Ontologia

HydroBASINS lev08 watershed · #2080537660

Bassin de Torrente Évançon

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 2 administrative regions across 2 countries : Aosta, Visp

Pfafstetter: 21406944

Sub-basin area

248km²

Upstream area

248km²

Discharge

7,44m³/s

Mean elev.

2 163m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Dora Baltea198 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

2 127 distinct species · 18 791 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

18 791 obs · 17 cellules
Obs. / cellule
≥ 3 959
1 696–3 958
1 505–1 695
845–1 504
< 845

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

Ecological tissue

Sample of 25 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 Torrente Évançon : 14 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 58 interactions GloBI sur 5 types (connectance 15.3%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
28
Interactions affichées
58
Connectance
0.153
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°

1,3°C

Annual rain

1 602mm

Moisture idx (CMI)

0,65

Runoff

946mm/an

PET

493mm

AET

484mm

Mean slope

25,3°

Water table

822cm

Forest

52%

Crops

2%

Urban

0%

Protected

0%

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