HydroBASINS lev08 watershed · #2080339950
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 6 administrative regions : Athlone, Athlone - Moate, Ballymahon, Boyle, Longford +1
Sub-basin area
576,9km²
Upstream area
3 121,7km²
Discharge
69,39m³/s
Mean elev.
54m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Camlin267 km²
- Bassin de Shannon27 km²
6 dept-equivalent regions (GADM L2)
- 205.2 km²35.4% of basin
- BallymahonLongford · Ireland188.2 km²32.5% of basin
- 112.4 km²19.4% of basin
- 52.4 km²9.1% of basin
- 20.4 km²3.5% of basin
- 0.6 km²0.1% of basin
9 intersecting protected areas
Lough Ree SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
83.54 km² overlap
Lough Ree SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
66.69 km² overlap
Ballykenny-Fisherstown Bog SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.75 km² overlap
Lough Forbes Complex SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.74 km² overlap
Corbo Bog SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.03 km² overlap
Lisnanarriagh Bog NHA
IUCN IVNatural Heritage Area
1.09 km² overlap
Mount Jessop Bog NHA
IUCN IVNatural Heritage Area
0.63 km² overlap
Fortwilliam Turlough SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.51 km² overlap
Mount Jessop Bog SAC
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 659 distinct species · 15 090 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 : 23 espèces reliées par 93 interactions GloBI sur 6 types (connectance 15.6%, filtre Serrano α=0.2). 12 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°
9,0°C
Annual rain
1 001mm
Moisture idx (CMI)
0,38
Runoff
584mm/an
PET
623mm
AET
543mm
Mean slope
1,1°
Water table
58cm
Forest
8%
Crops
7%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)