HydroBASINS lev08 watershed · #7080598590
Bassin de San Joaquin 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 5 administrative regions : Alameda, Merced, San Joaquin, Santa Clara, Stanislaus
Sub-basin area
1 898,8km²
Upstream area
33 304,8km²
Discharge
185,91m³/s
Mean elev.
202m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
5 dept-equivalent regions (GADM L2)
- 1705.4 km²89.8% of basin
- 177.4 km²9.3% of basin
- 16.7 km²0.9% of basin
- 0.2 km²0.0% of basin
- 0.0 km²0.0% of basin
15 intersecting protected areas
Private Conservation Land
62.29 km² overlap
Conservation
IUCN Not AssignedEasement
6.29 km² overlap
San Joaquin River
IUCN VNational Wildlife Refuge
5.44 km² overlap
Reserve Program
2.88 km² overlap
Dos Rios Ranch
IUCN VPrivate Conservation
2.43 km² overlap
Reserve Program
2.42 km² overlap
Deer Park Canyon
IUCN VPark
1.62 km² overlap
Red Mountain
IUCN VConservation Easement
1.43 km² overlap
West Hilmar
IUCN VWildlife Area
1.40 km² overlap
6 more protected areassorted by overlap area
Watershed Protection
1.07 km² overlap
Conservation
IUCN Not AssignedEasement
0.59 km² overlap
Espinoza Farm
IUCN Not AssignedConservation Easement
0.16 km² overlap
Espinosa, Jr
IUCN Not AssignedConservation Easement
0.16 km² overlap
Espinosa, Sr.
IUCN Not AssignedConservation Easement
0.16 km² overlap
Hideout Canyon
IUCN VConservation Easement
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 778 distinct species · 221 694 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 San Joaquin River : 18 espèces reliées par 69 interactions GloBI sur 3 types (connectance 14.8%, filtre Serrano α=0.2). 13 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°
15,9°C
Annual rain
354mm
Moisture idx (CMI)
-0,75
Runoff
102mm/an
PET
1 433mm
AET
299mm
Mean slope
4,9°
Water table
265cm
Forest
34%
Crops
51%
Urban
4%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)