HydroBASINS lev08 watershed · #7080449320
Bassin de Ompompanoosuc 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, Orange, Windsor
Sub-basin area
922km²
Upstream area
8 682,1km²
Discharge
176,4m³/s
Mean elev.
344m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Waits River401 km²
- Bassin de Connecticut River295 km²
3 dept-equivalent regions (GADM L2)
- Orange406.2 km²44.0% of basin
- 397.1 km²43.0% of basin
- 120.6 km²13.1% of basin
30 intersecting protected areas
Landmark Lands
IUCN VPrivate Conservation
3.85 km² overlap
Boston Lot
IUCN VReservoir
1.67 km² overlap
Stone House Farm &
IUCN Not AssignedForest
0.86 km² overlap
Appalachian Trail Tracts
IUCN VTrail
0.72 km² overlap
Reserve Program
0.63 km² overlap
Fairlee Bog
IUCN VPond
0.56 km² overlap
Slusser Tradeland
IUCN VConservation Easement
0.52 km² overlap
Zaldestani
IUCN VPCL
0.52 km² overlap
Sachem Village
IUCN VOpen Space
0.49 km² overlap
21 more protected areassorted by overlap area
Post Mills
IUCN Not AssignedNature Area
0.48 km² overlap
Mink Brook
IUCN Not AssignedConservation Easement
0.46 km² overlap
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Grafton, NH
IUCN VConservation Easement
0.42 km² overlap
Conservation Easement
0.42 km² overlap
Recreation
0.35 km² overlap
Pout Pond
IUCN Not AssignedEasement
0.27 km² overlap
Wilder Management A
IUCN VState Conservation Area
0.24 km² overlap
Mudge Riverlands
IUCN Not AssignedConservation Easement
0.24 km² overlap
Alswell Farm
IUCN Not AssignedConservation Easement
0.21 km² overlap
The Falls
IUCN VOpen Space
0.19 km² overlap
Lake Tarleton
IUCN IIIState Park
0.18 km² overlap
Post Pond
IUCN VPreserve
0.14 km² overlap
Conservation Easement
0.14 km² overlap
Harrison
IUCN Not AssignedConservation Easement
0.11 km² overlap
Chambers
IUCN VPark
0.09 km² overlap
Trail
0.07 km² overlap
Parkhill
IUCN Not AssignedConservation Easement
0.07 km² overlap
Alana Cole
IUCN VPark
0.07 km² overlap
Wetlands
0.06 km² overlap
Hypertherm
IUCN VWetlands
0.05 km² overlap
Kendal River Bank
IUCN VBuffer
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 232 distinct species · 1 131 586 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 Ompompanoosuc River : 23 espèces reliées par 82 interactions GloBI sur 4 types (connectance 13.8%, 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°
5,6°C
Annual rain
1 003mm
Moisture idx (CMI)
0,10
Runoff
584mm/an
PET
892mm
AET
702mm
Mean slope
7,7°
Water table
330cm
Forest
99%
Crops
4%
Urban
2%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)