HydroBASINS lev08 watershed · #2080508960
Bassin du Ternin
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 : Côte-d'Or, Nièvre, Saône-et-Loire
Sub-basin area
268,6km²
Upstream area
268,6km²
Discharge
2,76m³/s
Mean elev.
485m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 115.9 km²43.0% of basin
- 88.3 km²32.8% of basin
- 65.1 km²24.2% of basin
25 communes (GADM L5)Available for FRA, RWA
- Alligny-en-Morvan40.27 km²82% commune
- Chissey-en-Morvan30.18 km²100% commune
- Moux-en-Morvan24.86 km²56% commune
- Lucenay-l'Évêque24.77 km²98% commune
- Sommant20.10 km²97% commune
- Tavernay19.57 km²77% commune
- Blanot18.23 km²99% commune
- Saint-Martin-de-la-Mer13.14 km²57% commune
- Ménessaire13.04 km²87% commune
- Champeau-en-Morvan12.37 km²35% commune
- Cussy-en-Morvan12.08 km²34% commune
- Brazey-en-Morvan10.98 km²65% commune
- Savilly6.95 km²84% commune
- Villiers-en-Morvan6.24 km²100% commune
- Autun3.69 km²6% commune
- Saulieu3.49 km²11% commune
- Saint-Forgeot3.22 km²21% commune
- Liernais1.93 km²7% commune
- Bard-le-Régulier1.91 km²20% commune
- Reclesne1.43 km²7% commune
- Barnay0.42 km²3% commune
- La Celle-en-Morvan0.37 km²2% commune
- La Petite-Verrière0.07 km²1% commune
- Manlay0.02 km²0% commune
- Saint-Didier0.00 km²0% commune
2 intersecting protected areas
Morvan
IUCN VRegional Nature Park
264.78 km² overlap
Special Areas of Conservation (Habitats Directive)
1.66 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 702 distinct species · 238 370 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 Ternin : 25 espèces reliées par 77 interactions GloBI sur 6 types (connectance 13.7%, filtre Serrano α=0.2). 9 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°
9,6°C
Annual rain
843mm
Moisture idx (CMI)
0,09
Runoff
323mm/an
PET
765mm
AET
607mm
Mean slope
6,6°
Water table
425cm
Forest
58%
Crops
3%
Urban
0%
Protected
97%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)