HydroBASINS lev08 watershed · #2080049850
Bassin de River Afan
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 3 administrative regions : NA, Rhondda Cynon Taf
Sub-basin area
222,6km²
Upstream area
222,6km²
Discharge
3,21m³/s
Mean elev.
173m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- NA157.2 km²70.3% of basin
- NA61.9 km²27.7% of basin
- 0.2 km²0.1% of basin
20 intersecting protected areas
Kenfig/ Cynffig
IUCN Not ReportedEmerald Network
9.21 km² overlap
Cynffig/Kenfig
IUCN IVSite of Special Scientific Interest
6.95 km² overlap
Kenfig Pool And Dunes
IUCN Not ReportedLocal Nature Reserve
5.48 km² overlap
Kenfig Pool And Dunes
IUCN IVNational Nature Reserve
5.14 km² overlap
Glamorgan Coast
IUCN Not AssignedHeritage Coast
3.17 km² overlap
Merthyr Mawr
IUCN IVSite of Special Scientific Interest
2.90 km² overlap
Merthyr Mawr Warren
IUCN IVNational Nature Reserve
1.93 km² overlap
Kenfig / Cynffig
IUCN Not ReportedMarine Protected Area (OSPAR)
1.36 km² overlap
Margam Moors
IUCN IVSite of Special Scientific Interest
1.10 km² overlap
11 more protected areassorted by overlap area
Eglwys Nunydd Reservoir
IUCN IVSite of Special Scientific Interest
1.03 km² overlap
Lock'S Common
IUCN Not ReportedLocal Nature Reserve
0.34 km² overlap
Glaswelltiroedd Cefn Cribwr/ Cefn Cribwr Grasslands
IUCN Not ReportedEmerald Network
0.28 km² overlap
Caeau Cefn Cribwr
IUCN IVSite of Special Scientific Interest
0.25 km² overlap
Bryn Tip
IUCN Not ReportedLocal Nature Reserve
0.23 km² overlap
Waun Cimla
IUCN IVSite of Special Scientific Interest
0.15 km² overlap
Waun-Fawr, Cefn Cribwr
IUCN IVSite of Special Scientific Interest
0.09 km² overlap
Penycastell, Cefn Cribwr
IUCN IVSite of Special Scientific Interest
0.08 km² overlap
Stormy Down
IUCN IVSite of Special Scientific Interest
0.06 km² overlap
Frog Pond Wood
IUCN Not ReportedLocal Nature Reserve
0.03 km² overlap
Mynydd Ty-Isaf, Rhondda
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 494 distinct species · 352 141 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 Afan : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 6 types (connectance 13.7%, 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°
9,5°C
Annual rain
1 249mm
Moisture idx (CMI)
0,50
Runoff
1 024mm/an
PET
611mm
AET
553mm
Mean slope
6,7°
Water table
260cm
Forest
16%
Crops
13%
Urban
23%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)