HydroBASINS lev08 watershed · #2080337180
Bassin de Aille River
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 : Castlebar, Claremorris - Swinford, Westport - Belmullet
Sub-basin area
166,8km²
Upstream area
166,9km²
Discharge
6,34m³/s
Mean elev.
79m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 164.9 km²98.4% of basin
- 2.5 km²1.5% of basin
- 0.1 km²0.1% of basin
2 intersecting protected areas
Lough Carra/Mask Complex SAC
IUCN Not ReportedSite of Community Importance (Habitats Directive)
21.74 km² overlap
Lough Mask SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
16.62 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 066 distinct species · 4 675 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
9,1°C
Annual rain
1 195mm
Moisture idx (CMI)
0,50
Runoff
1 198mm/an
PET
593mm
AET
542mm
Mean slope
2,6°
Water table
79cm
Forest
5%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)