HydroBASINS lev08 watershed · #2080481220
Bassin du Vernisson
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 1 administrative regions : Loiret
Sub-basin area
326,7km²
Upstream area
1 780,5km²
Discharge
12,51m³/s
Mean elev.
130m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Ouanne904 km²
- Bassin du Loing550 km²
1 dept-equivalent regions (GADM L2)
- 327.6 km²100.0% of basin
28 communes (GADM L5)Available for FRA, RWA
- Amilly35.66 km²87% commune
- Nogent-sur-Vernisson33.40 km²100% commune
- Les Choux33.02 km²97% commune
- Boismorand25.33 km²100% commune
- La Bussière24.94 km²71% commune
- Sainte-Geneviève-des-Bois22.52 km²55% commune
- Adon16.62 km²68% commune
- Varennes-Changy12.56 km²42% commune
- Pressigny-les-Pins11.84 km²100% commune
- Ouzouer-des-Champs10.97 km²100% commune
- Mormant-sur-Vernisson10.94 km²100% commune
- Cortrat10.93 km²100% commune
- Gien10.12 km²15% commune
- Solterre10.00 km²100% commune
- Saint-Hilaire-sur-Puiseaux8.19 km²75% commune
- Langesse7.77 km²89% commune
- Châlette-sur-Loing6.65 km²51% commune
- Montcresson6.37 km²31% commune
- Montbouy5.58 km²21% commune
- Conflans-sur-Loing5.09 km²55% commune
- Vimory4.15 km²16% commune
- Montargis4.05 km²100% commune
- Villemandeur3.81 km²34% commune
- Nevoy2.52 km²8% commune
- Paucourt2.34 km²11% commune
- Le Moulinet-sur-Solin2.04 km²11% commune
- La Selle-en-Hermoy0.22 km²1% commune
- Saint-Germain-des-Prés0.00 km²0% commune
2 intersecting protected areas
Land acquired by a regional conservatory of natural areas
0.24 km² overlap
Lande à genévriers de Nogent-sur-Vernisson
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 287 distinct species · 174 057 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 du Vernisson : 23 espèces reliées par 127 interactions GloBI sur 6 types (connectance 21.3%, filtre Serrano α=0.2). 12 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°
11,0°C
Annual rain
669mm
Moisture idx (CMI)
-0,22
Runoff
228mm/an
PET
861mm
AET
564mm
Mean slope
0,9°
Water table
47cm
Forest
21%
Crops
46%
Urban
8%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)