HydroBASINS lev08 watershed · #7080470950
Bassin de Nashua 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 : Hillsborough, Middlesex, Worcester
Sub-basin area
1 437,7km²
Upstream area
1 437,7km²
Discharge
29,49m³/s
Mean elev.
177m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Worcester838.8 km²58.3% of basin
- 326.2 km²22.7% of basin
- Hillsborough275.0 km²19.1% of basin
30 intersecting protected areas
Oxbow
IUCN IVNational Wildlife Refuge
6.89 km² overlap
Fitchburg Watershed WCE
IUCN Not AssignedWatershed
6.81 km² overlap
Pearl Hill
IUCN VState Forest
5.40 km² overlap
Groton Town Forest WCE
IUCN Not AssignedTown Forest
2.08 km² overlap
Wekepeke WCE
IUCN Not AssignedConservation Easement
2.06 km² overlap
Rocky Hill
IUCN Not AssignedWildlife Sanctuary
1.58 km² overlap
Flat Rock
IUCN VWildlife Sanctuary
1.33 km² overlap
Squannacook Brook
IUCN VIState Forest
1.20 km² overlap
Cournoyer
IUCN Not AssignedConservation Easement
1.16 km² overlap
21 more protected areassorted by overlap area
Squannacook River WCE
IUCN Not AssignedConservation Easement
1.09 km² overlap
Northwest
IUCN VConservation Land
1.01 km² overlap
Hartshorn CR
IUCN Not AssignedConservation Easement
0.85 km² overlap
Mdfa Cr
IUCN Not AssignedConservation Easement
0.83 km² overlap
Valley Farm
IUCN Not AssignedWildlife Sanctuary
0.73 km² overlap
Pepperell Springs Wce
IUCN VLocal Conservation Area
0.73 km² overlap
Surrenden Farm West WCE
IUCN Not AssignedConservation Easement
0.72 km² overlap
Throne Hill Wce
IUCN VLocal Conservation Area
0.71 km² overlap
Fitchburg Reservoir Project CR
IUCN Not AssignedReservoir
0.68 km² overlap
Sholan Farms
IUCN Not AssignedConservation Easement
0.67 km² overlap
Wiita Farm
IUCN Not AssignedConservation Area
0.66 km² overlap
Susan B. Minns
IUCN VSanctuary
0.60 km² overlap
Surrenden Farm Cr
IUCN VLocal Conservation Area
0.59 km² overlap
Simonds Road CR
IUCN Not AssignedConservation Easement
0.59 km² overlap
Pine Meadow
IUCN VConservation Area
0.52 km² overlap
Wright Pond WCE
IUCN Not AssignedPond
0.49 km² overlap
Whitmanville WCE
IUCN Not AssignedConservation Easement
0.48 km² overlap
J. Harry Rich
IUCN Not AssignedState Forest
0.47 km² overlap
Fritz & Helen Walker Conservation Area CR
IUCN Not AssignedConservation Area
0.43 km² overlap
Keyes Farm CR
IUCN Not AssignedConservation Easement
0.41 km² overlap
Muschopauge Brook Project
IUCN Not AssignedConservation Easement
0.40 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 044 distinct species · 1 241 492 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Nashua River : 27 espèces reliées par 93 interactions GloBI sur 4 types (connectance 12.6%, 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°
8,0°C
Annual rain
1 142mm
Moisture idx (CMI)
0,16
Runoff
703mm/an
PET
954mm
AET
757mm
Mean slope
3,0°
Water table
342cm
Forest
91%
Crops
6%
Urban
13%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)