HydroBASINS lev08 watershed · #2080569100
Bassin du Lemboulas
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 : Lot, Tarn-et-Garonne
Sub-basin area
661,3km²
Upstream area
15 585,7km²
Discharge
201,41m³/s
Mean elev.
158m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin du Tarn993 km²
- Bassin de Ruisseau de Merlet176 km²
2 dept-equivalent regions (GADM L2)
- 494.8 km²74.7% of basin
- 167.8 km²25.3% of basin
47 communes (GADM L5)Available for FRA, RWA
- Moissac76.90 km²90% commune
- Castelnau-Montratier47.64 km²64% commune
- Lafrançaise45.73 km²93% commune
- Montpezat-de-Quercy40.46 km²92% commune
- Molières38.86 km²100% commune
- Cazes-Mondenard33.49 km²57% commune
- Vazerac32.69 km²100% commune
- Lalbenque29.52 km²56% commune
- Puycornet27.18 km²100% commune
- Castelsarrasin24.66 km²32% commune
- Labarthe23.05 km²100% commune
- Flaugnac21.46 km²69% commune
- Saint-Paul-de-Loubressac20.14 km²100% commune
- La Ville-Dieu-du-Temple17.24 km²65% commune
- Durfort-Lacapelette17.22 km²48% commune
- Fontanes16.25 km²99% commune
- Belfort-du-Quercy15.40 km²43% commune
- Mirabel14.78 km²46% commune
- Montdoumerc13.91 km²100% commune
- Meauzac11.91 km²100% commune
- Labastide-du-Temple10.46 km²100% commune
- Lizac9.94 km²100% commune
- L'Honor-de-Cos8.63 km²27% commune
- Les Barthes8.59 km²100% commune
- Montfermier6.12 km²100% commune
- Barry-d'Islemade5.71 km²49% commune
- Montesquieu5.33 km²18% commune
- Lacourt-Saint-Pierre4.96 km²34% commune
- Saint-Paul-d'Espis4.39 km²17% commune
- Montalzat4.30 km²15% commune
- Montbeton4.12 km²26% commune
- Auty3.44 km²48% commune
- Saint-Vincent2.95 km²18% commune
- Pern2.60 km²10% commune
- Montech2.28 km²5% commune
- Labastide-de-Penne2.00 km²15% commune
- Boudou1.76 km²14% commune
- Piquecos1.59 km²20% commune
- Escatalens1.32 km²7% commune
- Saint-Porquier1.26 km²8% commune
- Montastruc0.56 km²12% commune
- Saint-Nicolas-de-la-Grave0.55 km²2% commune
- Cieurac0.49 km²3% commune
- Lhospitalet0.35 km²2% commune
- Sauveterre0.31 km²2% commune
- Belmont-Sainte-Foi0.08 km²1% commune
- Villemade0.06 km²1% commune
19 intersecting protected areas
Causses Du Quercy
IUCN VRegional Nature Park
45.44 km² overlap
Serres de Saint-Paul-de-Loubressac et de Saint-Barthélémy, et causse de Pech Tondut
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.65 km² overlap
Vallées du Tarn, de l'Aveyron, du Viaur, de l'Agout et du Gijou
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.29 km² overlap
Biotope Protection Order
2.43 km² overlap
Vallée de la Garonne de Muret à Moissac
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.43 km² overlap
Pelouses de Lalbenque
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.05 km² overlap
pelouses seches de pisseby
IUCN IVLand acquired by a regional conservatory of natural areas
0.12 km² overlap
Land acquired by a regional conservatory of natural areas
0.10 km² overlap
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.08 km² overlap
10 more protected areassorted by overlap area
prairies du diligent
IUCN IVLand acquired by a regional conservatory of natural areas
0.07 km² overlap
Land acquired by a regional conservatory of natural areas
0.06 km² overlap
moulin de monges
IUCN IVLand acquired by a regional conservatory of natural areas
0.04 km² overlap
Bois Du Calvaire
IUCN IVBiotope Protection Order
0.02 km² overlap
prairies du lemboulas
IUCN IVLand acquired by a regional conservatory of natural areas
0.02 km² overlap
prairies de gautie
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
prairie de la rouquette
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
bois garrels
IUCN IVLand acquired by a regional conservatory of natural areas
0.01 km² overlap
Serres de Labastide-de-Penne et de Belfort-du-Quercy
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.01 km² overlap
Land acquired by a regional conservatory of natural areas
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 280 distinct species · 114 777 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 du Lemboulas : 36 espèces + 6 bulles famille, 77 interactions GloBI documentées sur 5 types (connectance 8.9%, filtre Serrano α=0.2). Les 6 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°
12,6°C
Annual rain
764mm
Moisture idx (CMI)
-0,23
Runoff
264mm/an
PET
991mm
AET
644mm
Mean slope
3,6°
Water table
195cm
Forest
2%
Crops
90%
Urban
1%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)