HydroBASINS lev08 watershed · #2080402990
Bassin de River Nadder
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 1 administrative regions : NA
Sub-basin area
16,7km²
Upstream area
675,4km²
Discharge
12,02m³/s
Mean elev.
74m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de River Wylye445 km²
- Bassin de River Nadder214 km²
1 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom16.8 km²100.0% of basin
5 intersecting protected areas
River Avon System
IUCN IVSite of Special Scientific Interest
0.29 km² overlap
River Avon
IUCN Not ReportedEmerald Network
0.20 km² overlap
Area of Outstanding Natural Beauty
0.18 km² overlap
Local Nature Reserve
0.05 km² overlap
West Harnham Chalk Pit
IUCN IVSite of Special Scientific Interest
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 991 distinct species · 37 177 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Nadder : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 158 interactions GloBI sur 6 types (connectance 21.3%, filtre Serrano α=0.2). 16 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
756mm
Moisture idx (CMI)
0,07
Runoff
517mm/an
PET
702mm
AET
525mm
Mean slope
2,2°
Water table
156cm
Forest
0%
Crops
59%
Urban
46%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)