HydroBASINS lev08 watershed · #2080542270
Bassin du Bréda
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 : Isère, Savoie
Sub-basin area
231,6km²
Upstream area
231,6km²
Discharge
3,71m³/s
Mean elev.
1 444m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 200.1 km²86.2% of basin
- 32.1 km²13.8% of basin
22 communes (GADM L5)Available for FRA, RWA
- La Ferrière71.49 km²95% commune
- Pinsot43.17 km²99% commune
- Allevard34.62 km²100% commune
- La Chapelle-du-Bard26.91 km²100% commune
- Arvillard20.91 km²71% commune
- Saint-Maximin8.01 km²79% commune
- Saint-Pierre-d'Allevard6.41 km²24% commune
- Le Moutaret5.28 km²100% commune
- La Chapelle-Blanche3.64 km²85% commune
- Pontcharra3.61 km²22% commune
- Détrier2.43 km²100% commune
- Saint-Colomban-des-Villards1.79 km²2% commune
- La Rochette1.25 km²26% commune
- Saint-Rémy-de-Maurienne0.87 km²2% commune
- Laissaud0.74 km²11% commune
- Vaujany0.45 km²1% commune
- Villaroux0.38 km²13% commune
- Saint-Alban-des-Villards0.05 km²0% commune
- Laval0.05 km²0% commune
- Allemond0.04 km²0% commune
- Theys0.01 km²0% commune
- Saint-Étienne-de-Cuines0.01 km²0% commune
5 intersecting protected areas
Belledonne
IUCN IVNational Hunting and Wildlife Reserve
13.09 km² overlap
Biotope Protection Order
0.27 km² overlap
Tourbiere De Pre Rond
IUCN IVBiotope Protection Order
0.02 km² overlap
Tourbiere Des Plagnes
IUCN IVBiotope Protection Order
0.02 km² overlap
Biotope Protection Order
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 303 distinct species · 119 501 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin du Bréda : 21 espèces + 3 bulles famille, 44 interactions GloBI documentées sur 3 types (connectance 15.9%, filtre Serrano α=0.2). Les 3 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
5,4°C
Annual rain
1 265mm
Moisture idx (CMI)
0,39
Runoff
517mm/an
PET
710mm
AET
624mm
Mean slope
23,9°
Water table
754cm
Forest
79%
Crops
1%
Urban
5%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)