HydroBASINS lev08 watershed · #2080344900
Bassin de Shannon
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 4 administrative regions : Athlone, Athlone - Moate, Birr, Tullamore
Sub-basin area
523km²
Upstream area
4 966,5km²
Discharge
92,98m³/s
Mean elev.
54m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Inny1322 km²
- Bassin de Shannon577 km²
4 dept-equivalent regions (GADM L2)
- 237.3 km²45.2% of basin
- 219.1 km²41.7% of basin
- 65.6 km²12.5% of basin
- 3.2 km²0.6% of basin
18 intersecting protected areas
Lough Ree SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
30.01 km² overlap
Lough Ree SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
28.86 km² overlap
River Shannon Callows SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
23.87 km² overlap
Middle Shannon Callows SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
23.29 km² overlap
Carrickynaghtan Bog NHA
IUCN IVNatural Heritage Area
5.98 km² overlap
Lough Funshinagh SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.31 km² overlap
Carn Park Bog SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.47 km² overlap
Ballynamona Bog and Corkip Lough SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.35 km² overlap
Mongan Bog SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.07 km² overlap
9 more protected areassorted by overlap area
Crosswood Bog SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.04 km² overlap
Clonydonnin Bog NHA
IUCN IVNatural Heritage Area
1.38 km² overlap
Mongan Bog
IUCN IVWetland of International Importance (Ramsar Site)
1.29 km² overlap
Mongan Bog SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.29 km² overlap
Fin Lough (Offaly) SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.74 km² overlap
Pilgrim's Road Esker SAC
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.70 km² overlap
Castlesampson Esker SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.32 km² overlap
River Suck Callows SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.05 km² overlap
Suck River Callows NHA
IUCN IVNatural Heritage Area
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 021 distinct species · 18 834 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Shannon : 19 espèces reliées par 127 interactions GloBI sur 6 types (connectance 24.1%, filtre Serrano α=0.2). 14 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°
9,1°C
Annual rain
940mm
Moisture idx (CMI)
0,33
Runoff
532mm/an
PET
634mm
AET
541mm
Mean slope
0,9°
Water table
60cm
Forest
5%
Crops
7%
Urban
4%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)