HydroBASINS lev08 watershed · #2080048830
Bassin de Titchfield Canal
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, West Sussex
Sub-basin area
814,9km²
Upstream area
814,9km²
Discharge
5,61m³/s
Mean elev.
49m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom511.3 km²62.5% of basin
- West SussexEngland · United Kingdom199.2 km²24.4% of basin
- NAEngland · United Kingdom63.2 km²7.7% of basin
- NAEngland · United Kingdom10.6 km²1.3% of basin
30 intersecting protected areas
South Downs
IUCN VNational Park
273.62 km² overlap
Chichester Harbour
IUCN VArea of Outstanding Natural Beauty
65.40 km² overlap
Chichester and Langstone Harbours
IUCN Not ReportedEmerald Network
38.54 km² overlap
Wetland of International Importance (Ramsar Site)
38.53 km² overlap
Solent Maritime
IUCN Not ReportedEmerald Network
37.40 km² overlap
Solent Maritime
IUCN Not ReportedMarine Protected Area (OSPAR)
34.54 km² overlap
Chichester and Langstone Harbours
IUCN Not ReportedMarine Protected Area (OSPAR)
31.62 km² overlap
Chichester Harbour
IUCN IVSite of Special Scientific Interest
28.79 km² overlap
Solent and Dorset Coast
IUCN Not ReportedEmerald Network
20.30 km² overlap
21 more protected areassorted by overlap area
Solent and Dorset Coast
IUCN Not ReportedSpecial Protection Area (Birds Directive)
20.26 km² overlap
Langstone Harbour
IUCN IVSite of Special Scientific Interest
9.83 km² overlap
Solent and Southampton Water
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.86 km² overlap
Solent and Southampton Water
IUCN Not ReportedEmerald Network
6.74 km² overlap
Portsmouth Harbour
IUCN IVSite of Special Scientific Interest
6.38 km² overlap
Portsmouth Harbour
IUCN Not ReportedEmerald Network
6.23 km² overlap
Portsmouth Harbour
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.22 km² overlap
Portsmouth Harbour
IUCN Not ReportedMarine Protected Area (OSPAR)
5.99 km² overlap
Medmerry
IUCN IVNature Reserve
4.91 km² overlap
Site of Special Scientific Interest
4.57 km² overlap
Solent and Southampton Water
IUCN Not ReportedMarine Protected Area (OSPAR)
3.81 km² overlap
Site of Special Scientific Interest
3.53 km² overlap
Nutborne Marshes
IUCN IVLocal Nature Reserve
2.84 km² overlap
Langstone Harbour
IUCN IVNature Reserve
2.82 km² overlap
Hook with Warsash
IUCN IVLocal Nature Reserve
2.13 km² overlap
Bracklesham Bay
IUCN IVSite of Special Scientific Interest
1.96 km² overlap
Sinah Common
IUCN IVSite of Special Scientific Interest
1.58 km² overlap
Site of Special Scientific Interest
1.51 km² overlap
Harting Downs
IUCN IVSite of Special Scientific Interest
1.45 km² overlap
Manor Farm
IUCN IVLocal Nature Reserve
1.44 km² overlap
Pagham Harbour
IUCN Not ReportedWetland of International Importance (Ramsar Site)
1.37 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 502 distinct species · 1 775 099 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Titchfield Canal : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 47 interactions GloBI sur 2 types (connectance 10.1%, filtre Serrano α=0.2). 5 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°
10,2°C
Annual rain
829mm
Moisture idx (CMI)
0,14
Runoff
462mm/an
PET
714mm
AET
541mm
Mean slope
2,0°
Water table
108cm
Forest
1%
Crops
41%
Urban
35%
Protected
47%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)