HydroBASINS lev08 watershed · #7080013260
Bassin de San Lorenzo 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 : San Francisco, San Mateo, Santa Clara, Santa Cruz
Sub-basin area
2 546,9km²
Upstream area
2 546,9km²
Discharge
0,01m³/s
Mean elev.
217m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 1168.2 km²45.8% of basin
- Santa Cruz906.1 km²35.6% of basin
- 277.2 km²10.9% of basin
- 122.9 km²4.8% of basin
30 intersecting protected areas
Marine Protected Area
131.63 km² overlap
Golden Gate
IUCN VNational Recreation Area
36.56 km² overlap
Filice Ranch
IUCN VPrivate Conservation
36.15 km² overlap
Marine Protected Area
28.82 km² overlap
La Honda Creek Open Spac
IUCN VOpen Space
25.32 km² overlap
Marine Protected Area
24.52 km² overlap
California Coastal
IUCN VNational Monument
23.49 km² overlap
Private Conservation
23.15 km² overlap
National Wildlife Refuge
20.34 km² overlap
21 more protected areassorted by overlap area
Open Space
19.91 km² overlap
Russian Ridge Open Spac
IUCN VOpen Space
14.08 km² overlap
Monte Bello Open Spac
IUCN VOpen Space
13.56 km² overlap
Open Space
11.22 km² overlap
Open Space
9.84 km² overlap
Long Ridge Open Spac
IUCN VOpen Space
8.75 km² overlap
Skyline Ridge Open Spac
IUCN VOpen Space
8.24 km² overlap
Bair Island
IUCN VEcological Reserve
8.12 km² overlap
Marine Protected Area
7.82 km² overlap
Tunitas Creek Open Spac
IUCN VOpen Space
6.60 km² overlap
Open Space
6.55 km² overlap
Private Conservation
6.29 km² overlap
Saratoga Gap OSP
IUCN Not AssignedConservation Easement
6.11 km² overlap
Baylands
IUCN VPreserve
6.06 km² overlap
Windy Hill Open Spac
IUCN VOpen Space
5.56 km² overlap
MROSD Easement Over Land Trust
IUCN Not AssignedEasement
5.14 km² overlap
Audubon Society
IUCN VPrivate Conservation
4.56 km² overlap
Jasper Ridge
IUCN VReserve
4.43 km² overlap
Marine Protected Area
4.05 km² overlap
Toto Ranch
IUCN Not AssignedConservation Easement
3.76 km² overlap
Sierra Azul OSP
IUCN Not AssignedConservation Easement
3.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
16 113 distinct species · 11 696 396 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 San Lorenzo River : 20 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 65 interactions GloBI sur 3 types (connectance 14.0%, 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°
13,4°C
Annual rain
724mm
Moisture idx (CMI)
-0,32
Runoff
307mm/an
PET
1 072mm
AET
542mm
Mean slope
8,7°
Water table
394cm
Forest
67%
Crops
4%
Urban
28%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)