HydroBASINS lev08 watershed · #7080454690
Bassin de Pemigewasset 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 5 administrative regions : Belknap, Carroll, Grafton, Merrimack, Sullivan
Sub-basin area
2 677,2km²
Upstream area
2 677,2km²
Discharge
66,64m³/s
Mean elev.
456m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 2161.4 km²80.6% of basin
- 209.4 km²7.8% of basin
- 206.5 km²7.7% of basin
- Carroll95.7 km²3.6% of basin
- Sullivan9.5 km²0.4% of basin
30 intersecting protected areas
Pemigewasset
IUCN IbWilderness
182.85 km² overlap
Sandwich Range
IUCN IbWilderness
44.03 km² overlap
Green Acre Woodlands
IUCN VConservation Easement
13.54 km² overlap
Burleigh
IUCN VPCL
6.61 km² overlap
Cardigan
IUCN VPCL
4.66 km² overlap
Reserve Program
3.42 km² overlap
Knox Mountian Tree Farm
IUCN VPrivate Conservation
2.88 km² overlap
Witte
IUCN VForest Management Area
2.41 km² overlap
DeJeager
IUCN VPrivate Conservation
2.31 km² overlap
21 more protected areassorted by overlap area
Ness
IUCN VPrivate Conservation
1.87 km² overlap
Beale (Upper)
IUCN VPrivate Conservation
1.67 km² overlap
Stitzinger
IUCN VPrivate Conservation
1.55 km² overlap
Wiggin - Red Hill
IUCN VConservation Area
1.18 km² overlap
College
1.11 km² overlap
Private Conservation
1.07 km² overlap
Issacs
IUCN VEasement
0.83 km² overlap
PCL
0.78 km² overlap
Pinehurst
IUCN VPCL
0.71 km² overlap
Frazian
IUCN VConservation Easement
0.71 km² overlap
Eastman Brown
IUCN VConservation Easement
0.70 km² overlap
Stinson Mountain
IUCN VPreserve
0.55 km² overlap
Armstrong
IUCN VNatural Area
0.54 km² overlap
Coolidge Land
IUCN VPrivate Conservation
0.53 km² overlap
Lost River
IUCN VReservation
0.50 km² overlap
Ragged Mountain Tract
IUCN VState Conservation Area
0.46 km² overlap
Levi Smith
IUCN VConservation Area
0.43 km² overlap
Land Exchange Tracts 1-6
IUCN VState Conservation Area
0.40 km² overlap
Gallup
IUCN VPrivate Conservation
0.38 km² overlap
Metalf
IUCN VPreserve
0.34 km² overlap
Belknap Woods
IUCN VConservation Easement
0.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 167 distinct species · 410 004 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Pemigewasset River : 22 espèces reliées par 89 interactions GloBI sur 4 types (connectance 13.4%, filtre Serrano α=0.2). 15 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°
5,1°C
Annual rain
1 162mm
Moisture idx (CMI)
0,24
Runoff
789mm/an
PET
865mm
AET
722mm
Mean slope
9,3°
Water table
341cm
Forest
97%
Crops
2%
Urban
0%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)