HydroBASINS lev08 watershed · #7080470370
Bassin de Williamson 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 1 administrative regions : Klamath
Sub-basin area
177,7km²
Upstream area
3 082,6km²
Discharge
31,04m³/s
Mean elev.
1 455m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Scott Creek1322 km²
- Bassin de Williamson River342 km²
1 dept-equivalent regions (GADM L2)
- 178.0 km²100.0% of basin
3 intersecting protected areas
Klamath Marsh
IUCN IVNational Wildlife Refuge
6.69 km² overlap
Recommended Wilderness
2.65 km² overlap
Crater Lake
IUCN IINational Park
2.62 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
278 distinct species · 1 399 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Williamson River : 28 espèces reliées par 113 interactions GloBI sur 4 types (connectance 12.5%, 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°
6,1°C
Annual rain
692mm
Moisture idx (CMI)
-0,32
Runoff
358mm/an
PET
1 024mm
AET
522mm
Mean slope
1,7°
Water table
191cm
Forest
79%
Crops
4%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)