HydroBASINS lev08 watershed · #2080050330
Bassin de Afon Ffyddion
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 : Flintshire, NA
Sub-basin area
175,8km²
Upstream area
175,8km²
Discharge
4,14m³/s
Mean elev.
104m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Flintshire130.0 km²73.7% of basin
- NA36.0 km²20.4% of basin
22 intersecting protected areas
Area Of Outstanding Natural Beauty
16.98 km² overlap
The Dee Estuary
IUCN Not ReportedEmerald Network
16.57 km² overlap
The Dee Estuary
IUCN Not ReportedWetland of International Importance (Ramsar Site)
16.54 km² overlap
Site of Special Scientific Interest
13.26 km² overlap
Dee Estuary/ Aber Dyfrdwy
IUCN Not ReportedEmerald Network
12.50 km² overlap
Dee Estuary / Aber Dyfrdwy
IUCN Not ReportedMarine Protected Area (OSPAR)
7.63 km² overlap
Dee Estuary
IUCN IVNature Reserve
7.32 km² overlap
The Dee Estuary
IUCN Not ReportedMarine Protected Area (OSPAR)
6.30 km² overlap
Site of Special Scientific Interest
3.28 km² overlap
13 more protected areassorted by overlap area
Site of Special Scientific Interest
1.87 km² overlap
Halkyn Mountain/ Mynydd Helygain
IUCN Not ReportedEmerald Network
1.83 km² overlap
Gronant Dunes
IUCN Not ReportedLocal Nature Reserve
1.21 km² overlap
Liverpool Bay / Bae Lerpwl
IUCN Not ReportedEmerald Network
0.29 km² overlap
Moel Hiraddug A Bryn Gop
IUCN IVSite of Special Scientific Interest
0.26 km² overlap
Graig Fawr
IUCN IVSite of Special Scientific Interest
0.26 km² overlap
Site of Special Scientific Interest
0.26 km² overlap
Prestatyn Hillside
IUCN IVSite of Special Scientific Interest
0.24 km² overlap
Site of Special Scientific Interest
0.11 km² overlap
Maes Hiraddug
IUCN IVSite of Special Scientific Interest
0.04 km² overlap
Hendre Bach
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Teilia Quarry
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Herward Smithy
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 615 distinct species · 106 881 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Afon Ffyddion : 16 espèces reliées par 129 interactions GloBI sur 6 types (connectance 29.7%, filtre Serrano α=0.2). 14 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
836mm
Moisture idx (CMI)
0,28
Runoff
743mm/an
PET
601mm
AET
501mm
Mean slope
3,1°
Water table
171cm
Forest
6%
Crops
13%
Urban
25%
Protected
20%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)