HydroBASINS lev08 watershed · #7080577150
Bassin de Mark West 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 2 administrative regions : Napa, Sonoma
Sub-basin area
655,9km²
Upstream area
656,1km²
Discharge
14,26m³/s
Mean elev.
153m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 656.0 km²99.9% of basin
- 0.3 km²0.1% of basin
30 intersecting protected areas
Laguna de Santa Rosa Wetland Complex
IUCN Not ReportedWetland of International Importance (Ramsar Site)
19.25 km² overlap
Pepperwood Ranch
IUCN VNatural Preserve
4.70 km² overlap
Regional Park
4.37 km² overlap
Open Space
3.95 km² overlap
Ecological Reserve
3.40 km² overlap
Regional Park
2.95 km² overlap
Laguna Farms
IUCN Not AssignedConservation Easement
2.42 km² overlap
Stein
IUCN Not AssignedConservation Easement
2.36 km² overlap
Regional Park
2.31 km² overlap
21 more protected areassorted by overlap area
Laguna Farms (Kelly)
IUCN Not AssignedConservation Easement
1.91 km² overlap
Laguna
IUCN VWildlife Area
1.87 km² overlap
Geary Ranch
IUCN Not AssignedConservation Easement
1.69 km² overlap
Fairfield Osborn
IUCN VPreserve
1.42 km² overlap
Carinalli
IUCN Not AssignedConservation Easement
1.06 km² overlap
Balletto
IUCN Not AssignedConservation Easement
1.02 km² overlap
Easement
0.84 km² overlap
Sanctuary
0.77 km² overlap
Morelli
IUCN Not AssignedConservation Easement
0.71 km² overlap
Santa Rosa Creek Headwaters
IUCN Not AssignedConservation Easement
0.68 km² overlap
Danielli
IUCN Not AssignedConservation Easement
0.68 km² overlap
Quailbrook Ranch
IUCN Not AssignedConservation Easement
0.65 km² overlap
Nunes
IUCN VLocal Conservation Area
0.44 km² overlap
Alexander
IUCN Not AssignedConservation Easement
0.36 km² overlap
Dashiell/Molle
IUCN Not AssignedConservation Easement
0.35 km² overlap
Carinalli Todd Road
IUCN Not AssignedRoad Mitigation
0.34 km² overlap
Todd Raod
IUCN Not AssignedConservation Easement
0.26 km² overlap
Tuxhorn Ranch
IUCN Not AssignedConservation Easement
0.24 km² overlap
Meadowlark
IUCN Not AssignedField
0.23 km² overlap
Oak Farm
IUCN Not AssignedConservation Easement
0.21 km² overlap
Bath/Watt
IUCN VLocal Conservation Area
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 351 distinct species · 919 595 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Mark West Creek : 29 espèces reliées par 88 interactions GloBI sur 4 types (connectance 11.3%, 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°
13,9°C
Annual rain
967mm
Moisture idx (CMI)
-0,24
Runoff
630mm/an
PET
1 280mm
AET
616mm
Mean slope
5,0°
Water table
255cm
Forest
67%
Crops
18%
Urban
28%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)