HydroBASINS lev08 watershed · #8080121560
Bassin de Middle Fork Koyukuk 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 : Yukon-Koyukuk
Sub-basin area
295,1km²
Upstream area
2 212,9km²
Discharge
13,67m³/s
Mean elev.
726m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Robert Creek996 km²
- Bassin de Dietrich River922 km²
1 dept-equivalent regions (GADM L2)
- 297.2 km²100.0% of basin
2 intersecting protected areas
Gates of the Arctic
IUCN VNational Preserve
59.56 km² overlap
Gates of the Arctic
IUCN IbWilderness Area
59.53 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
224 distinct species · 528 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Middle Fork Koyukuk River : 25 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 100 interactions GloBI sur 5 types (connectance 11.6%, filtre Serrano α=0.2). 17 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°
-9,3°C
Annual rain
277mm
Moisture idx (CMI)
-0,35
Runoff
274mm/an
PET
429mm
AET
252mm
Mean slope
17,0°
Water table
350cm
Forest
0%
Crops
0%
Urban
0%
Protected
97%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)