Ontologia

HydroBASINS lev08 watershed · #2080556780

Bassin du Drac

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 : Hautes-Alpes, Isère

Pfafstetter: 21602449

Sub-basin area

540,5km²

Upstream area

540,6km²

Discharge

10,13m³/s

Mean elev.

1 731m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de la Souloise345 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

37 communes (GADM L5)

9 intersecting protected areas

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

Species present

5 694 distinct species · 763 737 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

763 737 obs · 13 cellules
Obs. / cellule
≥ 117 613
116 842–117 612
79 121–116 841
60 729–79 120
< 60 729

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

Ecological tissue

Sample of 36 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 du Drac : 32 espèces + 4 bulles famille, 61 interactions GloBI documentées sur 3 types (connectance 9.7%, filtre Serrano α=0.2). Les 4 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
36
Interactions affichées
61
Connectance
0.097
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°

4,4°C

Annual rain

1 210mm

Moisture idx (CMI)

0,42

Runoff

507mm/an

PET

657mm

AET

587mm

Mean slope

21,5°

Water table

730cm

Forest

55%

Crops

6%

Urban

0%

Protected

81%

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