HydroBASINS lev08 watershed · #7080215620
Bassin de Piwei River
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 : Division No. 14, Division No. 9
Sub-basin area
762,7km²
Upstream area
762,8km²
Discharge
0,66m³/s
Mean elev.
576m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- Division No. 14684.3 km²89.4% of basin
- Division No. 981.3 km²10.6% of basin
7 intersecting protected areas
Big Valley Lake
IUCN IbRepresentative Area Ecological Reserve
24.54 km² overlap
Wildlife Habitat Protection
IUCN Not ApplicableWildlife Habitat Protection
11.05 km² overlap
Piwei Lake
IUCN IbRepresentative Area Ecological Reserve
3.49 km² overlap
Fish and Wildlife Development Fund Land
1.38 km² overlap
Fish and Wildlife Development Fund Land
0.92 km² overlap
Crown Conservation Easement
IUCN IVCrown Conservation Easement
0.65 km² overlap
Fish and Wildlife Development Fund Land
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
61 distinct species · 81 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Piwei River : 24 espèces reliées par 24 interactions GloBI sur 4 types (connectance 7.4%, filtre Serrano α=0.2). 2 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°
-0,1°C
Annual rain
469mm
Moisture idx (CMI)
-0,31
Runoff
16mm/an
PET
677mm
AET
404mm
Mean slope
1,4°
Water table
40cm
Forest
94%
Crops
3%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)