HydroBASINS lev08 watershed · #7080015010
Bassin de North Nemah 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 1 administrative regions : Pacific
Sub-basin area
368,2km²
Upstream area
368,2km²
Discharge
20,46m³/s
Mean elev.
127m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 357.2 km²96.8% of basin
18 intersecting protected areas
Bone River
IUCN VNatural Area Preserve
11.04 km² overlap
Marine Protected Area
10.69 km² overlap
South Nemah
IUCN VNatural Resources Conservation Area
9.82 km² overlap
Wildlife Area Complex
4.49 km² overlap
Niawiakum River
IUCN VNatural Area Preserve
2.83 km² overlap
Marine Protected Area
2.39 km² overlap
Wetlands
IUCN Not AssignedReserve Program
1.85 km² overlap
Willapa
IUCN IVNational Wildlife Refuge
1.79 km² overlap
Seal Slough
IUCN Not AssignedConservation Easement
1.53 km² overlap
9 more protected areassorted by overlap area
Nemah River Estuary
IUCN VEstuary
1.06 km² overlap
Reserve Program
0.74 km² overlap
Palix River Confluence
IUCN VPrivate Conservation
0.72 km² overlap
Nemah Point
IUCN VPrivate Conservation
0.67 km² overlap
Marine Protected Area
0.58 km² overlap
Lynn Point
IUCN VPrivate Conservation
0.31 km² overlap
Clearwater Creek I-II
IUCN Not AssignedConservation Easement
0.22 km² overlap
Ellsworth Creek
IUCN VPrivate Conservation Land
0.05 km² overlap
Niawiakum River Estuary
IUCN VEstuary
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 198 distinct species · 63 511 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 North Nemah River : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 3 types (connectance 18.0%, 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°
9,4°C
Annual rain
2 395mm
Moisture idx (CMI)
0,67
Runoff
1 762mm/an
PET
798mm
AET
681mm
Mean slope
7,6°
Water table
237cm
Forest
100%
Crops
0%
Urban
0%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)