HydroBASINS lev08 watershed · #2080481940
Bassin de l'Armance
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 2 administrative regions : Aube, Yonne
Sub-basin area
605,7km²
Upstream area
605,8km²
Discharge
4,21m³/s
Mean elev.
179m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 510.2 km²84.0% of basin
- 97.2 km²16.0% of basin
67 communes (GADM L5)Available for FRA, RWA
- Saint-Phal31.54 km²94% commune
- Chaource30.01 km²97% commune
- Vanlay26.46 km²100% commune
- Chessy-les-Prés25.84 km²100% commune
- Les Loges-Margueron25.78 km²80% commune
- Auxon25.01 km²98% commune
- Ervy-le-Châtel21.52 km²100% commune
- Cussangy21.51 km²100% commune
- Chesley20.96 km²100% commune
- Bernon17.85 km²100% commune
- Chamoy16.43 km²99% commune
- Coussegrey16.36 km²100% commune
- Étourvy14.86 km²93% commune
- Montigny-les-Monts14.55 km²100% commune
- Lagesse13.20 km²100% commune
- Neuvy-Sautour12.67 km²66% commune
- Vosnon11.94 km²94% commune
- Montfey11.51 km²100% commune
- Soumaintrain10.78 km²100% commune
- Avreuil10.14 km²100% commune
- Maraye-en-Othe10.12 km²24% commune
- Turgy9.89 km²100% commune
- Lignières9.70 km²37% commune
- Davrey9.43 km²100% commune
- Jeugny9.22 km²56% commune
- Quincerot9.21 km²99% commune
- Coursan-en-Othe9.13 km²100% commune
- Eaux-Puiseaux8.77 km²100% commune
- Sommeval8.68 km²90% commune
- Molosmes8.53 km²34% commune
- Courtaoult8.50 km²100% commune
- Vallières8.09 km²100% commune
- Racines7.66 km²100% commune
- Beugnon7.44 km²100% commune
- Germigny7.16 km²60% commune
- Flogny-la-Chapelle7.09 km²30% commune
- Les Croûtes7.07 km²99% commune
- Chaserey6.43 km²100% commune
- Lasson6.41 km²94% commune
- Mélisey5.89 km²26% commune
- Saint-Florentin5.82 km²20% commune
- Marolles-sous-Lignières5.51 km²37% commune
- La Loge-Pomblin5.23 km²100% commune
- Trichey5.17 km²81% commune
- Maisons-lès-Chaource4.49 km²79% commune
- Metz-Robert4.02 km²100% commune
- Sormery3.89 km²12% commune
- Prusy3.85 km²100% commune
- Villeneuve-au-Chemin3.77 km²100% commune
- Butteaux3.06 km²39% commune
- Rumilly-lès-Vaudes2.83 km²7% commune
- Lantages2.74 km²15% commune
- Rugny2.50 km²18% commune
- Balnot-la-Grange2.46 km²12% commune
- Les Granges1.63 km²100% commune
- Praslin1.48 km²13% commune
- Bouilly1.18 km²7% commune
- Javernant0.99 km²17% commune
- Villiers-le-Bois0.92 km²18% commune
- Arthonnay0.80 km²3% commune
- La Vendue-Mignot0.63 km²6% commune
- Percey0.46 km²5% commune
- Turny0.34 km²1% commune
- Fays-la-Chapelle0.31 km²59% commune
- Vauchassis0.02 km²0% commune
- Maupas0.01 km²0% commune
- Pargues0.01 km²0% commune
3 intersecting protected areas
Pelouses De Sommeval
IUCN IVBiotope Protection Order
0.08 km² overlap
pelouse de l\'echelle
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
prairie de la louvière
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
4 818 distinct species · 362 825 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 53 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'Armance : 18 espèces reliées par 212 interactions GloBI sur 5 types (connectance 10.5%, filtre Serrano α=0.2). 46 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
691mm
Moisture idx (CMI)
-0,19
Runoff
220mm/an
PET
849mm
AET
573mm
Mean slope
2,3°
Water table
168cm
Forest
21%
Crops
44%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)