Ontologia

HydroBASINS lev08 watershed · #2080378340

Bassin de River Severn

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 3 administrative regions : Herefordshire, County of, NA

Pfafstetter: 23301430

Sub-basin area

240,6km²

Upstream area

6 926,6km²

Discharge

138,9m³/s

Mean elev.

41m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de River Severn1209 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

5 576 distinct species · 241 401 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

241 401 obs · 6 cellules
Obs. / cellule
≥ 99 279
99 279–99 278
54 869–99 278
27 896–54 868
< 27 896

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 35 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de River Severn : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 127 interactions GloBI sur 5 types (connectance 19.1%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
127
Connectance
0.191
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

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

669mm

Moisture idx (CMI)

-0,01

Runoff

441mm/an

PET

672mm

AET

512mm

Mean slope

1,9°

Water table

86cm

Forest

0%

Crops

62%

Urban

11%

Protected

13%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)