HydroBASINS lev08 watershed · #2080574270
Bassin de fossé de drainage
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, Tarn-et-Garonne
Sub-basin area
17,4km²
Upstream area
12 353,6km²
Discharge
129,28m³/s
Mean elev.
127m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Hers-Mort1516 km²
- Bassin de la Garonne963 km²
2 dept-equivalent regions (GADM L2)
- 16.8 km²96.3% of basin
- 0.6 km²3.7% of basin
6 communes (GADM L5)Available for FRA, RWA
- Grenade5.29 km²14% commune
- Ondes4.19 km²63% commune
- Castelnau-d'Estrétefonds2.72 km²9% commune
- Merville2.53 km²8% commune
- Saint-Rustice2.09 km²91% commune
- Pompignan0.64 km²5% commune
3 intersecting protected areas
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.98 km² overlap
Biotope Protection Order
0.38 km² overlap
Vallée de la Garonne de Muret à Moissac
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.25 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 519 distinct species · 21 828 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 fossé de drainage : 38 espèces + 6 bulles famille, 90 interactions GloBI documentées sur 5 types (connectance 9.5%, 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°
12,8°C
Annual rain
706mm
Moisture idx (CMI)
-0,28
Runoff
218mm/an
PET
987mm
AET
598mm
Mean slope
1,2°
Water table
131cm
Forest
1%
Crops
77%
Urban
23%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)