HydroBASINS lev08 watershed · #2080049880
Bassin de River Neath
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 : NA, Powys, Rhondda Cynon Taf
Sub-basin area
313,3km²
Upstream area
313,4km²
Discharge
10,96m³/s
Mean elev.
261m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- NA184.0 km²58.5% of basin
- Powys102.3 km²32.5% of basin
- 27.3 km²8.7% of basin
- NA0.7 km²0.2% of basin
29 intersecting protected areas
Bannau Brycheiniog
IUCN VNational Park
109.16 km² overlap
Ogof Ffynnon Ddu-Pant Mawr
IUCN IVSite of Special Scientific Interest
7.91 km² overlap
Site of Special Scientific Interest
4.21 km² overlap
Coedydd Nedd a Mellte
IUCN Not ReportedEmerald Network
3.79 km² overlap
Blaen Nedd
IUCN IVSite of Special Scientific Interest
1.88 km² overlap
Ogof Ffynnon Ddu
IUCN IVSite of Special Scientific Interest
1.14 km² overlap
Craig-Y-Llyn
IUCN IVSite of Special Scientific Interest
1.07 km² overlap
Ogof Ffynnon Ddu
IUCN IVNational Nature Reserve
0.84 km² overlap
Berthlwyd Farm
IUCN VNature Reserve
0.62 km² overlap
20 more protected areassorted by overlap area
Gorsllwyn, Onllwyn
IUCN IVSite of Special Scientific Interest
0.39 km² overlap
Site of Special Scientific Interest
0.36 km² overlap
Gweunydd Dyffryn Nedd
IUCN IVSite of Special Scientific Interest
0.32 km² overlap
Blaen Cynon
IUCN Not ReportedEmerald Network
0.28 km² overlap
Cors Bryn - Y - Gaer
IUCN IVSite of Special Scientific Interest
0.26 km² overlap
Plas-Y-Gors
IUCN IVSite of Special Scientific Interest
0.13 km² overlap
Bryn-Bwch
IUCN IVSite of Special Scientific Interest
0.10 km² overlap
Fforest Goch Bog
IUCN IVSite of Special Scientific Interest
0.10 km² overlap
Eaglesbush Valley
IUCN Not ReportedLocal Nature Reserve
0.08 km² overlap
Caeau Nant Y Llechau
IUCN IVSite of Special Scientific Interest
0.08 km² overlap
Caeau Ton-Y-Fildre
IUCN IVSite of Special Scientific Interest
0.08 km² overlap
Site of Special Scientific Interest
0.07 km² overlap
Nant Y Rhos
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
Woodland Park And Pontpren
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Crymlyn Burrows
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Pant-Y-Sais
IUCN Not ReportedLocal Nature Reserve
0.02 km² overlap
Pant-Y-Sais
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Crymlyn Bog/ Cors Crymlyn
IUCN Not ReportedEmerald Network
0.02 km² overlap
Crymlyn Bog
IUCN IVWetland of International Importance (Ramsar Site)
0.02 km² overlap
Crymlyn Bog And Pant Y Sais
IUCN IVNational Nature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 176 distinct species · 309 980 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 River Neath : 24 espèces reliées par 87 interactions GloBI sur 6 types (connectance 14.6%, 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°
8,9°C
Annual rain
1 340mm
Moisture idx (CMI)
0,55
Runoff
1 058mm/an
PET
599mm
AET
554mm
Mean slope
6,9°
Water table
287cm
Forest
11%
Crops
6%
Urban
10%
Protected
36%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)