HydroBASINS lev08 watershed · #2080016470
Bassin de Fossé Meyrol
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 : Bouches-du-Rhône
Sub-basin area
585,1km²
Upstream area
585,1km²
Discharge
0,59m³/s
Mean elev.
34m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 568.8 km²97.0% of basin
15 communes (GADM L5)Available for FRA, RWA
- Saint-Martin-de-Crau134.86 km²62% commune
- Istres92.82 km²81% commune
- Fos-sur-Mer89.01 km²100% commune
- Arles70.24 km²9% commune
- Port-Saint-Louis-du-Rhône52.58 km²66% commune
- Eyguières49.30 km²73% commune
- Salon-de-Provence18.74 km²27% commune
- Miramas13.17 km²51% commune
- Aureille12.25 km²58% commune
- Saint-Mitre-les-Remparts10.86 km²52% commune
- Grans8.85 km²32% commune
- Port-de-Bouc8.41 km²69% commune
- Mouriès5.56 km²15% commune
- Martigues2.12 km²3% commune
- Eygalières0.05 km²0% commune
30 intersecting protected areas
Crau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
267.39 km² overlap
Crau centrale - Crau sèche
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
200.44 km² overlap
Alpilles
IUCN VRegional Nature Park
77.15 km² overlap
Camargue
IUCN VRegional Nature Park
74.24 km² overlap
Coussouls De Crau
IUCN IVNational Nature Reserve
72.78 km² overlap
Marais entre Crau et Grand Rhône
IUCN Not ReportedSpecial Protection Area (Birds Directive)
52.01 km² overlap
Marais de la vallée des Baux et marais d'Arles
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
44.58 km² overlap
Les Alpilles
IUCN Not ReportedSpecial Protection Area (Birds Directive)
31.67 km² overlap
Les Alpilles
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
24.79 km² overlap
21 more protected areassorted by overlap area
La crau
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
16.15 km² overlap
Le Rhône aval
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
15.23 km² overlap
Étangs entre Istres et Fos
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.21 km² overlap
Marais du vigueirat
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
10.20 km² overlap
Marais Du Vigueirat
IUCN IVNational Nature Reserve
9.31 km² overlap
Land acquired by a regional conservatory of natural areas
4.49 km² overlap
cossure
IUCN IVLand acquired by a regional conservatory of natural areas
3.59 km² overlap
Grands Paluds - Gonon
IUCN IVBiotope Protection Order
3.45 km² overlap
Citis pourra
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.23 km² overlap
Pourra – Domaine de Ranquet
IUCN IVRegional Nature Reserve
3.18 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
3.18 km² overlap
Camargue
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.61 km² overlap
Camargue
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.61 km² overlap
Poitevine-Regarde-Venir
IUCN IVRegional Nature Reserve
2.23 km² overlap
Land acquired by a regional conservatory of natural areas
1.38 km² overlap
cabanes neuves
IUCN IVLand acquired by a regional conservatory of natural areas
1.23 km² overlap
coussoul d\'ase
IUCN IVLand acquired by a regional conservatory of natural areas
0.65 km² overlap
Collines et salins de fos
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.27 km² overlap
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.01 km² overlap
Poste De Feuillane
IUCN IVBiotope Protection Order
0.01 km² overlap
Camargue
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 531 distinct species · 778 668 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Meyrol : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) + 4 bulles famille, 47 interactions GloBI documentées sur 2 types (connectance 10.1%, filtre Serrano α=0.2). Les 4 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°
13,9°C
Annual rain
622mm
Moisture idx (CMI)
-0,38
Runoff
195mm/an
PET
1 004mm
AET
527mm
Mean slope
0,8°
Water table
56cm
Forest
11%
Crops
28%
Urban
17%
Protected
39%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)