HydroBASINS lev08 watershed · #2080048980
Bassin de River Avon
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 : Bournemouth, Christchurch and Po, NA
Sub-basin area
3,7km²
Upstream area
2 950,1km²
Discharge
55,74m³/s
Mean elev.
1m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de River Stour1231 km²
- Bassin de River Avon461 km²
2 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom3.3 km²89.2% of basin
- Bournemouth, Christchurch and PoEngland · United Kingdom0.4 km²10.4% of basin
12 intersecting protected areas
Christchurch Harbour
IUCN IVSite of Special Scientific Interest
1.71 km² overlap
Solent and Dorset Coast
IUCN Not ReportedEmerald Network
1.07 km² overlap
Solent and Dorset Coast
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.07 km² overlap
Stanpit Marsh, Christchurch
IUCN IVLocal Nature Reserve
0.55 km² overlap
Hengistbury Head
IUCN IVLocal Nature Reserve
0.18 km² overlap
Purewell Meadows
IUCN IVSite of Special Scientific Interest
0.09 km² overlap
Purewell Meadows
IUCN IVLocal Nature Reserve
0.04 km² overlap
River Avon System
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
River Avon
IUCN Not ReportedEmerald Network
0.03 km² overlap
3 more protected areassorted by overlap area
Avon Valley
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.02 km² overlap
Site of Special Scientific Interest
0.02 km² overlap
Avon Valley
IUCN Not ReportedEmerald Network
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 387 distinct species · 93 322 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Avon : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 2 types (connectance 12.6%, 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°
10,1°C
Annual rain
796mm
Moisture idx (CMI)
0,10
Runoff
531mm/an
PET
716mm
AET
536mm
Mean slope
0,4°
Water table
11cm
Forest
19%
Crops
18%
Urban
87%
Protected
50%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)