HydroBASINS lev08 watershed · #7080012490
Bassin de San Juan Creek
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 : Orange, Riverside, San Diego
Sub-basin area
1 663,5km²
Upstream area
1 663,5km²
Discharge
0m³/s
Mean elev.
296m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- Orange1036.4 km²62.3% of basin
- 390.0 km²23.5% of basin
- 216.0 km²13.0% of basin
30 intersecting protected areas
San Mateo Canyon
IUCN IbWilderness
161.18 km² overlap
Ronald W. Caspers
IUCN VWilderness Park
32.18 km² overlap
Laguna Coast
IUCN VWilderness Park
23.95 km² overlap
Aliso and Wood Canyons
IUCN VWilderness Park
17.35 km² overlap
Starr Ranch
IUCN VPrivate Conservation
15.47 km² overlap
Whiting Ranch
IUCN VWilderness Park
6.66 km² overlap
Marine Protected Area
3.22 km² overlap
Marine Protected Area
2.39 km² overlap
Thomas F. Riley
IUCN VWilderness Park
2.22 km² overlap
21 more protected areassorted by overlap area
Reserve
2.05 km² overlap
Upper Newport Bay
IUCN VEcological Reserve
2.05 km² overlap
Marine Protected Area
1.96 km² overlap
Marine Protected Area
1.66 km² overlap
Santa Rosa Plateau
IUCN VEcological Reserve
1.33 km² overlap
Buck Gully
IUCN VReserve
1.20 km² overlap
Saddle Creek
IUCN VPrivate Conservation
1.16 km² overlap
Marine Protected Area
1.04 km² overlap
Margarita Peak
IUCN VPreserve
0.87 km² overlap
Niguel Marine Life Refuge
IUCN IVMarine Protected Area
0.80 km² overlap
Mountain
IUCN Not AssignedPark
0.79 km² overlap
Wildlife Corridor
0.68 km² overlap
Marine Protected Area
0.66 km² overlap
Fremont Canyon
IUCN VNature Preserve
0.62 km² overlap
Upper Newport Bay
IUCN VNature Preserve
0.57 km² overlap
Marine Protected Area
0.42 km² overlap
Wilderness Glen
IUCN VPark
0.37 km² overlap
Marine Protected Area
0.34 km² overlap
Open Space
0.33 km² overlap
Laguna Laurel
IUCN VEcological Reserve
0.32 km² overlap
Marine Protected Area
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 454 distinct species · 3 875 428 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 San Juan Creek : 28 espèces reliées par 82 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 11 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°
16,3°C
Annual rain
374mm
Moisture idx (CMI)
-0,71
Runoff
100mm/an
PET
1 275mm
AET
318mm
Mean slope
7,8°
Water table
521cm
Forest
53%
Crops
3%
Urban
37%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)