HydroBASINS lev08 watershed · #7080039580
Bassin de Williams Brook
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 : New London, Suffolk
Sub-basin area
287,6km²
Upstream area
287,6km²
Discharge
6,91m³/s
Mean elev.
40m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 248.9 km²86.4% of basin
- SuffolkNew York · United States11.0 km²3.8% of basin
30 intersecting protected areas
Marine Protected Area
3.88 km² overlap
Marine Protected Area
2.97 km² overlap
Bluff Point
IUCN IIIState Park
1.63 km² overlap
State
IUCN IIIPark
1.11 km² overlap
Preserve
1.06 km² overlap
Preserve
1.06 km² overlap
Haley Farm
IUCN VIState Resource Management Area
0.81 km² overlap
N. Stonington Road
IUCN VPrivate Conservation
0.58 km² overlap
Private Conservation
0.55 km² overlap
21 more protected areassorted by overlap area
Bluff Point
IUCN VIState Resource Management Area
0.43 km² overlap
Great Oak
IUCN VPark
0.28 km² overlap
Preserve
0.27 km² overlap
Stonington Town
IUCN VPark
0.26 km² overlap
Private Conservation
0.24 km² overlap
Haley Farm
IUCN IIIState Park
0.23 km² overlap
Masons Island
IUCN VEasement
0.22 km² overlap
Marcia Woolworth Porter
IUCN VPreserve
0.17 km² overlap
North Main Street
IUCN VPrivate Conservation
0.17 km² overlap
Sandy Point
IUCN VPrivate Conservation
0.15 km² overlap
Private Conservation
0.14 km² overlap
Private Conservation
0.13 km² overlap
Anguilla
IUCN Not AssignedPreserve
0.13 km² overlap
Private Conservation
0.12 km² overlap
Town Farm
IUCN VOpen Space
0.11 km² overlap
Marine Protected Area
0.10 km² overlap
Spicer Tracts
IUCN Not AssignedConservation Easement
0.10 km² overlap
Peace Sanctury Trust 1
IUCN VPCL
0.10 km² overlap
Private Conservation
0.10 km² overlap
Williams Rd, Rear
IUCN VPrivate Conservation
0.09 km² overlap
Pawcatuck Little League
IUCN VLocal Conservation Area
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 341 distinct species · 408 658 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Williams Brook : 24 espèces reliées par 70 interactions GloBI sur 4 types (connectance 10.5%, filtre Serrano α=0.2). 13 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°
9,9°C
Annual rain
1 209mm
Moisture idx (CMI)
0,23
Runoff
773mm/an
PET
932mm
AET
768mm
Mean slope
2,4°
Water table
243cm
Forest
96%
Crops
4%
Urban
23%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)