HydroBASINS lev08 watershed · #2080021610
Bassin du Gouët
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 : Côtes-d'Armor
Sub-basin area
1 409,4km²
Upstream area
1 409,4km²
Discharge
5,85m³/s
Mean elev.
100m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 1364.3 km²96.5% of basin
97 communes (GADM L5)Available for FRA, RWA
- Lamballe78.53 km²100% commune
- Hénon42.03 km²100% commune
- Plédran34.63 km²100% commune
- Planguenoual33.50 km²100% commune
- Hénanbihen31.68 km²100% commune
- Quessoy30.52 km²100% commune
- Saint-Alban30.07 km²100% commune
- Hénansal29.69 km²100% commune
- Pordic29.03 km²100% commune
- Plouha28.78 km²69% commune
- Plouézec28.78 km²100% commune
- Plérin28.42 km²100% commune
- Erquy27.98 km²100% commune
- Plaintel27.71 km²100% commune
- Plélo27.64 km²62% commune
- Ploufragan27.44 km²100% commune
- Plestan26.42 km²79% commune
- Bréhand25.78 km²100% commune
- Hillion25.26 km²100% commune
- Trébry25.24 km²98% commune
- Saint-Brandan25.23 km²100% commune
- Plédéliac23.33 km²44% commune
- Le Fœil22.82 km²100% commune
- Plurien22.12 km²100% commune
- Paimpol21.55 km²80% commune
- Saint-Donan21.36 km²94% commune
- Fréhel19.86 km²100% commune
- Lanfains19.67 km²88% commune
- Saint-Cast-le-Guildo19.46 km²81% commune
- Saint-Brieuc19.06 km²100% commune
- Yffiniac17.48 km²100% commune
- Pléneuf-Val-André16.97 km²100% commune
- Le Vieux-Bourg16.69 km²66% commune
- Ploubazlanec16.47 km²100% commune
- Plourhan15.50 km²91% commune
- Plaine-Haute15.46 km²100% commune
- Plémy15.35 km²38% commune
- Trédaniel15.26 km²98% commune
- Plévenon14.98 km²100% commune
- Trégueux14.72 km²100% commune
- Meslin14.62 km²100% commune
- Pléboulle14.60 km²100% commune
- Matignon14.50 km²100% commune
- Saint-Carreuc13.35 km²100% commune
- Pommeret12.81 km²100% commune
- L'Hermitage-Lorge12.46 km²31% commune
- Andel12.02 km²100% commune
- Landéhen11.88 km²100% commune
- Ruca11.51 km²97% commune
- Plourivo11.50 km²40% commune
- La Bouillie10.92 km²100% commune
- Trégomeur10.57 km²100% commune
- Langueux10.00 km²100% commune
- Lantic9.82 km²61% commune
- Étables-sur-Mer9.62 km²100% commune
- Saint-Trimoël8.98 km²100% commune
- Plerneuf8.66 km²100% commune
- Saint-Bihy8.54 km²99% commune
- Coëtmieux8.18 km²100% commune
- Saint-Glen8.14 km²71% commune
- Saint-Denoual8.01 km²92% commune
- Morieux7.76 km²100% commune
- Quintenic7.32 km²100% commune
- Tréveneuc6.94 km²100% commune
- Noyal6.90 km²100% commune
- La Méaugon6.57 km²100% commune
- Île-de-Bréhat6.26 km²100% commune
- Saint-Rieul6.19 km²98% commune
- Trémuson6.17 km²100% commune
- Binic6.13 km²100% commune
- Plouvara5.71 km²25% commune
- Kerfot5.58 km²96% commune
- Saint-Julien5.55 km²100% commune
- La Malhoure4.96 km²100% commune
- Tréméloir4.80 km²100% commune
- Penguily4.52 km²42% commune
- Saint-Gildas4.42 km²28% commune
- Saint-Quay-Portrieux4.32 km²100% commune
- Saint-Pôtan3.03 km²15% commune
- Pléhédel2.82 km²22% commune
- Quintin2.53 km²100% commune
- Lanloup2.36 km²97% commune
- Yvias2.19 km²19% commune
- Plœuc-sur-Lié1.81 km²4% commune
- Le Haut-Corlay1.39 km²5% commune
- Le Leslay1.18 km²23% commune
- Plénée-Jugon1.06 km²2% commune
- La Harmoye1.03 km²6% commune
- Moncontour0.47 km²100% commune
- Cohiniac0.39 km²3% commune
- Tréguidel0.32 km²5% commune
- Pléguien0.23 km²1% commune
- Saint-Gouéno0.08 km²0% commune
- Lézardrieux0.07 km²0% commune
- Plessala0.06 km²0% commune
- Landébia0.03 km²1% commune
- Collinée0.00 km²0% commune
30 intersecting protected areas
Regional Nature Park
47.22 km² overlap
Tregor Goëlo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
35.58 km² overlap
Trégor Goëlo
IUCN Not ReportedMarine Protected Area (OSPAR)
35.57 km² overlap
Tregor Goëlo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
33.43 km² overlap
Trégor Goëlo
IUCN Not ReportedMarine Protected Area (OSPAR)
33.42 km² overlap
Cap d'Erquy-Cap Fréhel
IUCN Not ReportedSpecial Protection Area (Birds Directive)
29.43 km² overlap
Cap d'Erquy-Cap Fréhel
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
29.17 km² overlap
Baie de Saint-Brieuc - Est
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
18.09 km² overlap
Baie de Saint-Brieuc - Est
IUCN Not ReportedSpecial Protection Area (Birds Directive)
9.94 km² overlap
21 more protected areassorted by overlap area
Baie de Saint-Brieuc
IUCN Not ReportedMarine Protected Area (OSPAR)
5.13 km² overlap
Baie De Saint-Brieuc
IUCN IVNational Nature Reserve
5.12 km² overlap
Special Areas of Conservation (Habitats Directive)
5.07 km² overlap
Forêt de Lorge, landes de Lanfains, cime de Kerchouan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.76 km² overlap
Falaises du goelo
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
2.02 km² overlap
Cap d\'Erquy
IUCN IVBiotope Protection Order
1.73 km² overlap
Beauport - kerarzic
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.21 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1.08 km² overlap
Cote de penthievre
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.73 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.71 km² overlap
Baie de la fresnaye
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.61 km² overlap
Landes De La Poterie
IUCN IVBiotope Protection Order
0.60 km² overlap
Landes de la Poterie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.60 km² overlap
Baie de l\'arguenon
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.18 km² overlap
Grève des Nantois
IUCN Not ReportedGeotope Protection Order
0.16 km² overlap
Landes du cap frehel
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.16 km² overlap
Foret de penhoat-lancerf
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.12 km² overlap
Saint-ilan
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.11 km² overlap
La Pointe de la Heussaye
IUCN Not ReportedGeotope Protection Order
0.11 km² overlap
La Pointe de Guilben
IUCN Not ReportedGeotope Protection Order
0.10 km² overlap
Bréhec
IUCN Not ReportedGeotope Protection Order
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 525 distinct species · 180 863 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 Gouët : 28 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 5 types (connectance 11.3%, filtre Serrano α=0.2). 11 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
813mm
Moisture idx (CMI)
0,14
Runoff
605mm/an
PET
697mm
AET
534mm
Mean slope
2,2°
Water table
177cm
Forest
6%
Crops
68%
Urban
7%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)