Ontologia

HydroBASINS lev08 watershed · #2080050410

Bassin de River Mersey

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 24 administrative regions : Blackburn with Darwen, Calderdale, Halton, Kirklees, NA +3

5% lakePfafstetter: 23301800

Sub-basin area

2 380,7km²

Upstream area

2 380,7km²

Discharge

59,91m³/s

Mean elev.

152m

Administrative coverage

24 dept-equivalent regions (GADM L2)

16 more
  • NA116.3 km² · 4.9%
  • NA110.9 km² · 4.6%
  • NA106.7 km² · 4.5%
  • NA105.4 km² · 4.4%
  • NA104.8 km² · 4.4%
  • NA91.4 km² · 3.8%
  • NA85.9 km² · 3.6%
  • Halton58.6 km² · 2.4%
  • Blackburn with Darwen53.7 km² · 2.2%
  • NA46.9 km² · 2.0%
  • NA10.9 km² · 0.5%
  • NA3.9 km² · 0.2%
  • Kirklees3.6 km² · 0.2%
  • NA2.2 km² · 0.1%
  • Calderdale1.2 km² · 0.0%
  • Sheffield0.1 km² · 0.0%

30 intersecting protected areas

21 more protected areas

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

Species present

14 404 distinct species · 4 946 354 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 946 354 obs · 74 cellules
Obs. / cellule
≥ 289 651
177 726–289 650
76 640–177 725
41 884–76 639
< 41 884

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

Ecological tissue

Sample of 43 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 Mersey : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 6 types (connectance 10.2%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
43
Interactions affichées
92
Connectance
0.102
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°

9,3°C

Annual rain

1 035mm

Moisture idx (CMI)

0,38

Runoff

785mm/an

PET

632mm

AET

549mm

Mean slope

3,2°

Water table

144cm

Forest

1%

Crops

15%

Urban

55%

Protected

14%

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