HydroBASINS lev08 watershed · #7080474430
Bassin de Assabet 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 2 administrative regions : Middlesex, Worcester
Sub-basin area
1 079,7km²
Upstream area
1 079,7km²
Discharge
26,19m³/s
Mean elev.
84m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 824.0 km²76.2% of basin
- Worcester257.5 km²23.8% of basin
30 intersecting protected areas
Great Meadows
IUCN IVNational Wildlife Refuge
15.59 km² overlap
Assabet River
IUCN IVNational Wildlife Refuge
9.54 km² overlap
Wayne F. Maccallum
IUCN VState Conservation Area
3.32 km² overlap
Conservation Area
IUCN Not AssignedConservation Easement
1.42 km² overlap
Nobscot Scout Reservation CR
IUCN Not AssignedReservation
1.23 km² overlap
Unknown
IUCN VPark
1.10 km² overlap
Huckins Farm CR
IUCN Not AssignedConservation Easement
0.94 km² overlap
Nashoba Brook
IUCN VWildlife Sanctuary
0.88 km² overlap
Emerson Cr
IUCN Not AssignedConservation Easement
0.64 km² overlap
21 more protected areassorted by overlap area
Phillips Cr 4
IUCN Not AssignedConservation Easement
0.62 km² overlap
Fruit Street Water Department Land CR
IUCN Not AssignedConservation Easement
0.60 km² overlap
Emerson / Monument Street Cr
IUCN Not AssignedMonument
0.54 km² overlap
Whisper Way
IUCN VConservation Area
0.53 km² overlap
Nashoba Brook
IUCN Not AssignedWildlife Sanctuary
0.48 km² overlap
Stillmeadow Farm CR
IUCN Not AssignedConservation Easement
0.48 km² overlap
Concord Farms Cr
IUCN VLocal Conservation Area
0.47 km² overlap
Farrar
IUCN Not AssignedPond
0.45 km² overlap
Chestnut Hill Farm
IUCN VLocal Conservation Area
0.43 km² overlap
Century Mill CR
IUCN Not AssignedConservation Easement
0.41 km² overlap
Elmwood Farm CR
IUCN Not AssignedConservation Easement
0.37 km² overlap
Hamlen Homes Farm Cr
IUCN Not AssignedConservation Easement
0.37 km² overlap
Bay Circuit
IUCN Not AssignedTrail
0.37 km² overlap
Sedge Meadow
IUCN VLocal Conservation Area
0.36 km² overlap
Punktasset
IUCN VLocal Conservation Area
0.36 km² overlap
Pantry Brook Farm CR
IUCN Not AssignedConservation Easement
0.35 km² overlap
Riverbridge North CR
IUCN Not AssignedConservation Easement
0.35 km² overlap
Cedar Hill Cr
IUCN VLocal Conservation Area
0.35 km² overlap
Welch
IUCN VReservation
0.34 km² overlap
Emerald Hills East
IUCN Not AssignedConservation Easement
0.33 km² overlap
Garfield Woods
IUCN VPCL
0.33 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 011 distinct species · 2 554 587 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 Assabet River : 26 espèces reliées par 68 interactions GloBI sur 4 types (connectance 10.8%, filtre Serrano α=0.2). 10 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°
8,9°C
Annual rain
1 138mm
Moisture idx (CMI)
0,14
Runoff
780mm/an
PET
979mm
AET
759mm
Mean slope
2,2°
Water table
149cm
Forest
83%
Crops
3%
Urban
43%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)