HydroBASINS lev08 watershed · #7080604120
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 1 administrative regions : Merced
Sub-basin area
21,2km²
Upstream area
26 150,8km²
Discharge
138,79m³/s
Mean elev.
22m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Delta-Mendota Canal1674 km²
- Bassin de San Joaquin River31 km²
1 dept-equivalent regions (GADM L2)
- 21.3 km²100.0% of basin
3 intersecting protected areas
San Luis
IUCN IVNational Wildlife Refuge
7.77 km² overlap
North Grasslands
IUCN VWildlife Area
2.26 km² overlap
Watershed Protection
2.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
514 distinct species · 2 685 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 : 30 espèces reliées par 135 interactions GloBI sur 5 types (connectance 15.7%, filtre Serrano α=0.2). 12 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°
16,5°C
Annual rain
265mm
Moisture idx (CMI)
-0,82
Runoff
78mm/an
PET
1 476mm
AET
224mm
Mean slope
0,0°
Water table
4cm
Forest
50%
Crops
42%
Urban
0%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)