HydroBASINS lev08 watershed · #2080393160
Bassin de River Ver
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 8 administrative regions : Luton, NA, Surrey
Sub-basin area
973,6km²
Upstream area
973,6km²
Discharge
8,4m³/s
Mean elev.
115m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom577.8 km²59.1% of basin
- NAEngland · United Kingdom270.8 km²27.7% of basin
- NAEngland · United Kingdom67.5 km²6.9% of basin
- NAEngland · United Kingdom40.2 km²4.1% of basin
- SurreyEngland · United Kingdom13.7 km²1.4% of basin
- NAEngland · United Kingdom3.6 km²0.4% of basin
- NAEngland · United Kingdom2.1 km²0.2% of basin
- LutonEngland · United Kingdom1.7 km²0.2% of basin
30 intersecting protected areas
Chilterns
IUCN VArea of Outstanding Natural Beauty
279.32 km² overlap
Ashridge Estate
IUCN VNature Reserve
9.39 km² overlap
Chilterns Beechwoods
IUCN Not ReportedEmerald Network
6.19 km² overlap
Ashridge Commons and Woods
IUCN IVSite of Special Scientific Interest
6.18 km² overlap
South West London Waterbodies
IUCN Not ReportedWetland of International Importance (Ramsar Site)
5.86 km² overlap
South West London Waterbodies
IUCN Not ReportedEmerald Network
5.86 km² overlap
Staines Moor
IUCN IVSite of Special Scientific Interest
5.09 km² overlap
Ruislip Woods
IUCN IVSite of Special Scientific Interest
3.08 km² overlap
Ruislip Woods
IUCN IVNational Nature Reserve
3.07 km² overlap
21 more protected areassorted by overlap area
Wraysbury Reservoir
IUCN IVSite of Special Scientific Interest
2.06 km² overlap
Mid Colne Valley
IUCN IVSite of Special Scientific Interest
1.48 km² overlap
Hodgemoor Wood
IUCN IVSite of Special Scientific Interest
1.03 km² overlap
Chorleywood Common
IUCN IVLocal Nature Reserve
0.76 km² overlap
Hillfield Park Reservoir
IUCN IVLocal Nature Reserve
0.75 km² overlap
Kensworth Chalk Pit
IUCN IVSite of Special Scientific Interest
0.73 km² overlap
Bricket Wood Common
IUCN IVSite of Special Scientific Interest
0.73 km² overlap
Oxhey Woods
IUCN IVLocal Nature Reserve
0.72 km² overlap
Frays Valley
IUCN IVLocal Nature Reserve
0.72 km² overlap
Whippendell Wood
IUCN IVSite of Special Scientific Interest
0.67 km² overlap
Chorleywood House Estate
IUCN IVLocal Nature Reserve
0.64 km² overlap
Site of Special Scientific Interest
0.59 km² overlap
Redwell Wood
IUCN IVSite of Special Scientific Interest
0.53 km² overlap
Stanmore Common
IUCN IVLocal Nature Reserve
0.41 km² overlap
Croxley Common Moor
IUCN IVLocal Nature Reserve
0.41 km² overlap
Rickmansworth Aquadrome
IUCN IVLocal Nature Reserve
0.41 km² overlap
Croxley Common Moor
IUCN IVSite of Special Scientific Interest
0.40 km² overlap
Stockers Lake
IUCN IVLocal Nature Reserve
0.38 km² overlap
Stoke Common
IUCN IVSite of Special Scientific Interest
0.37 km² overlap
Black Park
IUCN IVLocal Nature Reserve
0.33 km² overlap
Local Nature Reserve
0.30 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 747 distinct species · 2 102 491 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Ver : 22 espèces reliées par 53 interactions GloBI sur 2 types (connectance 13.1%, 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°
9,7°C
Annual rain
667mm
Moisture idx (CMI)
-0,05
Runoff
271mm/an
PET
706mm
AET
523mm
Mean slope
2,0°
Water table
170cm
Forest
1%
Crops
19%
Urban
41%
Protected
31%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)