HydroBASINS lev08 watershed · #7080683710
Bassin de Santa Ana 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 3 administrative regions : Los Angeles, Riverside, San Bernardino
Sub-basin area
3 264,2km²
Upstream area
3 264,2km²
Discharge
26,08m³/s
Mean elev.
966m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 2596.7 km²79.6% of basin
- 609.0 km²18.7% of basin
- 57.6 km²1.8% of basin
30 intersecting protected areas
Sand To Snow
IUCN VNational Monument
132.82 km² overlap
San Gorgonio
IUCN IbWilderness
117.41 km² overlap
Cucamonga
IUCN IbWilderness
52.64 km² overlap
San Gabriel Mountains
IUCN VNational Monument
33.05 km² overlap
Sheep Mountain
IUCN IbWilderness
9.36 km² overlap
Norton Younglove
IUCN VReserve
7.12 km² overlap
Sycamore Canyon
IUCN VWilderness Park
5.21 km² overlap
Oak Glen
IUCN VPreserve
4.72 km² overlap
Horse Meadow
IUCN IaResearch Natural Area
3.79 km² overlap
21 more protected areassorted by overlap area
North Etiwanda Habitat
IUCN VPreserve
2.53 km² overlap
Conservation Area
IUCN VLocal Conservation Area
2.47 km² overlap
Bearpaw
IUCN VReserve
2.33 km² overlap
Local Conservation Area
1.97 km² overlap
Oak Valley
IUCN VPrivate Conservation
1.47 km² overlap
Live Oak Canyon
IUCN VOpen Space
1.37 km² overlap
Santa Ana River
IUCN VWildlife Area
1.22 km² overlap
Private Conservation
0.96 km² overlap
Mount Baldy
IUCN VWilderness Preserve
0.84 km² overlap
Lytle Creek
IUCN Not AssignedConservation Easement
0.74 km² overlap
Box Springs
IUCN VReserve
0.65 km² overlap
Baldwin Lake
IUCN VEcological Reserve
0.63 km² overlap
Sycamore Canyon
IUCN VEcological Reserve
0.54 km² overlap
Preserve
0.50 km² overlap
Orange County
IUCN VOpen Space
0.34 km² overlap
Fern Canyon
IUCN IaResearch Natural Area
0.33 km² overlap
Bluff Lake
IUCN VReserve
0.33 km² overlap
Richland
IUCN VMitigation
0.24 km² overlap
Reserve
0.22 km² overlap
San Timoteo Canyon
IUCN VOpen Space
0.16 km² overlap
Teledyne
IUCN VLocal Conservation Area
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 008 distinct species · 2 066 661 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Santa Ana River : 22 espèces reliées par 61 interactions GloBI sur 4 types (connectance 13.1%, filtre Serrano α=0.2). 9 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°
14,7°C
Annual rain
505mm
Moisture idx (CMI)
-0,62
Runoff
176mm/an
PET
1 410mm
AET
414mm
Mean slope
9,1°
Water table
488cm
Forest
44%
Crops
4%
Urban
43%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)