HydroBASINS lev08 watershed · #2080470920
Bassin de l'Orvanne
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 : Loiret, Seine-et-Marne, Yonne
Sub-basin area
779,3km²
Upstream area
4 149,1km²
Discharge
28,27m³/s
Mean elev.
119m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin du Fusain503 km²
- Bassin du Betz218 km²
3 dept-equivalent regions (GADM L2)
- 588.4 km²75.3% of basin
- 192.8 km²24.7% of basin
- 0.5 km²0.1% of basin
87 communes (GADM L5)Available for FRA, RWA
- Poligny27.64 km²100% commune
- Larchant25.01 km²87% commune
- Chevry-en-Sereine22.77 km²100% commune
- Saint-Valérien22.57 km²100% commune
- Saint-Pierre-lès-Nemours22.13 km²100% commune
- Villethierry20.86 km²100% commune
- Blennes20.41 km²100% commune
- Lorrez-le-Bocage-Préaux19.70 km²100% commune
- Souppes-sur-Loing19.32 km²71% commune
- Villemer18.86 km²100% commune
- Fontainebleau18.15 km²10% commune
- Montacher-Villegardin16.82 km²59% commune
- Thoury-Férottes16.53 km²100% commune
- Dollot15.55 km²100% commune
- Villebéon15.35 km²96% commune
- Villemaréchal14.84 km²100% commune
- Bougligny14.73 km²90% commune
- Fouchères14.51 km²100% commune
- Treuzy-Levelay13.85 km²100% commune
- La Genevraye13.32 km²100% commune
- Dormelles13.20 km²99% commune
- Nanteau-sur-Lunain13.06 km²100% commune
- Grez-sur-Loing12.91 km²100% commune
- Villeneuve-la-Dondagre12.88 km²87% commune
- Villiers-sous-Grez12.27 km²100% commune
- Lixy12.23 km²100% commune
- Voulx12.06 km²99% commune
- Vallery12.00 km²100% commune
- Nonville11.52 km²100% commune
- Bourron-Marlotte11.29 km²100% commune
- Villecerf11.06 km²100% commune
- Brannay10.97 km²100% commune
- Remauville10.51 km²100% commune
- Nemours10.03 km²100% commune
- Chéroy9.88 km²92% commune
- Chevrainvilliers9.46 km²100% commune
- Écuelles9.33 km²80% commune
- Paley9.17 km²100% commune
- Chaintreaux8.93 km²37% commune
- Montigny-sur-Loing8.90 km²99% commune
- Vaux-sur-Lunain8.78 km²100% commune
- Recloses8.77 km²92% commune
- Montcourt-Fromonville8.65 km²100% commune
- Faÿ-lès-Nemours8.17 km²100% commune
- La Belliole8.05 km²98% commune
- Darvault7.97 km²100% commune
- Diant7.88 km²67% commune
- Égreville7.84 km²24% commune
- Aufferville7.47 km²42% commune
- Saint-Sérotin7.21 km²50% commune
- Épisy7.20 km²100% commune
- Flagy7.02 km²99% commune
- Villebougis6.45 km²56% commune
- La Madeleine-sur-Loing6.31 km²100% commune
- Courtoin5.42 km²94% commune
- Moret-sur-Loing5.36 km²100% commune
- Bagneaux-sur-Loing5.24 km²100% commune
- Garentreville5.05 km²79% commune
- Châtenoy4.83 km²100% commune
- Guercheville4.49 km²48% commune
- Montarlot4.12 km²83% commune
- Champigny3.96 km²19% commune
- Ville-Saint-Jacques3.78 km²36% commune
- Ormesson3.59 km²100% commune
- La Chapelle-la-Reine3.15 km²19% commune
- Saint-Ange-le-Viel3.04 km²100% commune
- Château-Landon2.72 km²9% commune
- Égriselles-le-Bocage2.68 km²11% commune
- Villeroy2.48 km²35% commune
- Domats2.13 km²9% commune
- Burcy1.96 km²29% commune
- Chaumont1.73 km²20% commune
- Esmans1.69 km²10% commune
- Vernoy1.64 km²11% commune
- Maisoncelles-en-Gâtinais1.63 km²19% commune
- Jouy1.57 km²9% commune
- Obsonville1.53 km²22% commune
- Veneux-les-Sablons1.35 km²36% commune
- Montmachoux1.00 km²23% commune
- Noisy-Rudignon0.84 km²19% commune
- Saint-Agnan0.72 km²5% commune
- Villemanoche0.47 km²3% commune
- Dordives0.45 km²3% commune
- Saint-Mammès0.36 km²17% commune
- Chenou0.17 km²1% commune
- Fromont0.11 km²1% commune
- Subligny0.02 km²0% commune
29 intersecting protected areas
Gâtinais Français
IUCN VRegional Nature Park
78.73 km² overlap
Massif de Fontainebleau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
65.10 km² overlap
Massif de Fontainebleau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
65.07 km² overlap
Rivières du Loing et du Lunain
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.00 km² overlap
Vallée Jauberton
IUCN IaForest Integral Biological Reserve
2.40 km² overlap
Plaine De Sorques
IUCN IVBiotope Protection Order
1.31 km² overlap
Marais De Larchant
IUCN IVRegional Nature Reserve
1.24 km² overlap
Basse vallée du Loing
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.76 km² overlap
Land acquired by a regional conservatory of natural areas
0.55 km² overlap
20 more protected areassorted by overlap area
sabliere de cercanceaux (la)
IUCN IVLand acquired by a regional conservatory of natural areas
0.46 km² overlap
Marais D\'Episy
IUCN IVBiotope Protection Order
0.41 km² overlap
vieille ecluse
IUCN IVLand acquired by a regional conservatory of natural areas
0.34 km² overlap
Sites à chiroptères de Darvault, Mocpoix et Saint-Nicolas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.31 km² overlap
Bois Des Belles Vues
IUCN IVBiotope Protection Order
0.24 km² overlap
Biotope Protection Order
0.16 km² overlap
Biotope Protection Order
0.10 km² overlap
vallee du cygne
IUCN IVLand acquired by a regional conservatory of natural areas
0.06 km² overlap
bois de montrichard
IUCN IVLand acquired by a regional conservatory of natural areas
0.05 km² overlap
marais de montigny
IUCN IVLand acquired by a regional conservatory of natural areas
0.03 km² overlap
vallee de l orvanne
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
bois de recloses
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
montagne creuse
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
Aqueduc De La Vanne
IUCN IVBiotope Protection Order
0.00 km² overlap
carriere du puiselet
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
commanderie
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
orpheline1
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
orpheline5
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
orpheline2
IUCN IVLand acquired by a regional conservatory of natural areas
0.00 km² overlap
marais du lutin
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
7 395 distinct species · 552 968 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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'Orvanne : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 147 interactions GloBI sur 6 types (connectance 17.9%, 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°
10,8°C
Annual rain
653mm
Moisture idx (CMI)
-0,23
Runoff
204mm/an
PET
849mm
AET
550mm
Mean slope
1,6°
Water table
142cm
Forest
10%
Crops
56%
Urban
4%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)