² overlap
Perche
IUCN VRegional Nature Park
83.99 km² overlap
Forets, etangs et tourbieres du Haut-Perche
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.59 km² overlap
Regional Nature Reserve
7.54 km² overlap
Arc forestier du Perche d'Eure-et-Loir
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.93 km² overlap
Les cavités de Tillières-sur-Avre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.98 km² overlap
Vallée de l'Eure de Maintenon à Anet et vallons affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.75 km² overlap
etang de la benette (l\')
IUCN IVLand acquired by a regional conservatory of natural areas
0.14 km² overlap
Etang De La Benette
IUCN IVBiotope Protection Order
0.14 km² overlap
2 more protected areassorted by overlap area
Vallée de l'Eure
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.06 km² overlap
les cavites de tillieres
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
3 571 distinct species · 185 954 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 l'Avre : 27 espèces reliées par 83 interactions GloBI sur 6 types (connectance 17.8%, filtre Serrano α=0.2). 4 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°
9,9°C
Annual rain
662mm
Moisture idx (CMI)
-0,16
Runoff
359mm/an
PET
787mm
AET
542mm
Mean slope
1,1°
Water table
66cm
Forest
2%
Crops
56%
Urban
2%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)