HydroBASINS lev08 watershed · #2080465870
Bassin de la Voise
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 : Essonne, Eure-et-Loir, Yvelines
Sub-basin area
455,5km²
Upstream area
455,6km²
Discharge
2,77m³/s
Mean elev.
149m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 351.2 km²76.9% of basin
- 102.0 km²22.3% of basin
- 3.7 km²0.8% of basin
58 communes (GADM L5)Available for FRA, RWA
- Prunay-en-Yvelines26.24 km²98% commune
- Ablis22.55 km²85% commune
- Écrosnes22.37 km²93% commune
- Béville-le-Comte20.37 km²100% commune
- Aunay-sous-Auneau19.95 km²100% commune
- Sainville19.84 km²88% commune
- Francourville18.51 km²100% commune
- Auneau17.08 km²100% commune
- Ouarville14.25 km²71% commune
- Bailleau-Armenonville13.66 km²75% commune
- Saint-Léger-des-Aubées13.27 km²100% commune
- Denonville13.18 km²100% commune
- Gas11.84 km²100% commune
- Allainville11.44 km²68% commune
- Gallardon11.01 km²100% commune
- Sonchamp10.59 km²23% commune
- Oinville-sous-Auneau10.37 km²100% commune
- Voise10.30 km²100% commune
- Paray-Douaville10.04 km²100% commune
- Orsonville9.51 km²100% commune
- Maisons9.48 km²100% commune
- Santeuil9.30 km²100% commune
- Saint-Symphorien-le-Château9.30 km²100% commune
- Boinville-le-Gaillard9.14 km²72% commune
- Garancières-en-Beauce8.71 km²78% commune
- Prunay-le-Gillon8.58 km²33% commune
- Bleury7.94 km²100% commune
- La Chapelle-d'Aunainville7.50 km²100% commune
- Ymeray6.93 km²100% commune
- Le Gué-de-Longroi6.78 km²100% commune
- Roinville6.77 km²100% commune
- Houx6.55 km²99% commune
- Moinville-la-Jeulin6.15 km²100% commune
- Levainville5.81 km²100% commune
- Yermenonville4.62 km²93% commune
- Umpeau4.53 km²38% commune
- Mondonville-Saint-Jean4.05 km²72% commune
- Houville-la-Branche3.87 km²28% commune
- Morainville3.80 km²99% commune
- Léthuin3.38 km²50% commune
- Champseru3.17 km²21% commune
- Hanches2.41 km²15% commune
- Chatignonville2.20 km²41% commune
- Orphin1.60 km²10% commune
- Boisville-la-Saint-Père1.48 km²6% commune
- Mévoisins1.22 km²28% commune
- Sours1.21 km²4% commune
- Saint-Escobille1.18 km²10% commune
- Orcemont0.79 km²7% commune
- Épernon0.48 km²7% commune
- Maintenon0.39 km²3% commune
- Authon-la-Plaine0.37 km²4% commune
- Louville-la-Chenard0.35 km²2% commune
- Vierville0.21 km²3% commune
- Réclainville0.11 km²1% commune
- Émancé0.07 km²1% commune
- Saint-Piat0.05 km²0% commune
- Oysonville0.04 km²0% commune
5 intersecting protected areas
Beauce et vallée de la Conie
IUCN Not ReportedSpecial Protection Area (Birds Directive)
45.97 km² overlap
Regional Nature Park
10.69 km² overlap
Vallée de l'Eure de Maintenon à Anet et vallons affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.93 km² overlap
grands marais (les)
IUCN IVLand acquired by a regional conservatory of natural areas
0.11 km² overlap
pelouse de bonville (la)
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
2 156 distinct species · 131 754 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Voise : 26 espèces reliées par 100 interactions GloBI sur 5 types (connectance 15.0%, filtre Serrano α=0.2). 11 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°
10,4°C
Annual rain
638mm
Moisture idx (CMI)
-0,21
Runoff
193mm/an
PET
809mm
AET
538mm
Mean slope
0,6°
Water table
71cm
Forest
0%
Crops
63%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)