HydroBASINS lev08 watershed · #2080568640
Bassin de Bras de la Barguelonne
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 3 administrative regions : Lot, Lot-et-Garonne, Tarn-et-Garonne
Sub-basin area
546,4km²
Upstream area
546,4km²
Discharge
4,75m³/s
Mean elev.
186m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 280.9 km²51.3% of basin
- 259.6 km²47.4% of basin
- 7.0 km²1.3% of basin
52 communes (GADM L5)Available for FRA, RWA
- Lauzerte30.71 km²69% commune
- Montcuq30.40 km²95% commune
- Castelnau-Montratier26.46 km²36% commune
- Cazes-Mondenard25.76 km²43% commune
- Montesquieu23.85 km²82% commune
- Pern22.78 km²90% commune
- Saint-Pantaléon19.25 km²100% commune
- Castelsagrat18.73 km²82% commune
- Durfort-Lacapelette18.42 km²52% commune
- Cézac17.49 km²100% commune
- Lascabanes17.32 km²100% commune
- Sauveterre16.73 km²98% commune
- Saint-Cyprien15.23 km²100% commune
- Saint-Nazaire-de-Valentane14.67 km²85% commune
- Saint-Amans-de-Pellagal14.66 km²100% commune
- Tréjouls13.55 km²100% commune
- Villesèque13.39 km²57% commune
- Gasques13.34 km²99% commune
- Labastide-Marnhac12.70 km²44% commune
- Saint-Paul-d'Espis12.15 km²46% commune
- Sainte-Alauzie11.97 km²100% commune
- Miramont-de-Quercy11.19 km²76% commune
- Lhospitalet11.18 km²74% commune
- Saint-Laurent-Lolmie11.02 km²100% commune
- Montagudet10.58 km²86% commune
- Saint-Daunès10.38 km²100% commune
- Lebreil10.12 km²97% commune
- Flaugnac9.83 km²31% commune
- Bagat-en-Quercy8.68 km²52% commune
- Bouloc8.49 km²60% commune
- Saint-Clair8.11 km²100% commune
- Sainte-Juliette7.66 km²100% commune
- Montbarla7.10 km²100% commune
- Moissac6.88 km²8% commune
- Montlauzun6.47 km²100% commune
- Clermont-Soubiran6.42 km²63% commune
- Valence4.48 km²33% commune
- Sainte-Croix4.22 km²55% commune
- Goudourville3.71 km²33% commune
- Saint-Vincent-Lespinasse3.48 km²37% commune
- Golfech3.39 km²35% commune
- Lamagistère2.17 km²23% commune
- Perville0.87 km²9% commune
- Grayssas0.60 km²7% commune
- Sauzet0.47 km²4% commune
- Valprionde0.13 km²1% commune
- Le Montat0.12 km²1% commune
- Brassac0.11 km²1% commune
- Vazerac0.09 km²0% commune
- Belmontet0.03 km²0% commune
- Montjoi0.00 km²0% commune
- Donzac0.00 km²0% commune
7 intersecting protected areas
Cavités et coteaux associés en Quercy-Gascogne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.68 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)
0.87 km² overlap
Land acquired by a regional conservatory of natural areas
0.10 km² overlap
Biotope Protection Order
0.05 km² overlap
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.05 km² overlap
Thézels
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
Thézels
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 672 distinct species · 62 835 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Bras de la Barguelonne : 28 espèces + 6 bulles famille, 71 interactions GloBI documentées sur 5 types (connectance 12.7%, 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°
12,4°C
Annual rain
786mm
Moisture idx (CMI)
-0,20
Runoff
278mm/an
PET
985mm
AET
659mm
Mean slope
4,9°
Water table
270cm
Forest
0%
Crops
95%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)