HydroBASINS lev08 watershed · #2080372620
Bassin de River Wye
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 2 administrative regions : Ceredigion, Powys
Sub-basin area
435,6km²
Upstream area
435,8km²
Discharge
18,32m³/s
Mean elev.
394m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Powys402.0 km²91.9% of basin
- Ceredigion35.3 km²8.1% of basin
30 intersecting protected areas
Elenydd - Mallaen
IUCN Not ReportedEmerald Network
170.82 km² overlap
Elenydd
IUCN IVSite of Special Scientific Interest
158.55 km² overlap
Elenydd
IUCN Not ReportedEmerald Network
57.37 km² overlap
Site of Special Scientific Interest
8.00 km² overlap
Claerwen
IUCN IVNational Nature Reserve
7.94 km² overlap
Coetiroedd Cwm Elan/ Elan Valley Woodlands
IUCN Not ReportedEmerald Network
4.40 km² overlap
Carngafallt
IUCN IVNature Reserve
4.07 km² overlap
Carn Gafallt
IUCN IVSite of Special Scientific Interest
3.90 km² overlap
Pumlumon (Plynlimon)
IUCN IVSite of Special Scientific Interest
3.38 km² overlap
21 more protected areassorted by overlap area
River Wye/ Afon Gwy
IUCN Not ReportedEmerald Network
1.93 km² overlap
Site of Special Scientific Interest
1.87 km² overlap
Cwm Gwynllyn
IUCN IVSite of Special Scientific Interest
0.90 km² overlap
Coedydd Glannau A Cwm Coel
IUCN IVSite of Special Scientific Interest
0.61 km² overlap
Rhosydd Llanwrthwl
IUCN IVSite of Special Scientific Interest
0.47 km² overlap
Coed Y Cefn
IUCN IVSite of Special Scientific Interest
0.27 km² overlap
Coed Yr Allt-Goch
IUCN IVSite of Special Scientific Interest
0.22 km² overlap
Cerrig-Gwalch
IUCN IVSite of Special Scientific Interest
0.19 km² overlap
Site of Special Scientific Interest
0.18 km² overlap
Rhos Yr Hafod
IUCN IVSite of Special Scientific Interest
0.14 km² overlap
Site of Special Scientific Interest
0.12 km² overlap
Caban Lakeside Woodlands
IUCN IVSite of Special Scientific Interest
0.12 km² overlap
Aberithon And Bedw Turbaries
IUCN IVSite of Special Scientific Interest
0.11 km² overlap
Rhos Dwfnant
IUCN IVSite of Special Scientific Interest
0.11 km² overlap
Gweunydd Ty'N-Y-Llidiart
IUCN IVSite of Special Scientific Interest
0.11 km² overlap
Rhos Cwmderw
IUCN IVSite of Special Scientific Interest
0.10 km² overlap
Cors Cae'R Neuadd
IUCN IVSite of Special Scientific Interest
0.09 km² overlap
Rhos Rhyd-Y-Ceir
IUCN IVSite of Special Scientific Interest
0.08 km² overlap
Caeau Hirnant
IUCN IVSite of Special Scientific Interest
0.07 km² overlap
Caeau Penglaneinon
IUCN IVSite of Special Scientific Interest
0.06 km² overlap
Caeau Cnwch A Ty'N-Y-Graig
IUCN IVSite of Special Scientific Interest
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 134 distinct species · 241 656 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 River Wye : 22 espèces reliées par 89 interactions GloBI sur 5 types (connectance 16.9%, 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°
7,7°C
Annual rain
1 542mm
Moisture idx (CMI)
0,63
Runoff
1 186mm/an
PET
570mm
AET
547mm
Mean slope
8,0°
Water table
373cm
Forest
1%
Crops
7%
Urban
0%
Protected
41%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)