HydroBASINS lev08 watershed · #2080049960
Bassin de River Tâf
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 : Carmarthenshire, Pembrokeshire
Sub-basin area
790,6km²
Upstream area
790,6km²
Discharge
1,26m³/s
Mean elev.
92m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Carmarthenshire454.8 km²57.3% of basin
- Pembrokeshire311.0 km²39.2% of basin
30 intersecting protected areas
Arfordir Penfro
IUCN VNational Park
120.03 km² overlap
Castlemartin Range
IUCN IVSite of Special Scientific Interest
21.10 km² overlap
Pembrokeshire Marine/ Sir Benfro Forol
IUCN Not ReportedEmerald Network
21.05 km² overlap
Pembrokeshire Marine / Sir Benfro Forol
IUCN Not ReportedMarine Protected Area (OSPAR)
19.06 km² overlap
Carmarthen Bay and Estuaries/ Bae Caerfyrddin ac Aberoedd
IUCN Not ReportedEmerald Network
15.18 km² overlap
Site of Special Scientific Interest
14.19 km² overlap
Carmarthen Bay and Estuaries / Bae Caerfyrddin ac Aberoedd
IUCN Not ReportedMarine Protected Area (OSPAR)
12.20 km² overlap
Castlemartin Coast
IUCN Not ReportedEmerald Network
11.02 km² overlap
Emerald Network
10.86 km² overlap
21 more protected areassorted by overlap area
Carmarthen Bay Dunes/ Twyni Bae Caerfyrddin
IUCN Not ReportedEmerald Network
7.51 km² overlap
Bristol Channel Approaches / Dynesfeydd Môr Hafren
IUCN Not ReportedEmerald Network
7.32 km² overlap
Bristol Channel Approaches / Dynesfeydd Mor Hafren
IUCN Not AssignedMarine Protected Area (OSPAR)
7.31 km² overlap
Milford Haven Waterway
IUCN IVSite of Special Scientific Interest
6.69 km² overlap
Stackpole
IUCN VNature Reserve
6.55 km² overlap
Aber Taf / Taf Estuary
IUCN IVSite of Special Scientific Interest
5.60 km² overlap
Emerald Network
3.64 km² overlap
Marine Protected Area (OSPAR)
3.63 km² overlap
Stackpole
IUCN IVSite of Special Scientific Interest
3.14 km² overlap
Stackpole
IUCN IVNational Nature Reserve
2.33 km² overlap
Site of Special Scientific Interest
2.30 km² overlap
Site of Special Scientific Interest
1.96 km² overlap
Broomhill Burrows
IUCN IVSite of Special Scientific Interest
1.95 km² overlap
West Wales Marine / Gorllewin Cymru Forol
IUCN Not ReportedEmerald Network
1.82 km² overlap
West Wales Marine / Gorllewin Cymru Forol
IUCN Not AssignedMarine Protected Area (OSPAR)
1.80 km² overlap
Afon Tywi
IUCN IVSite of Special Scientific Interest
1.60 km² overlap
Bae Caerfyrddin/ Carmarthen Bay
IUCN Not ReportedEmerald Network
1.46 km² overlap
Bae Caerfyrddin / Carmarthen Bay
IUCN Not ReportedMarine Protected Area (OSPAR)
1.46 km² overlap
Site of Special Scientific Interest
1.40 km² overlap
Site of Special Scientific Interest
1.39 km² overlap
Site of Special Scientific Interest
1.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 463 distinct species · 254 536 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 Tâf : 15 espèces reliées par 31 interactions GloBI sur 4 types (connectance 13.4%, filtre Serrano α=0.2). 7 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°
9,8°C
Annual rain
963mm
Moisture idx (CMI)
0,41
Runoff
992mm/an
PET
567mm
AET
495mm
Mean slope
4,2°
Water table
208cm
Forest
4%
Crops
14%
Urban
3%
Protected
19%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)