HydroBASINS lev08 watershed · #2080319730
Bassin de Blackwater
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 across 2 countries : Armagh City, Banbridge and Craig, Ballybay - Clones, Carrickmacross - Castleblayney, Fermanagh and Omagh, Mid Ulster +1
Sub-basin area
1 560,9km²
Upstream area
1 560,9km²
Discharge
33,78m³/s
Mean elev.
93m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 674.3 km²43.0% of basin
- 504.9 km²32.2% of basin
- 348.7 km²22.2% of basin
- Ballybay - ClonesMonaghan · Ireland35.9 km²2.3% of basin
- 2.9 km²0.2% of basin
- Carrickmacross - CastleblayneyMonaghan · Ireland1.0 km²0.1% of basin
30 intersecting protected areas
Lough Neagh & Lough Beg
IUCN IVWetland of International Importance (Ramsar Site)
55.68 km² overlap
Lough Neagh
IUCN Not ReportedArea of Special Scientific Interest
27.69 km² overlap
Lough Neagh and Lough Beg
IUCN Not ReportedEmerald Network
27.67 km² overlap
Slieve Beagh SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
21.50 km² overlap
Slieve Beagh - Mullaghfad - Lisnaskea
IUCN Not ReportedEmerald Network
20.68 km² overlap
Slieve Beagh
IUCN Not ReportedEmerald Network
8.05 km² overlap
Slieve Beagh
IUCN Not ReportedArea of Special Scientific Interest
8.04 km² overlap
Slieve Beagh
IUCN Not ReportedWetland of International Importance (Ramsar Site)
8.03 km² overlap
Eshbrack Bog NHA
IUCN IVNatural Heritage Area
5.57 km² overlap
21 more protected areassorted by overlap area
Caledon and Tynan
IUCN Not ReportedArea of Special Scientific Interest
3.18 km² overlap
Peatlands Park
IUCN Not ReportedEmerald Network
2.07 km² overlap
Peatlands Park
IUCN Not ReportedArea of Special Scientific Interest
2.07 km² overlap
The Argory
IUCN VNature Reserve
1.09 km² overlap
Mullenakill & Annagarriff
IUCN Not ReportedNature Reserve
1.06 km² overlap
Straghans Lough
IUCN Not ReportedArea of Special Scientific Interest
0.49 km² overlap
Ardress House
IUCN VNature Reserve
0.33 km² overlap
Kiltubbrid Loughs
IUCN Not ReportedArea of Special Scientific Interest
0.24 km² overlap
Glenmore Wood
IUCN Not ReportedArea of Special Scientific Interest
0.14 km² overlap
Lough na blaney bane
IUCN Not ReportedArea of Special Scientific Interest
0.13 km² overlap
Crossbane Lough
IUCN Not ReportedArea of Special Scientific Interest
0.13 km² overlap
Roeveagh
IUCN Not ReportedArea of Special Scientific Interest
0.12 km² overlap
Drumcarn
IUCN Not ReportedArea of Special Scientific Interest
0.12 km² overlap
Benburb - Milltown
IUCN Not ReportedArea of Special Scientific Interest
0.11 km² overlap
Cloghcor Lough
IUCN Not ReportedArea of Special Scientific Interest
0.10 km² overlap
Fymore Lough
IUCN Not ReportedArea of Special Scientific Interest
0.09 km² overlap
Derrycloony Lough
IUCN Not ReportedArea of Special Scientific Interest
0.09 km² overlap
Rehaghy Wood
IUCN Not ReportedArea of Special Scientific Interest
0.08 km² overlap
Drumcrow
IUCN Not ReportedArea of Special Scientific Interest
0.08 km² overlap
Black Lough (Tyrone)
IUCN Not ReportedArea of Special Scientific Interest
0.06 km² overlap
Tullybrick Lough
IUCN Not ReportedArea of Special Scientific Interest
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 902 distinct species · 83 213 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Blackwater : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 6 types (connectance 9.2%, filtre Serrano α=0.2). 8 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°
8,6°C
Annual rain
951mm
Moisture idx (CMI)
0,37
Runoff
711mm/an
PET
593mm
AET
519mm
Mean slope
2,8°
Water table
106cm
Forest
2%
Crops
15%
Urban
3%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)