HydroBASINS lev08 watershed · #7080337620
Bassin de Chiwawa 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 : Chelan, Snohomish
Sub-basin area
495,8km²
Upstream area
495,8km²
Discharge
15,22m³/s
Mean elev.
1 335m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 496.0 km²99.8% of basin
- 1.2 km²0.2% of basin
1 intersecting protected areas
Glacier Peak
IUCN IbWilderness
167.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 118 distinct species · 9 392 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Chiwawa River : 26 espèces reliées par 91 interactions GloBI sur 5 types (connectance 11.1%, filtre Serrano α=0.2). 15 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°
3,4°C
Annual rain
1 178mm
Moisture idx (CMI)
0,34
Runoff
969mm/an
PET
733mm
AET
497mm
Mean slope
21,0°
Water table
694cm
Forest
92%
Crops
0%
Urban
0%
Protected
34%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)