HydroBASINS lev08 watershed · #2080021240
Bassin du Scorff
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 : Côtes-d'Armor, Finistère, Morbihan
Sub-basin area
404,1km²
Upstream area
404,1km²
Discharge
9,73m³/s
Mean elev.
105m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 342.6 km²84.5% of basin
- 57.3 km²14.1% of basin
- 5.5 km²1.3% of basin
29 communes (GADM L5)Available for FRA, RWA
- Plouay62.20 km²91% commune
- Inguiniel26.33 km²51% commune
- Cléguer25.67 km²80% commune
- Pont-Scorff23.35 km²100% commune
- Arzano22.90 km²67% commune
- Langoëlan21.95 km²95% commune
- Persquen19.65 km²100% commune
- Locmalo18.95 km²78% commune
- Caudan18.58 km²43% commune
- Rédené18.52 km²74% commune
- Lignol18.46 km²48% commune
- Berné18.43 km²53% commune
- Ploërdut17.90 km²23% commune
- Guilligomarc'h15.86 km²68% commune
- Quéven15.08 km²61% commune
- Bubry11.74 km²17% commune
- Guidel10.48 km²20% commune
- Séglien6.65 km²17% commune
- Gestel5.99 km²100% commune
- Calan5.25 km²43% commune
- Lorient5.06 km²33% commune
- Mellionnec3.82 km²16% commune
- Meslan3.82 km²10% commune
- Lanester3.81 km²22% commune
- Lescouët-Gouarec1.64 km²9% commune
- Kernascléden1.27 km²14% commune
- Guern1.04 km²2% commune
- Guémené-sur-Scorff0.85 km²100% commune
- Silfiac0.04 km²0% commune
3 intersecting protected areas
Rivière Scorff, Forêt de Pont Calleck, Rivière Sarre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
20.57 km² overlap
Biotope Protection Order
1.36 km² overlap
Biotope Protection Order
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 351 distinct species · 349 335 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Scorff : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 118 interactions GloBI sur 6 types (connectance 15.9%, filtre Serrano α=0.2). 14 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
946mm
Moisture idx (CMI)
0,26
Runoff
755mm/an
PET
695mm
AET
554mm
Mean slope
2,6°
Water table
151cm
Forest
1%
Crops
54%
Urban
6%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)