HydroBASINS lev08 watershed · #2080373640
Bassin de River Alne
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
Sub-basin area
329,6km²
Upstream area
329,6km²
Discharge
4,04m³/s
Mean elev.
104m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom245.6 km²74.2% of basin
- NAEngland · United Kingdom83.7 km²25.3% of basin
- NAEngland · United Kingdom0.9 km²0.3% of basin
- NAEngland · United Kingdom0.6 km²0.2% of basin
27 intersecting protected areas
Bittell Reservoirs
IUCN IVSite of Special Scientific Interest
0.66 km² overlap
Site of Special Scientific Interest
0.54 km² overlap
Rough Hill & Wirehill Woods
IUCN IVSite of Special Scientific Interest
0.52 km² overlap
Local Nature Reserve
0.45 km² overlap
Bannam's Wood
IUCN IVSite of Special Scientific Interest
0.30 km² overlap
Hewell Park Lake
IUCN IVSite of Special Scientific Interest
0.21 km² overlap
Site of Special Scientific Interest
0.19 km² overlap
Local Nature Reserve
0.17 km² overlap
Ipsley Alders Marsh
IUCN IVSite of Special Scientific Interest
0.15 km² overlap
18 more protected areassorted by overlap area
Baddesley Clinton
IUCN VNature Reserve
0.14 km² overlap
Local Nature Reserve
0.13 km² overlap
Coughton Court
IUCN VNature Reserve
0.12 km² overlap
Copmill Hill
IUCN IVSite of Special Scientific Interest
0.12 km² overlap
Local Nature Reserve
0.11 km² overlap
Groveley Dingle
IUCN VNature Reserve
0.09 km² overlap
Hopwood Dingle
IUCN IVSite of Special Scientific Interest
0.07 km² overlap
Proctor's Barn Meadows
IUCN IVLocal Nature Reserve
0.04 km² overlap
Merriman's Hill Farm Meadows
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
Oak Tree Farm Meadows
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
River Arrow
IUCN IVLocal Nature Reserve
0.03 km² overlap
Ullenhall Meadows
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
Dagnell End Meadow
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Wilmcote Quarry
IUCN IVSite of Special Scientific Interest
0.02 km² overlap
Shrewley Canal Cutting
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Railway Meadow, Langley
IUCN IVSite of Special Scientific Interest
0.01 km² overlap
Packwood House
IUCN VNature Reserve
0.00 km² overlap
Broom Railway Cutting
IUCN IVSite of Special Scientific Interest
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 964 distinct species · 220 947 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Alne : 26 espèces reliées par 109 interactions GloBI sur 6 types (connectance 16.4%, filtre Serrano α=0.2). 11 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°
9,3°C
Annual rain
661mm
Moisture idx (CMI)
-0,02
Runoff
387mm/an
PET
671mm
AET
511mm
Mean slope
2,0°
Water table
126cm
Forest
0%
Crops
59%
Urban
16%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)