HydroBASINS lev08 watershed · #7080440510
Bassin de Saco 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 : Carroll, Coos, Grafton
Sub-basin area
683,8km²
Upstream area
683,9km²
Discharge
37,43m³/s
Mean elev.
587m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- Carroll483.3 km²70.5% of basin
- 123.8 km²18.1% of basin
- 78.0 km²11.4% of basin
14 intersecting protected areas
Presidential Range-Dry River
IUCN IbWilderness
111.68 km² overlap
Green Hills
IUCN VPreserve
7.07 km² overlap
Nancy Brook
IUCN IIINational Natural Landmark
6.32 km² overlap
Nancy Brook
IUCN IaResearch Natural Area
6.32 km² overlap
Wildcat, New Hampshire
IUCN VWild and Scenic River
5.75 km² overlap
Wild River
IUCN IbWilderness
3.79 km² overlap
Pemigewasset
IUCN IbWilderness
1.67 km² overlap
Cathedral Ledge
IUCN IIIState Park
1.07 km² overlap
Echo Lake
IUCN IIIState Park
0.58 km² overlap
5 more protected areassorted by overlap area
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Carroll, NH
IUCN VConservation Easement
0.49 km² overlap
Reserve Program
0.26 km² overlap
Humphrey's Ledge
IUCN VNatural Area
0.17 km² overlap
National Forest
0.10 km² overlap
Saco River
IUCN Not AssignedConservation Easement
0.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 045 distinct species · 185 316 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Saco River : 30 espèces reliées par 112 interactions GloBI sur 4 types (connectance 11.8%, filtre Serrano α=0.2). 14 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°
4,2°C
Annual rain
1 351mm
Moisture idx (CMI)
0,39
Runoff
1 297mm/an
PET
812mm
AET
722mm
Mean slope
12,0°
Water table
364cm
Forest
99%
Crops
1%
Urban
0%
Protected
44%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)