HydroBASINS lev08 watershed · #2080049120
Bassin de River Exe
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 : NA, Somerset
Sub-basin area
1 243,2km²
Upstream area
1 243,2km²
Discharge
33,17m³/s
Mean elev.
182m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom925.0 km²74.1% of basin
- SomersetEngland · United Kingdom322.6 km²25.9% of basin
30 intersecting protected areas
Exmoor
IUCN VNational Park
264.38 km² overlap
Blackdown Hills
IUCN VArea of Outstanding Natural Beauty
96.73 km² overlap
North Exmoor
IUCN IVSite of Special Scientific Interest
29.05 km² overlap
Exmoor Heaths
IUCN Not ReportedEmerald Network
24.20 km² overlap
South Exmoor
IUCN IVSite of Special Scientific Interest
20.98 km² overlap
Barle Valley
IUCN IVSite of Special Scientific Interest
6.53 km² overlap
Exmoor and Quantock Oakwoods
IUCN Not ReportedEmerald Network
5.17 km² overlap
Exe Estuary
IUCN Not ReportedEmerald Network
2.37 km² overlap
Exe Estuary
IUCN IVSite of Special Scientific Interest
2.37 km² overlap
21 more protected areassorted by overlap area
Exe Estuary
IUCN Not ReportedWetland of International Importance (Ramsar Site)
2.36 km² overlap
Holnicote
IUCN VNature Reserve
2.30 km² overlap
Killerton
IUCN VNature Reserve
1.28 km² overlap
River Barle
IUCN IVSite of Special Scientific Interest
1.04 km² overlap
Stoke Woods
IUCN IVSite of Special Scientific Interest
0.92 km² overlap
Brampford Speke
IUCN IVSite of Special Scientific Interest
0.83 km² overlap
Pinkworthy and Driver Farm
IUCN IVSite of Special Scientific Interest
0.70 km² overlap
Exe Estuary
IUCN Not ReportedMarine Protected Area (OSPAR)
0.69 km² overlap
Dunkery & Horner Wood
IUCN IVNational Nature Reserve
0.67 km² overlap
Southey and Gotleigh Moors
IUCN IVSite of Special Scientific Interest
0.62 km² overlap
Site of Special Scientific Interest
0.58 km² overlap
Knightshayes
IUCN VNature Reserve
0.55 km² overlap
Dartmoor
IUCN VNational Park
0.55 km² overlap
Killerton
IUCN IVSite of Special Scientific Interest
0.55 km² overlap
Local Nature Reserve
0.48 km² overlap
Maiden Down
IUCN IVSite of Special Scientific Interest
0.40 km² overlap
Winsford Hill
IUCN VNature Reserve
0.38 km² overlap
Buzzards
IUCN VNature Reserve
0.38 km² overlap
Exe Estuary
IUCN IVNature Reserve
0.35 km² overlap
Tarr Steps Woodland
IUCN IVNational Nature Reserve
0.33 km² overlap
Briggins Moor
IUCN IVSite of Special Scientific Interest
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 665 distinct species · 531 520 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 River Exe : 13 espèces reliées par 146 interactions GloBI sur 6 types (connectance 33.6%, filtre Serrano α=0.2). 17 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°
9,2°C
Annual rain
1 076mm
Moisture idx (CMI)
0,41
Runoff
844mm/an
PET
617mm
AET
535mm
Mean slope
4,8°
Water table
229cm
Forest
0%
Crops
28%
Urban
5%
Protected
30%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)