HydroBASINS lev08 watershed · #7080583190
Bassin de Cosumnes 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 4 administrative regions : Amador, El Dorado, Sacramento, San Joaquin
Sub-basin area
2 420,5km²
Upstream area
2 420,8km²
Discharge
28,96m³/s
Mean elev.
575m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 1341.2 km²55.4% of basin
- 815.0 km²33.6% of basin
- 266.0 km²11.0% of basin
- 0.0 km²0.0% of basin
26 intersecting protected areas
Cosumnes River
IUCN VPreserve
27.02 km² overlap
Reserve Program
26.38 km² overlap
Cosumnes River
IUCN VEcological Reserve
18.39 km² overlap
Deer Creek Hills
IUCN VState Conservation Area
16.60 km² overlap
Blue Oak Hills
IUCN VPrivate Conservation
13.95 km² overlap
El Dorado Ranch
IUCN VPrivate Conservation
12.70 km² overlap
Cosumnes River Macrosite
IUCN VEasement
12.55 km² overlap
Sacramento Valley Conservancy
IUCN Not AssignedEasement
6.64 km² overlap
Conservation
IUCN Not AssignedEasement
4.34 km² overlap
17 more protected areassorted by overlap area
Watershed Protection
2.50 km² overlap
Ladies Valley
IUCN VPrivate Conservation
1.97 km² overlap
Grizzly Slough
IUCN Not AssignedConservation Easement
1.50 km² overlap
Cosumnes Floodplain
IUCN Not AssignedMitigation Bank
1.25 km² overlap
Reserve Program
1.11 km² overlap
Twin Cities
IUCN Not AssignedConservation Easement
1.03 km² overlap
Dumas/Sutter Home
IUCN Not AssignedConservation Easement
0.89 km² overlap
Laguna Terrace East
IUCN Not AssignedConservation Easement
0.81 km² overlap
Bureau of Land Management
IUCN Not AssignedEasement
0.66 km² overlap
Cosumnes River Lowlands
IUCN VEasement
0.61 km² overlap
Leek Springs
IUCN VEcological Reserve
0.61 km² overlap
Wells
IUCN VPreserve
0.60 km² overlap
Rocha/Mello Farm
IUCN Not AssignedConservation Easement
0.39 km² overlap
Horan
IUCN VPrivate Conservation
0.34 km² overlap
Van Noord
IUCN VPrivate Conservation
0.33 km² overlap
Smith and Gabb 2
IUCN VPrivate Conservation
0.29 km² overlap
Lipa Waterfalls
IUCN VPrivate Conservation
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 380 distinct species · 424 986 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Cosumnes River : 28 espèces reliées par 91 interactions GloBI sur 4 types (connectance 15.3%, 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°
14,2°C
Annual rain
851mm
Moisture idx (CMI)
-0,33
Runoff
380mm/an
PET
1 307mm
AET
553mm
Mean slope
5,8°
Water table
299cm
Forest
57%
Crops
8%
Urban
3%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)