HydroBASINS lev08 watershed · #7080041500
Bassin de Western Branch Corrotoman 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 6 administrative regions : King George, Lancaster, Northumberland, Richmond, Stafford +1
Sub-basin area
2 130,8km²
Upstream area
2 130,8km²
Discharge
1,11m³/s
Mean elev.
26m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- Northumberland525.1 km²24.6% of basin
- Westmoreland446.4 km²20.9% of basin
- Lancaster361.3 km²16.9% of basin
- 291.0 km²13.6% of basin
- Stafford235.4 km²11.0% of basin
- Richmond129.2 km²6.1% of basin
29 intersecting protected areas
Chesapeake Bay Estuarine Complex
IUCN Not ReportedWetland of International Importance (Ramsar Site)
190.16 km² overlap
Crow's Nest
IUCN VState Natural Area Preserve
11.62 km² overlap
Caledon
IUCN IIIState Park
10.41 km² overlap
Caledon Natural Area
IUCN VMarine Protected Area
10.40 km² overlap
Westmoreland
IUCN IIIState Park
5.37 km² overlap
Marine Protected Area
4.48 km² overlap
Chotank
IUCN VState Natural Area Preserve
4.48 km² overlap
Rappahannock River Valley
IUCN IVNational Wildlife Refuge
4.40 km² overlap
Marine Protected Area
2.94 km² overlap
20 more protected areassorted by overlap area
The Nature Conservancy
IUCN VEasement
2.58 km² overlap
George Washington Birthplace
IUCN IIINational Monument
2.25 km² overlap
Marine Protected Area
1.27 km² overlap
Dameron Marsh
IUCN VState Natural Area Preserve
1.27 km² overlap
Easement
1.05 km² overlap
Num-Vof-4009
IUCN Not AssignedConservation Easement
1.03 km² overlap
Hickory Hollow
IUCN VState Natural Area Preserve
1.02 km² overlap
Num-Vof-4013
IUCN Not AssignedConservation Easement
0.91 km² overlap
Marine Protected Area
0.82 km² overlap
Hughlett Point
IUCN VState Natural Area Preserve
0.82 km² overlap
Num-Vof-4011
IUCN Not AssignedConservation Easement
0.57 km² overlap
Num-Vof-4006
IUCN Not AssignedConservation Easement
0.48 km² overlap
Crows N
IUCN VNon-Profit Fee-Simple Holding
0.46 km² overlap
Bush Mill Stream
IUCN VState Natural Area Preserve
0.42 km² overlap
Marine Protected Area
0.42 km² overlap
Reserve Program
0.42 km² overlap
Rmd-03978
IUCN Not AssignedConservation Easement
0.31 km² overlap
VOF Holding
IUCN VLocal Land Trust Land
0.28 km² overlap
Reserve Program
0.08 km² overlap
Reserve Program
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 857 distinct species · 391 033 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Western Branch Corrotoman River : 20 espèces reliées par 66 interactions GloBI sur 3 types (connectance 14.2%, 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°
14,0°C
Annual rain
1 058mm
Moisture idx (CMI)
-0,08
Runoff
418mm/an
PET
1 145mm
AET
851mm
Mean slope
1,3°
Water table
60cm
Forest
97%
Crops
26%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)