Ontologia

HydroBASINS lev08 watershed · #2080520910

Bassin de la Dranse

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 across 2 countries : Haute-Savoie, Monthey, Morges

50% lakePfafstetter: 21602672

Sub-basin area

573,4km²

Upstream area

573,4km²

Discharge

17,23m³/s

Mean elev.

1 250m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Boiron1005 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

42 communes (GADM L5)

25 intersecting protected areas

  • Roc d'enfer

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    25.43 km² overlap

  • Roc d'Enfer

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    25.43 km² overlap

  • Haut Giffre

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    23.11 km² overlap

  • Cornettes de Bise

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    15.41 km² overlap

  • Cornettes De Bise

    IUCN IV

    Biotope Protection Order

    14.77 km² overlap

  • Mont De Grange

    IUCN IV

    Biotope Protection Order

    13.74 km² overlap

  • Mont de Grange

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    12.57 km² overlap

  • Impluvium d'Evian

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    12.04 km² overlap

  • Rives du Lac Léman

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    3.93 km² overlap

16 more protected areas

  • Lac Léman

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    1.38 km² overlap

  • Lac Léman

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.38 km² overlap

  • Col Ratti

    IUCN IV

    Biotope Protection Order

    1.29 km² overlap

  • Zones Humides Du Pays De Gavot

    IUCN IV

    Biotope Protection Order

    0.62 km² overlap

  • Delta de la Dranse

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.54 km² overlap

  • Delta de la Dranse

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    0.54 km² overlap

  • Delta De La Dranse

    IUCN IV

    National Nature Reserve

    0.51 km² overlap

  • Plateau Gavot

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.46 km² overlap

  • Lac de Morgins

    IUCN Not Assigned

    Private Nature Reserves

    0.17 km² overlap

  • Col de Bretolet (VS)

    IUCN IV

    Federal Inventory of Reserves for Waterbirds and Migratory Birds of International and National Imp.

    0.14 km² overlap

  • Marais De Cré-Bouché Et Léchère

    IUCN IV

    Biotope Protection Order

    0.12 km² overlap

  • Le miroir

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.10 km² overlap

  • Estuaire de la dranse

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.06 km² overlap

  • parcelles isolees

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.03 km² overlap

  • Lac de Morgins

    IUCN IV

    Federal Inventory of Fenlands of National Importance

    0.02 km² overlap

  • pres et bois - la cote d\'arbroz

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.01 km² overlap

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

Species present

8 161 distinct species · 624 539 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

624 539 obs · 28 cellules
Obs. / cellule
≥ 51 243
45 674–51 242
29 246–45 673
21 097–29 245
< 21 097

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

Ecological tissue

Sample of 29 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 la Dranse : 20 espèces reliées par 74 interactions GloBI sur 5 types (connectance 18.2%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
74
Connectance
0.182
Patrimoniales
0
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°

5,7°C

Annual rain

1 325mm

Moisture idx (CMI)

0,44

Runoff

945mm/an

PET

697mm

AET

640mm

Mean slope

20,6°

Water table

650cm

Forest

85%

Crops

6%

Urban

3%

Protected

5%

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