Ruisseau· 2 segments
River Roach
Crosses 2 administrative regions : NA, Southend-on-Sea
Total length
21km
Max discharge
1m³/s
Max Strahler
2
Segments matched
2
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- NAEngland · United Kingdom15.2 kmin this dpt
- Southend-on-SeaEngland · United Kingdom2.1 kmin this dpt
14 intersecting protected areas
Outer Thames Estuary
IUCN Not ReportedEmerald Network
Essex Estuaries
IUCN Not ReportedEmerald Network
Essex Estuaries
IUCN Not ReportedMarine Protected Area (OSPAR)
Marine Conservation Zone
Blackwater, Crouch, Roach and Colne Estuaries
IUCN Not ReportedMarine Protected Area (OSPAR)
Foulness
IUCN IVSite of Special Scientific Interest
Foulness
IUCN Not ReportedWetland of International Importance (Ramsar Site)
Foulness (Mid-Essex Coast Phase 5)
IUCN Not ReportedEmerald Network
Foulness (Mid-Essex Coast Phase 5)
IUCN Not ReportedMarine Protected Area (OSPAR)
5 more protected areassorted by area
Crouch and Roach Estuaries
IUCN IVSite of Special Scientific Interest
Crouch & Roach Estuaries
IUCN IVWetland of International Importance (Ramsar Site)
Crouch and Roach Estuaries (Mid-Essex Coast Phase 3)
IUCN Not ReportedEmerald Network
Wallasea Island
IUCN IVNature Reserve
Crouch and Roach Estuaries (Mid-Essex Coast Phase 3)
IUCN Not ReportedMarine Protected Area (OSPAR)
1 page = 1 named river (aggregation of 2 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
1 238 distinct species · 9 345 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 River Roach : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 111 interactions GloBI sur 5 types (connectance 14.2%, 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).
Hydrology (HydroRIVERS v10)
Total length
21km
Max discharge
1,0m³/s
Max Strahler
2
Segments matched
2
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.