HydroBASINS lev08 watershed · #2080053730
Bassin de River Crouch
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 : Kent, NA, Southend-on-Sea, Thurrock
Sub-basin area
747,6km²
Upstream area
747,6km²
Discharge
1,79m³/s
Mean elev.
17m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- NAEngland · United Kingdom603.4 km²80.4% of basin
- ThurrockEngland · United Kingdom86.1 km²11.5% of basin
- Southend-on-SeaEngland · United Kingdom39.0 km²5.2% of basin
- KentEngland · United Kingdom0.0 km²0.0% of basin
30 intersecting protected areas
Essex Estuaries
IUCN Not ReportedEmerald Network
57.83 km² overlap
Marine Conservation Zone
32.43 km² overlap
Blackwater, Crouch, Roach and Colne Estuaries
IUCN Not ReportedMarine Protected Area (OSPAR)
29.90 km² overlap
Essex Estuaries
IUCN Not ReportedMarine Protected Area (OSPAR)
27.19 km² overlap
Outer Thames Estuary
IUCN Not ReportedEmerald Network
24.22 km² overlap
Foulness
IUCN IVSite of Special Scientific Interest
20.87 km² overlap
Foulness (Mid-Essex Coast Phase 5)
IUCN Not ReportedEmerald Network
20.81 km² overlap
Foulness
IUCN Not ReportedWetland of International Importance (Ramsar Site)
20.73 km² overlap
Crouch and Roach Estuaries
IUCN IVSite of Special Scientific Interest
18.45 km² overlap
21 more protected areassorted by overlap area
Crouch & Roach Estuaries
IUCN IVWetland of International Importance (Ramsar Site)
18.45 km² overlap
Crouch and Roach Estuaries (Mid-Essex Coast Phase 3)
IUCN Not ReportedEmerald Network
18.45 km² overlap
Blackwater Estuary
IUCN IVWetland of International Importance (Ramsar Site)
11.98 km² overlap
Blackwater Estuary
IUCN Not ReportedWetland of International Importance (Ramsar Site)
11.98 km² overlap
Blackwater Estuary (Mid-Essex Coast Phase 4)
IUCN Not ReportedEmerald Network
11.92 km² overlap
Blackwater Estuary
IUCN IVSite of Special Scientific Interest
11.92 km² overlap
Dengie (Mid-Essex Coast Phase 1)
IUCN Not ReportedEmerald Network
10.07 km² overlap
Dengie
IUCN IVSite of Special Scientific Interest
10.03 km² overlap
Dengie
IUCN IVWetland of International Importance (Ramsar Site)
10.03 km² overlap
Foulness (Mid-Essex Coast Phase 5)
IUCN Not ReportedMarine Protected Area (OSPAR)
8.24 km² overlap
Wallasea Island
IUCN IVNature Reserve
8.09 km² overlap
Site of Special Scientific Interest
7.64 km² overlap
South Essex Marshes
IUCN IVNature Reserve
7.36 km² overlap
Blackwater Estuary (Mid-Essex Coast Phase 4)
IUCN Not ReportedMarine Protected Area (OSPAR)
6.80 km² overlap
Benfleet and Southend Marshes
IUCN Not ReportedEmerald Network
6.74 km² overlap
Benfleet & Southend Marshes
IUCN Not ReportedWetland of International Importance (Ramsar Site)
6.67 km² overlap
Crouch and Roach Estuaries (Mid-Essex Coast Phase 3)
IUCN Not ReportedMarine Protected Area (OSPAR)
6.17 km² overlap
Dengie
IUCN IVNational Nature Reserve
4.18 km² overlap
Dengie (Mid-Essex Coast Phase 1)
IUCN Not ReportedMarine Protected Area (OSPAR)
4.09 km² overlap
Benfleet and Southend Marshes
IUCN Not ReportedMarine Protected Area (OSPAR)
3.81 km² overlap
Holehaven Creek
IUCN IVSite of Special Scientific Interest
2.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 202 distinct species · 728 600 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Crouch : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 78 interactions GloBI sur 2 types (connectance 14.8%, filtre Serrano α=0.2). 2 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°
10,0°C
Annual rain
561mm
Moisture idx (CMI)
-0,18
Runoff
303mm/an
PET
688mm
AET
473mm
Mean slope
0,9°
Water table
64cm
Forest
0%
Crops
37%
Urban
34%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)