HydroBASINS lev08 watershed · #2080049840
Bassin de Ogmore River
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, Rhondda Cynon Taf
Sub-basin area
281,7km²
Upstream area
281,8km²
Discharge
8,78m³/s
Mean elev.
153m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- NA195.1 km²69.0% of basin
- NA56.3 km²19.9% of basin
- 23.7 km²8.4% of basin
- NA7.7 km²2.7% of basin
25 intersecting protected areas
Glamorgan Coast
IUCN Not AssignedHeritage Coast
6.48 km² overlap
Kenfig/ Cynffig
IUCN Not ReportedEmerald Network
1.41 km² overlap
Merthyr Mawr
IUCN IVSite of Special Scientific Interest
1.41 km² overlap
Merthyr Mawr Warren
IUCN IVNational Nature Reserve
1.31 km² overlap
Brynna A Wern Tarw
IUCN IVSite of Special Scientific Interest
1.31 km² overlap
Old Castle Down
IUCN IVSite of Special Scientific Interest
0.79 km² overlap
Blackmill Woodlands
IUCN IVSite of Special Scientific Interest
0.71 km² overlap
Blackmill Woodlands
IUCN Not ReportedEmerald Network
0.71 km² overlap
Bryn - Bach, Cefn Cribwr
IUCN IVSite of Special Scientific Interest
0.40 km² overlap
16 more protected areassorted by overlap area
Glaswelltiroedd Cefn Cribwr/ Cefn Cribwr Grasslands
IUCN Not ReportedEmerald Network
0.30 km² overlap
Ewenny And Pant Quarries
IUCN IVSite of Special Scientific Interest
0.29 km² overlap
Cwm Du Woodlands
IUCN IVSite of Special Scientific Interest
0.24 km² overlap
Cwm Cyffog
IUCN IVSite of Special Scientific Interest
0.17 km² overlap
Coed Y Mwstwr Woodlands
IUCN IVSite of Special Scientific Interest
0.15 km² overlap
Cwm Risca Meadow
IUCN IVSite of Special Scientific Interest
0.09 km² overlap
Clemenstone Meadows, Wick
IUCN IVSite of Special Scientific Interest
0.05 km² overlap
Daren Y Dimbath
IUCN IVSite of Special Scientific Interest
0.05 km² overlap
Mynydd Ty-Isaf, Rhondda
IUCN IVSite of Special Scientific Interest
0.04 km² overlap
Kenfig / Cynffig
IUCN Not ReportedMarine Protected Area (OSPAR)
0.04 km² overlap
Tremains Wood
IUCN Not ReportedLocal Nature Reserve
0.03 km² overlap
Craig-Y-Parciau Woodland
IUCN Not ReportedLocal Nature Reserve
0.03 km² overlap
Coed Y Bwl
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Cnap Twt
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Southerndown Coast
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Caeau Cefn Cribwr
IUCN IVSite of Special Scientific Interest
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 644 distinct species · 210 402 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Ogmore River : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 117 interactions GloBI sur 5 types (connectance 25.2%, 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°
9,5°C
Annual rain
1 186mm
Moisture idx (CMI)
0,47
Runoff
968mm/an
PET
620mm
AET
554mm
Mean slope
5,9°
Water table
248cm
Forest
1%
Crops
16%
Urban
23%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)