HydroBASINS lev08 watershed · #2080554650
Bassin de la Jonche
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 1 administrative regions : Isère
Sub-basin area
90,2km²
Upstream area
1 578,7km²
Discharge
27,36m³/s
Mean elev.
938m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Bonne372 km²
- Bassin de la Souloise345 km²
1 dept-equivalent regions (GADM L2)
- 90.4 km²100.0% of basin
20 communes (GADM L5)Available for FRA, RWA
- Saint-Jean-d'Hérans17.63 km²98% commune
- Mayres-Savel10.99 km²79% commune
- Susville10.12 km²99% commune
- Saint-Honoré9.81 km²68% commune
- Prunières8.44 km²100% commune
- Pierre-Châtel8.28 km²68% commune
- Saint-Arey6.69 km²100% commune
- La Mure6.13 km²71% commune
- Saint-Sébastien3.18 km²15% commune
- Lavars2.61 km²17% commune
- Cornillon-en-Trièves2.12 km²15% commune
- Cognet1.97 km²100% commune
- Ponsonnas1.90 km²68% commune
- Mens0.16 km²1% commune
- Saint-Pierre-de-Méaroz0.15 km²3% commune
- Villard-Saint-Christophe0.11 km²1% commune
- La Motte-d'Aveillans0.05 km²0% commune
- La Valette0.03 km²0% commune
- La Motte-Saint-Martin0.01 km²0% commune
- Lavaldens0.00 km²0% commune
3 intersecting protected areas
Marais De La Mure
IUCN IVBiotope Protection Order
0.50 km² overlap
Biotope Protection Order
0.28 km² overlap
Marais Des Révoulins
IUCN IVBiotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 872 distinct species · 274 049 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 de la Jonche : 15 espèces reliées par 61 interactions GloBI sur 4 types (connectance 26.4%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
8,0°C
Annual rain
1 006mm
Moisture idx (CMI)
0,16
Runoff
493mm/an
PET
837mm
AET
673mm
Mean slope
14,0°
Water table
542cm
Forest
86%
Crops
2%
Urban
6%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)