HydroBASINS lev08 watershed · #2080048200
Bassin de Ruisseau d'Undala
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 : Corse-du-Sud
Sub-basin area
100,7km²
Upstream area
100,8km²
Discharge
1,35m³/s
Mean elev.
429m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 97.9 km²97.0% of basin
13 communes (GADM L5)Available for FRA, RWA
- Olmeto38.73 km²87% commune
- Fozzano15.43 km²79% commune
- Santa-Maria-Figaniella11.82 km²92% commune
- Petreto-Bicchisano10.43 km²27% commune
- Moca-Croce7.38 km²26% commune
- Viggianello6.43 km²38% commune
- Propriano3.24 km²17% commune
- Zérubia1.99 km²15% commune
- Casalabriva1.66 km²10% commune
- Arbellara0.76 km²7% commune
- Sollacaro0.02 km²0% commune
- Cargiaca0.01 km²0% commune
- Aullène0.00 km²0% commune
6 intersecting protected areas
Corse
IUCN VRegional Nature Park
19.97 km² overlap
Portigliolu
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.24 km² overlap
Embouchure Du Rizzanese
IUCN IVBiotope Protection Order
0.19 km² overlap
Baracci
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.19 km² overlap
Sites à Anchusa crispa de l'embouchure du Rizzanese et d'Olmeto
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.17 km² overlap
Embouchure du Taravo, plage de Tenutella et étang de Tanchiccia
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 343 distinct species · 8 357 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Ruisseau d'Undala : 29 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 104 interactions GloBI sur 5 types (connectance 13.3%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
13,5°C
Annual rain
672mm
Moisture idx (CMI)
-0,13
Runoff
415mm/an
PET
780mm
AET
515mm
Mean slope
15,3°
Water table
659cm
Forest
21%
Crops
2%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)