HydroBASINS lev08 watershed · #7080013620
Bassin de Sonoma 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 5 administrative regions : Marin, Napa, San Francisco, Solano, Sonoma
Sub-basin area
2 478,4km²
Upstream area
2 478,4km²
Discharge
0,23m³/s
Mean elev.
124m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 1367.2 km²55.1% of basin
- 1009.1 km²40.7% of basin
- 18.5 km²0.7% of basin
- 3.1 km²0.1% of basin
- 0.6 km²0.0% of basin
30 intersecting protected areas
Marine Protected Area
269.99 km² overlap
Point Reyes
IUCN VNational Seashore
234.29 km² overlap
Marine Protected Area
165.82 km² overlap
Phillip Burton
IUCN IbWilderness Area
118.99 km² overlap
Golden Gate
IUCN VNational Recreation Area
102.95 km² overlap
San Pablo Bay
IUCN IVNational Wildlife Refuge
35.20 km² overlap
Marine Protected Area
33.64 km² overlap
Marine Protected Area
31.93 km² overlap
Petaluma Marsh
IUCN VWildlife Area
17.89 km² overlap
21 more protected areassorted by overlap area
MALT Agricultural Conservation Easement #03
IUCN Not AssignedConservation Easement
9.90 km² overlap
MALT Agricultural Conservation Easement #43
IUCN Not AssignedConservation Easement
9.40 km² overlap
MALT Agricultural Conservation Easement #04
IUCN Not AssignedConservation Easement
6.97 km² overlap
Tolay Creek Riparian
IUCN Not AssignedConservation Easement
6.88 km² overlap
Lucas Valley Open Spac
IUCN VOpen Space
6.78 km² overlap
Napa-Sonoma Marshes
IUCN VWildlife Area
6.64 km² overlap
Mount Burdell Open Spac
IUCN VOpen Space
6.58 km² overlap
Marine Protected Area
6.37 km² overlap
Gary Giacomini Open Spac
IUCN VOpen Space
6.18 km² overlap
MALT Agricultural Conservation Easement #11
IUCN Not AssignedConservation Easement
6.01 km² overlap
MALT Agricultural Conservation Easement #02
IUCN Not AssignedConservation Easement
5.94 km² overlap
MALT Agricultural Conservation Easement #47
IUCN Not AssignedConservation Easement
5.24 km² overlap
Regional Park
5.22 km² overlap
MALT Agricultural Conservation Easement #29
IUCN Not AssignedConservation Easement
5.04 km² overlap
Open Space
5.03 km² overlap
MALT Agricultural Conservation Easement #34
IUCN Not AssignedConservation Easement
5.03 km² overlap
MALT Agricultural Conservation Easement #07
IUCN Not AssignedConservation Easement
4.72 km² overlap
Marine Protected Area
4.72 km² overlap
Bolinas Lagoon Open Spac
IUCN VOpen Space
4.48 km² overlap
Open Space
4.38 km² overlap
MALT Agricultural Conservation Easement #36
IUCN Not AssignedConservation Easement
4.38 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 526 distinct species · 6 265 288 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 Sonoma Creek : 17 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 62 interactions GloBI sur 2 types (connectance 15.3%, 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°
13,6°C
Annual rain
936mm
Moisture idx (CMI)
-0,18
Runoff
570mm/an
PET
1 156mm
AET
595mm
Mean slope
7,5°
Water table
344cm
Forest
53%
Crops
17%
Urban
10%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)