HydroBASINS lev08 watershed · #2080561570
Bassin de la Colagne
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 : Lozère
Sub-basin area
462,1km²
Upstream area
462,1km²
Discharge
6,77m³/s
Mean elev.
1 075m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
32 communes (GADM L5)Available for FRA, RWA
- Rieutort-de-Randon59.72 km²96% commune
- Saint-Laurent-de-Muret34.79 km²76% commune
- Chirac34.04 km²100% commune
- Saint-Léger-de-Peyre26.54 km²100% commune
- Lachamp25.98 km²100% commune
- Le Buisson24.55 km²100% commune
- Prinsuéjols22.35 km²52% commune
- Ribennes22.27 km²89% commune
- Estables21.69 km²65% commune
- Montrodat21.13 km²100% commune
- Antrenas17.49 km²100% commune
- Gabrias16.89 km²82% commune
- Servières16.11 km²84% commune
- Arzenc-de-Randon14.78 km²21% commune
- Saint-Sauveur-de-Peyre14.76 km²52% commune
- Grèzes14.21 km²90% commune
- Marvejols12.45 km²100% commune
- Le Monastier-Pin-Moriès11.62 km²60% commune
- Les Salces11.56 km²25% commune
- Recoules-de-Fumas9.53 km²100% commune
- Palhers7.63 km²85% commune
- Chastel-Nouvel4.43 km²14% commune
- Saint-Amans4.16 km²41% commune
- Le Born3.94 km²13% commune
- Sainte-Colombe-de-Peyre3.28 km²15% commune
- Pelouse3.15 km²10% commune
- Saint-Gal2.15 km²22% commune
- Saint-Bonnet-de-Chirac1.16 km²16% commune
- Barjac0.52 km²2% commune
- Marchastel0.11 km²0% commune
- Javols0.11 km²0% commune
- Chanac0.03 km²0% commune
4 intersecting protected areas
Aubrac
IUCN VRegional Nature Park
200.94 km² overlap
Plateau de l'Aubrac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
36.14 km² overlap
Plateau de Charpal
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
25.43 km² overlap
Falaises de Barjac et causse des Blanquets
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.21 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 952 distinct species · 167 877 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Colagne : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 87 interactions GloBI sur 6 types (connectance 18.7%, 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°
7,9°C
Annual rain
818mm
Moisture idx (CMI)
0,00
Runoff
479mm/an
PET
813mm
AET
639mm
Mean slope
7,9°
Water table
420cm
Forest
65%
Crops
8%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)