HydroBASINS lev08 watershed · #2080497260
Bassin du Nohain
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 : Cher, Nièvre, Yonne
Sub-basin area
539,4km²
Upstream area
539,4km²
Discharge
4,33m³/s
Mean elev.
230m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 488.7 km²90.3% of basin
- 52.2 km²9.7% of basin
- 0.0 km²0.0% of basin
37 communes (GADM L5)Available for FRA, RWA
- Donzy63.41 km²100% commune
- Entrains-sur-Nohain58.12 km²97% commune
- Suilly-la-Tour35.10 km²93% commune
- Bouhy32.55 km²89% commune
- Alligny-Cosne32.28 km²92% commune
- Ciez28.75 km²100% commune
- Sainte-Colombe-des-Bois26.21 km²87% commune
- Sainpuits23.07 km²100% commune
- Couloutre21.61 km²100% commune
- Perroy21.50 km²100% commune
- Saint-Martin-sur-Nohain21.10 km²86% commune
- Cosne-Cours-sur-Loire20.35 km²38% commune
- Pougny19.00 km²100% commune
- Colméry17.69 km²73% commune
- Cessy-les-Bois17.42 km²100% commune
- Saint-Père16.94 km²100% commune
- Menestreau16.13 km²82% commune
- Étais-la-Sauvin16.10 km²36% commune
- Saint-Quentin-sur-Nohain14.74 km²94% commune
- Saint-Andelain9.67 km²46% commune
- Lainsecq7.55 km²30% commune
- Treigny5.51 km²10% commune
- Menou4.19 km²25% commune
- Saint-Loup2.84 km²16% commune
- La Chapelle-Saint-André2.63 km²10% commune
- Châteauneuf-Val-de-Bargis1.94 km²4% commune
- Corvol-l'Orgueilleux1.24 km²4% commune
- Saint-Laurent-l'Abbaye1.05 km²100% commune
- Billy-sur-Oisy0.92 km²3% commune
- Saint-Malo-en-Donziois0.57 km²4% commune
- Dampierre-sous-Bouhy0.31 km²1% commune
- Vielmanay0.27 km²1% commune
- Bitry0.07 km²0% commune
- Saint-Vérain0.05 km²0% commune
- Tracy-sur-Loire0.02 km²0% commune
- Boulleret0.01 km²0% commune
- Garchy0.01 km²0% commune
3 intersecting protected areas
Gîtes et habitats à chauves-souris en Bourgogne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.35 km² overlap
Vallées de la Loire et de l'Allier entre Cher et Nièvre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.22 km² overlap
Vallées de la Loire et de l'Allier entre Cher et Nièvre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.22 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 173 distinct species · 202 701 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Nohain : 12 espèces reliées par 230 interactions GloBI sur 5 types (connectance 11.1%, filtre Serrano α=0.2). 53 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°
10,6°C
Annual rain
730mm
Moisture idx (CMI)
-0,15
Runoff
252mm/an
PET
857mm
AET
601mm
Mean slope
2,4°
Water table
165cm
Forest
6%
Crops
58%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)