HydroBASINS lev08 watershed · #2080458420
Bassin du Noireau
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 : Calvados, Orne
Sub-basin area
523,8km²
Upstream area
523,8km²
Discharge
13,8m³/s
Mean elev.
204m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 268.1 km²51.0% of basin
- 257.3 km²49.0% of basin
70 communes (GADM L5)Available for FRA, RWA
- Vassy31.69 km²100% commune
- Tinchebray26.18 km²100% commune
- Flers20.97 km²97% commune
- Athis-de-l'Orne18.10 km²55% commune
- Le Plessis-Grimoult15.82 km²99% commune
- Bernières-le-Patry15.67 km²99% commune
- Caligny15.19 km²100% commune
- Saint-Jean-le-Blanc15.17 km²100% commune
- Saint-Germain-du-Crioult14.81 km²100% commune
- Cerisy-Belle-Étoile13.55 km²100% commune
- Frênes13.33 km²100% commune
- Proussy13.25 km²100% commune
- Lassy12.74 km²100% commune
- Condé-sur-Noireau12.06 km²100% commune
- Saint-Pierre-la-Vieille12.00 km²99% commune
- Montilly-sur-Noireau11.60 km²100% commune
- Saint-Denis-de-Méré11.45 km²100% commune
- Montsecret10.98 km²100% commune
- Danvou-la-Ferrière10.83 km²100% commune
- Landisacq10.73 km²100% commune
- Rully9.83 km²100% commune
- Saint-Vigor-des-Mézerets9.32 km²100% commune
- Saint-Quentin-les-Chardonnets9.32 km²100% commune
- Ondefontaine9.09 km²57% commune
- Saint-Pierre-du-Regard8.99 km²100% commune
- Chanu8.51 km²54% commune
- Saint-Paul8.30 km²100% commune
- Moncy7.59 km²100% commune
- Saint-Georges-des-Groseillers7.15 km²100% commune
- La Selle-la-Forge7.09 km²89% commune
- Truttemer-le-Grand7.09 km²47% commune
- Lénault6.78 km²100% commune
- La Chapelle-Biche6.27 km²98% commune
- La Lande-Patry6.26 km²100% commune
- Saint-Cornier-des-Landes6.18 km²52% commune
- Saint-Pierre-d'Entremont6.13 km²100% commune
- Le Mesnil-Auzouf6.10 km²65% commune
- Le Ménil-Ciboult6.05 km²98% commune
- Berjou5.88 km²68% commune
- Montchauvet5.67 km²30% commune
- Cahan5.51 km²95% commune
- Pont-d'Ouilly4.88 km²25% commune
- La Rocque4.57 km²98% commune
- La Chapelle-Engerbold4.12 km²100% commune
- Aubusson4.02 km²100% commune
- Yvrandes3.82 km²36% commune
- Sainte-Honorine-la-Chardonne3.72 km²25% commune
- Roucamps3.24 km²56% commune
- Pierres3.24 km²32% commune
- La Chapelle-au-Moine3.18 km²57% commune
- Clécy3.16 km²13% commune
- Messei3.15 km²24% commune
- Ménil-Hubert-sur-Orne3.08 km²28% commune
- Clairefougère3.03 km²100% commune
- Périgny2.87 km²100% commune
- La Bazoque2.47 km²100% commune
- Pontécoulant2.33 km²100% commune
- Viessoix1.96 km²15% commune
- Campandré-Valcongrain1.85 km²28% commune
- Truttemer-le-Petit1.72 km²29% commune
- La Villette1.31 km²14% commune
- Saint-Jean-des-Bois1.28 km²13% commune
- Cauville1.22 km²21% commune
- Estry0.87 km²8% commune
- Saint-Christophe-de-Chaulieu0.38 km²6% commune
- Le Theil-Bocage0.35 km²4% commune
- Saint-Lambert0.26 km²3% commune
- Saint-Clair-de-Halouze0.12 km²1% commune
- Montchamp0.01 km²0% commune
- Chênedollé0.00 km²0% commune
7 intersecting protected areas
Bassin de la Druance
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
56.36 km² overlap
Vallée de l'Orne et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.31 km² overlap
Rivière Le Noireau
IUCN IVBiotope Protection Order
0.53 km² overlap
Bassin de la Souleuvre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.19 km² overlap
La Rouvre Et Ses Affluents
IUCN IVBiotope Protection Order
0.07 km² overlap
La Vire et ses affluents
IUCN IVBiotope Protection Order
0.01 km² overlap
Rivière La Halouze
IUCN IVBiotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 567 distinct species · 62 850 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 Noireau : 21 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 4 types (connectance 15.0%, 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°
10,0°C
Annual rain
769mm
Moisture idx (CMI)
0,03
Runoff
706mm/an
PET
748mm
AET
559mm
Mean slope
3,2°
Water table
190cm
Forest
0%
Crops
18%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)