HydroBASINS lev08 watershed · #7080455700
Bassin de Sugar 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 3 administrative regions : Grafton, Merrimack, Sullivan
Sub-basin area
712,2km²
Upstream area
712,4km²
Discharge
13,01m³/s
Mean elev.
387m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Sullivan634.9 km²89.0% of basin
- 65.4 km²9.2% of basin
- 13.3 km²1.9% of basin
24 intersecting protected areas
Dobles Tract
IUCN VState Conservation Area
0.40 km² overlap
Thurber
IUCN Not AssignedMemorial Forest
0.34 km² overlap
John Hay
IUCN IVNational Wildlife Refuge
0.32 km² overlap
Phillips Memorial
IUCN VPreserve
0.29 km² overlap
Frank And Dot Gordon
IUCN VConservation Easement
0.19 km² overlap
Jillette Property
IUCN Not AssignedConservation Easement
0.19 km² overlap
Eastman
IUCN VForest
0.17 km² overlap
Lincoln Gordon
IUCN VConservation Easement
0.16 km² overlap
Lucius Smith Lot
IUCN Not AssignedConservation Easement
0.13 km² overlap
15 more protected areassorted by overlap area
Gordon
IUCN VConservation Easement
0.09 km² overlap
Stanley Point Trust
IUCN Not AssignedConservation Easement
0.07 km² overlap
Cordingley
IUCN VPreserve
0.06 km² overlap
Collins Lot
IUCN VLocal Conservation Area
0.05 km² overlap
Albert Tilton
IUCN VLocal Conservation Area
0.05 km² overlap
Verne Morse Lot
IUCN VLocal Conservation Area
0.05 km² overlap
Evergreen Point
IUCN VPrivate Conservation
0.04 km² overlap
Philbrick-Cricenti Bog
IUCN Not AssignedLocal Other or Unknown
0.03 km² overlap
Local Conservation Area
0.03 km² overlap
Conservation Easement
0.02 km² overlap
Birch Point Circle
IUCN VLocal Conservation Area
0.02 km² overlap
Parkhurst
IUCN Not AssignedEasement
0.01 km² overlap
Kentlands Boathouse
IUCN VConservation Easement
0.01 km² overlap
Reserve Program
0.01 km² overlap
Pond
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 364 distinct species · 211 870 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Sugar River : 27 espèces reliées par 128 interactions GloBI sur 4 types (connectance 12.9%, filtre Serrano α=0.2). 18 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°
6,1°C
Annual rain
1 076mm
Moisture idx (CMI)
0,16
Runoff
579mm/an
PET
902mm
AET
726mm
Mean slope
5,9°
Water table
332cm
Forest
96%
Crops
3%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)