HydroBASINS lev08 watershed · #2080586030
Bassin de la Garonne
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 2 administrative regions : Haute-Garonne, Hautes-Pyrénées
Sub-basin area
38km²
Upstream area
1 265,4km²
Discharge
22,12m³/s
Mean elev.
576m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Ourse135 km²
- Bassin de la Garonne60 km²
2 dept-equivalent regions (GADM L2)
- 25.7 km²67.6% of basin
- 12.4 km²32.4% of basin
19 communes (GADM L5)Available for FRA, RWA
- Saint-Bertrand-de-Comminges11.61 km²98% commune
- Tibiran-Jaunac5.11 km²79% commune
- Barbazan5.02 km²86% commune
- Labroquère4.07 km²90% commune
- Sacoué3.15 km²24% commune
- Seilhan2.49 km²53% commune
- Loures-Barousse2.20 km²96% commune
- Valcabrère1.34 km²100% commune
- Gourdan-Polignan0.98 km²19% commune
- Aveux0.75 km²27% commune
- Sarp0.54 km²30% commune
- Izaourt0.41 km²16% commune
- Générest0.15 km²1% commune
- Luscan0.14 km²4% commune
- Gaudent0.06 km²5% commune
- Cier-de-Rivière0.06 km²1% commune
- Sauveterre-de-Comminges0.02 km²0% commune
- Huos0.00 km²0% commune
- Aventignan0.00 km²0% commune
3 intersecting protected areas
Chaînons calcaires du Piémont Commingeois
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.30 km² overlap
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.63 km² overlap
Biotope Protection Order
0.22 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 882 distinct species · 48 876 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Garonne : 25 espèces + 1 bulle famille, 27 interactions GloBI documentées sur 4 types (connectance 8.3%, filtre Serrano α=0.2). Les 1 bulle regroupe des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,8°C
Annual rain
869mm
Moisture idx (CMI)
-0,05
Runoff
412mm/an
PET
916mm
AET
701mm
Mean slope
10,2°
Water table
485cm
Forest
66%
Crops
4%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)