HydroBASINS lev08 watershed · #2080554160
Bassin de la Jalle
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 1 administrative regions : Gironde
Sub-basin area
367,4km²
Upstream area
367,4km²
Discharge
5,31m³/s
Mean elev.
43m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 368.2 km²100.0% of basin
20 communes (GADM L5)Available for FRA, RWA
- Saint-Jean-d'Illac117.45 km²97% commune
- Saint-Médard-en-Jalles85.26 km²100% commune
- Martignas-sur-Jalle26.08 km²100% commune
- Salaunes19.70 km²46% commune
- Saint-Aubin-de-Médoc14.53 km²42% commune
- Le Taillan-Médoc13.80 km²91% commune
- Mérignac13.36 km²28% commune
- Cestas11.72 km²12% commune
- Bruges9.80 km²71% commune
- Le Haillan9.66 km²100% commune
- Le Temple7.71 km²11% commune
- Eysines7.31 km²64% commune
- Bordeaux7.28 km²15% commune
- Pessac6.90 km²18% commune
- Lanton5.50 km²4% commune
- Blanquefort5.41 km²16% commune
- Audenge5.06 km²6% commune
- Marcheprime0.99 km²4% commune
- Sainte-Hélène0.73 km²1% commune
- Le Pian-Médoc0.02 km²0% commune
8 intersecting protected areas
Médoc
IUCN VRegional Nature Park
28.01 km² overlap
Landes De Gascogne
IUCN VRegional Nature Park
11.33 km² overlap
Réseau hydrographique des Jalles de Saint-Médard et d'Eysines
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.65 km² overlap
Marais de Bruges
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.35 km² overlap
Marais De Bruges
IUCN IVNational Nature Reserve
2.35 km² overlap
Marais de Bruges, Blanquefort et Parampuyre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.23 km² overlap
Protected perimeter around a national nature reserve
1.42 km² overlap
La Garonne en Nouvelle-Aquitaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 820 distinct species · 244 302 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 Jalle : 37 espèces + 5 bulles famille, 110 interactions GloBI documentées sur 5 types (connectance 12.8%, filtre Serrano α=0.2). Les 5 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
972mm
Moisture idx (CMI)
0,03
Runoff
472mm/an
PET
944mm
AET
687mm
Mean slope
0,4°
Water table
42cm
Forest
53%
Crops
9%
Urban
28%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)