HydroBASINS lev08 watershed · #2080579650
Bassin de la Lèze
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 : Ariège, Haute-Garonne
Sub-basin area
374,1km²
Upstream area
374,1km²
Discharge
3,26m³/s
Mean elev.
308m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 259.0 km²69.1% of basin
- 115.7 km²30.9% of basin
55 communes (GADM L5)Available for FRA, RWA
- Lézat-sur-Lèze37.21 km²92% commune
- Artigat24.45 km²100% commune
- Saint-Ybars23.52 km²97% commune
- Beaumont-sur-Lèze21.51 km²82% commune
- Pailhès17.85 km²80% commune
- Carla-Bayle17.54 km²48% commune
- Le Fossat14.34 km²100% commune
- Saint-Sulpice-sur-Lèze14.30 km²100% commune
- Montaut12.62 km²70% commune
- Montégut-Plantaurel12.32 km²63% commune
- La Bastide-de-Sérou11.92 km²28% commune
- Saint-Martin-d'Oydes11.22 km²94% commune
- Sainte-Suzanne11.04 km²100% commune
- Durfort9.39 km²84% commune
- Lagardelle-sur-Lèze8.82 km²65% commune
- Eaunes8.42 km²55% commune
- Baulou8.28 km²55% commune
- Aigues-Juntes8.03 km²100% commune
- Esperce7.94 km²48% commune
- Castagnac7.78 km²73% commune
- Cazaux6.99 km²97% commune
- Vernet6.56 km²63% commune
- Villeneuve-du-Latou6.43 km²100% commune
- Sieuras6.13 km²84% commune
- Gabre5.30 km²40% commune
- Monesple5.25 km²89% commune
- Massabrac3.99 km²100% commune
- Montgazin3.87 km²57% commune
- Mauzac3.67 km²42% commune
- Lescousse3.58 km²41% commune
- Gaillac-Toulza3.48 km²9% commune
- Lanoux3.39 km²100% commune
- Canens3.20 km²66% commune
- Auribail3.05 km²34% commune
- Saint-Michel2.84 km²50% commune
- Esplas2.84 km²37% commune
- Loubens2.64 km²23% commune
- Saint-Martin-de-Caralp2.62 km²29% commune
- Labarthe-sur-Lèze2.42 km²24% commune
- Cadarcet2.06 km²18% commune
- Muret1.83 km²3% commune
- Castéras0.92 km²48% commune
- Le Fauga0.72 km²8% commune
- Lapeyrère0.67 km²11% commune
- Suzan0.45 km²19% commune
- Latrape0.37 km²2% commune
- Lagrâce-Dieu0.25 km²3% commune
- Artix0.22 km²3% commune
- Clermont-le-Fort0.19 km²2% commune
- Marliac0.09 km²1% commune
- Saint-Victor-Rouzaud0.09 km²1% commune
- Madière0.07 km²1% commune
- Sabarat0.05 km²1% commune
- Castex0.01 km²0% commune
- Méras0.00 km²0% commune
3 intersecting protected areas
Pyrénées Ariégeoises
IUCN VRegional Nature Park
77.90 km² overlap
pas du roc
IUCN IVLand acquired by a regional conservatory of natural areas
0.03 km² overlap
Confluence Garonne-Ariège
IUCN IVRegional Nature Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 446 distinct species · 56 827 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Lèze : 35 espèces + 7 bulles famille, 88 interactions GloBI documentées sur 5 types (connectance 10.2%, filtre Serrano α=0.2). Les 7 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°
12,3°C
Annual rain
746mm
Moisture idx (CMI)
-0,22
Runoff
275mm/an
PET
955mm
AET
631mm
Mean slope
5,5°
Water table
332cm
Forest
19%
Crops
67%
Urban
2%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)