HydroBASINS lev08 watershed · #7080479500
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
99,7km²
Upstream area
7 755,3km²
Discharge
36,92m³/s
Mean elev.
1 388m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sprague River283 km²
- Bassin de Williamson River226 km²
1 dept-equivalent regions (GADM L2)
- 99.8 km²100.0% of basin
3 intersecting protected areas
Williamson River Delta
IUCN VPrivate Conservation Land
11.51 km² overlap
Reserve Program
4.33 km² overlap
Reserve Program
4.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
430 distinct species · 7 377 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 110 interactions GloBI sur 4 types (connectance 15.6%, filtre Serrano α=0.2). 10 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°
6,8°C
Annual rain
542mm
Moisture idx (CMI)
-0,48
Runoff
258mm/an
PET
1 045mm
AET
455mm
Mean slope
4,0°
Water table
371cm
Forest
70%
Crops
10%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)