HydroBASINS lev08 watershed · #2080021300
Bassin de l'Odet
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 : Finistère
Sub-basin area
718km²
Upstream area
718,1km²
Discharge
21,89m³/s
Mean elev.
105m
Administrative coverage
37 communes (GADM L5)Available for FRA, RWA
- Quimper87.48 km²100% commune
- Elliant70.22 km²100% commune
- Briec65.37 km²94% commune
- Plogonnec43.31 km²82% commune
- Ergué-Gabéric40.05 km²100% commune
- Pluguffan32.43 km²99% commune
- Coray29.54 km²93% commune
- Edern28.24 km²71% commune
- Plomelin28.08 km²100% commune
- Leuhan24.53 km²75% commune
- Cast24.35 km²65% commune
- Quéménéven23.58 km²83% commune
- Saint-Évarzec23.15 km²94% commune
- Landrévarzec20.51 km²100% commune
- Laz18.60 km²55% commune
- Langolen17.35 km²100% commune
- Trégourez17.22 km²100% commune
- Gouesnach17.13 km²100% commune
- Landudal16.76 km²100% commune
- Saint-Yvi16.36 km²59% commune
- Guengat13.25 km²57% commune
- Combrit10.93 km²41% commune
- Plonéis8.85 km²40% commune
- Pleuven8.65 km²62% commune
- Clohars-Fouesnant7.90 km²58% commune
- Saint-Goazec6.71 km²20% commune
- Tourch6.47 km²33% commune
- Rosporden4.73 km²8% commune
- Plogastel-Saint-Germain3.24 km²10% commune
- Plonéour-Lanvern1.84 km²4% commune
- Saint-Thois1.53 km²9% commune
- Tréméoc0.70 km²6% commune
- Bénodet0.67 km²6% commune
- Fouesnant0.25 km²1% commune
- Saint-Coulitz0.06 km²1% commune
- Locronan0.02 km²0% commune
- Melgven0.02 km²0% commune
13 intersecting protected areas
Baie De Kerogan
IUCN IVBiotope Protection Order
2.89 km² overlap
Rivières de Pont-l'Abbé et de l'Odet
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.75 km² overlap
Bois de roscoure
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.03 km² overlap
Site De Toulven
IUCN IVBiotope Protection Order
0.44 km² overlap
Complexe de l'est des montagnes noires
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.23 km² overlap
Armorique
IUCN VRegional Nature Park
0.09 km² overlap
Site De Stang Zu
IUCN IVBiotope Protection Order
0.09 km² overlap
Site De Kerogan
IUCN IVBiotope Protection Order
0.05 km² overlap
Beg ar vir
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.05 km² overlap
4 more protected areassorted by overlap area
Chemin De Halage De L\'Odet
IUCN IVBiotope Protection Order
0.04 km² overlap
Biotope Protection Order
0.00 km² overlap
Mine De Kerdevot
IUCN IVBiotope Protection Order
0.00 km² overlap
Biotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 967 distinct species · 117 224 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 de l'Odet : 21 espèces reliées par 120 interactions GloBI sur 6 types (connectance 19.0%, filtre Serrano α=0.2). 15 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
1 063mm
Moisture idx (CMI)
0,36
Runoff
895mm/an
PET
678mm
AET
565mm
Mean slope
3,0°
Water table
171cm
Forest
2%
Crops
41%
Urban
9%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)