HydroBASINS lev08 watershed · #7080431620
Bassin de Connecticut 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 4 administrative regions : Caledonia, Coos, Essex, Grafton
Sub-basin area
1 160,7km²
Upstream area
4 207,1km²
Discharge
94,86m³/s
Mean elev.
437m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Connecticut River2399 km²
- Bassin de Upper Ammonoosuc River647 km²
4 dept-equivalent regions (GADM L2)
- 640.9 km²55.1% of basin
- Essex344.0 km²29.6% of basin
- 108.3 km²9.3% of basin
- 69.9 km²6.0% of basin
16 intersecting protected areas
Wildlife Refuge
26.20 km² overlap
Conservation Easement
2.85 km² overlap
Great Guildhall Swamp
IUCN VPrivate Conservation Land
1.56 km² overlap
Kilkenny Matrix Fee
IUCN VPrivate Conservation Land
0.84 km² overlap
Great Guildhall Swamp
IUCN VEasement
0.77 km² overlap
Concord Woods
IUCN VIState Resource Management Area
0.45 km² overlap
Sheridan Mountain
IUCN VNatural Area
0.42 km² overlap
Reserve Program
0.35 km² overlap
Maidstone Bends
IUCN VPrivate Conservation Land
0.35 km² overlap
7 more protected areassorted by overlap area
Reserve Program
0.17 km² overlap
Christie
IUCN VConservation Easement
0.15 km² overlap
West Mountain
IUCN VWildlife Management Area
0.12 km² overlap
Sheridan Mountain
IUCN VPrivate Conservation Land
0.04 km² overlap
Private Conservation Land
0.02 km² overlap
Maidstone Bends
IUCN VPrivate Conservation Land
0.02 km² overlap
Ackerman
IUCN VPrivate Conservation
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 198 distinct species · 227 907 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 Connecticut River : 20 espèces reliées par 56 interactions GloBI sur 3 types (connectance 12.9%, 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°
4,6°C
Annual rain
1 084mm
Moisture idx (CMI)
0,20
Runoff
907mm/an
PET
854mm
AET
706mm
Mean slope
6,6°
Water table
210cm
Forest
96%
Crops
1%
Urban
0%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)