HydroBASINS lev08 watershed · #2080487690
Bassin de la Claie
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 : Morbihan
Sub-basin area
353km²
Upstream area
353km²
Discharge
6,66m³/s
Mean elev.
96m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
27 communes (GADM L5)Available for FRA, RWA
- Plumelec53.95 km²93% commune
- Saint-Jean-Brévelay41.61 km²99% commune
- Bignan40.31 km²88% commune
- Sérent37.52 km²62% commune
- Pleucadeuc33.07 km²96% commune
- Saint-Guyomard19.27 km²98% commune
- Colpo17.19 km²65% commune
- Trédion16.00 km²62% commune
- Saint-Allouestre15.15 km²91% commune
- Saint-Congard9.58 km²43% commune
- Molac8.78 km²30% commune
- Bohal8.34 km²100% commune
- Plaudren6.86 km²17% commune
- Pluherlin6.65 km²19% commune
- Moréac6.17 km²10% commune
- Saint-Marcel6.17 km²48% commune
- Buléon5.61 km²45% commune
- Guéhenno5.38 km²23% commune
- Moustoir-Ac4.26 km²13% commune
- Lizio4.12 km²24% commune
- Billio3.57 km²30% commune
- Cruguel2.01 km²12% commune
- Malestroit0.98 km²17% commune
- Le Cours0.77 km²5% commune
- Radenac0.43 km²2% commune
- Locqueltas0.20 km²1% commune
- Saint-Martin-sur-Oust0.09 km²0% commune
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 521 distinct species · 28 008 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 la Claie : 28 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 3 types (connectance 11.8%, 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°
11,1°C
Annual rain
843mm
Moisture idx (CMI)
0,13
Runoff
601mm/an
PET
736mm
AET
560mm
Mean slope
2,3°
Water table
210cm
Forest
3%
Crops
62%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)