HydroBASINS lev08 watershed · #2080569930
Bassin de l'Estampon
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 : Gers, Gironde, Landes
Sub-basin area
420,9km²
Upstream area
420,9km²
Discharge
5,26m³/s
Mean elev.
129m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 416.5 km²98.8% of basin
- 4.3 km²1.0% of basin
- 0.9 km²0.2% of basin
21 communes (GADM L5)Available for FRA, RWA
- Bourriot-Bergonce78.02 km²94% commune
- Losse76.06 km²74% commune
- Retjons71.00 km²91% commune
- Saint-Gor52.46 km²98% commune
- Vielle-Soubiran30.23 km²91% commune
- Estigarde29.23 km²100% commune
- Herré22.36 km²96% commune
- Arue17.83 km²36% commune
- Créon-d'Armagnac12.94 km²60% commune
- Gabarret8.06 km²49% commune
- Roquefort4.39 km²36% commune
- Cazaubon4.32 km²8% commune
- Lagrange3.69 km²17% commune
- Maillas2.94 km²5% commune
- Lencouacq2.88 km²3% commune
- Saint-Julien-d'Armagnac2.37 km²16% commune
- Captieux0.89 km²1% commune
- Sarbazan0.88 km²4% commune
- Parleboscq0.52 km²1% commune
- Saint-Justin0.36 km²1% commune
- Lubbon0.26 km²1% commune
4 intersecting protected areas
Landes De Gascogne
IUCN VRegional Nature Park
21.46 km² overlap
Réseau hydrographique des affluents de la Midouze
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.08 km² overlap
Étangs d'Armagnac
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.35 km² overlap
Champ de tir du Poteau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.35 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 615 distinct species · 34 066 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 l'Estampon : 26 espèces + 7 bulles famille, 65 interactions GloBI documentées sur 5 types (connectance 12.3%, 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
925mm
Moisture idx (CMI)
-0,07
Runoff
394mm/an
PET
991mm
AET
704mm
Mean slope
0,9°
Water table
111cm
Forest
96%
Crops
4%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)