HydroBASINS lev08 watershed · #2080584600
Bassin de la Noue
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 : Haute-Garonne
Sub-basin area
239,3km²
Upstream area
2 800,1km²
Discharge
41,27m³/s
Mean elev.
386m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin du Ger263 km²
- Bassin de Canal de la Gentille158 km²
1 dept-equivalent regions (GADM L2)
- 239.7 km²100.0% of basin
47 communes (GADM L5)Available for FRA, RWA
- Latoue15.85 km²87% commune
- Saint-Gaudens14.52 km²51% commune
- Saux-et-Pomarède12.54 km²100% commune
- Sepx12.23 km²100% commune
- Montespan11.84 km²91% commune
- Castillon-de-Saint-Martory10.95 km²100% commune
- Aulon9.43 km²63% commune
- Landorthe9.13 km²93% commune
- Lestelle-de-Saint-Martory8.90 km²100% commune
- Saint-Martory8.46 km²100% commune
- Labarthe-Inard7.75 km²79% commune
- Auzas7.75 km²100% commune
- Montsaunès7.72 km²87% commune
- Arnaud-Guilhem7.61 km²100% commune
- Aurignac7.01 km²39% commune
- Beauchalot6.80 km²100% commune
- Figarol6.78 km²56% commune
- Le Cuing5.69 km²43% commune
- Mancioux5.69 km²81% commune
- Lieoux5.52 km²100% commune
- Saint-Médard5.28 km²100% commune
- Cazeneuve-Montaut4.87 km²100% commune
- Proupiary4.84 km²100% commune
- Laffite-Toupière4.67 km²100% commune
- Saint-Ignan4.10 km²77% commune
- Bouzin4.01 km²100% commune
- Larcan3.60 km²53% commune
- Villeneuve-de-Rivière3.44 km²24% commune
- Mazères-sur-Salat2.89 km²43% commune
- Savarthès2.77 km²91% commune
- Alan2.73 km²24% commune
- Saint-Élix-Séglan2.60 km²93% commune
- Bordes-de-Rivière2.03 km²23% commune
- Le Fréchet1.70 km²36% commune
- Loudet1.39 km²28% commune
- Roquefort-sur-Garonne1.36 km²10% commune
- Pointis-Inard0.88 km²6% commune
- Saint-Marcet0.86 km²6% commune
- Peyrouzet0.83 km²16% commune
- Ganties0.82 km²7% commune
- Estancarbon0.47 km²8% commune
- Ponlat-Taillebourg0.46 km²5% commune
- Lodes0.43 km²3% commune
- Boussens0.29 km²7% commune
- Franquevielle0.12 km²1% commune
- Les Tourreilles0.07 km²1% commune
- Salies-du-Salat0.00 km²0% commune
3 intersecting protected areas
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.80 km² overlap
Biotope Protection Order
1.09 km² overlap
plane de la berriere
IUCN IVLand acquired by a regional conservatory of natural areas
0.61 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 361 distinct species · 58 961 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Noue : 38 espèces + 3 bulles famille, 76 interactions GloBI documentées sur 5 types (connectance 9.3%, filtre Serrano α=0.2). Les 3 bulles regroupent 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°
11,8°C
Annual rain
795mm
Moisture idx (CMI)
-0,16
Runoff
329mm/an
PET
951mm
AET
670mm
Mean slope
4,6°
Water table
291cm
Forest
31%
Crops
9%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)