HydroBASINS lev08 watershed · #2080458430
Bassin de l'Orne
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
7,7km²
Upstream area
1 492,5km²
Discharge
24,79m³/s
Mean elev.
126m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Orne1182 km²
- Bassin de la Rouvre303 km²
2 dept-equivalent regions (GADM L2)
- 4.1 km²53.8% of basin
- 3.6 km²46.2% of basin
3 communes (GADM L5)Available for FRA, RWA
- Ménil-Hubert-sur-Orne4.15 km²37% commune
- Pont-d'Ouilly2.86 km²14% commune
- Le Mesnil-Villement0.69 km²20% commune
1 intersecting protected areas
Vallée de l'Orne et ses affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
579 distinct species · 1 623 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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'Orne : 27 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 115 interactions GloBI sur 5 types (connectance 15.5%, 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°
10,3°C
Annual rain
725mm
Moisture idx (CMI)
-0,06
Runoff
608mm/an
PET
768mm
AET
553mm
Mean slope
5,3°
Water table
338cm
Forest
0%
Crops
24%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)