HydroBASINS lev08 watershed · #5080047720
Bassin de Sepik 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 : Angoram, Middle Ramu, Wewak
Sub-basin area
2 368,9km²
Upstream area
80 131,2km²
Discharge
3 817,65m³/s
Mean elev.
23m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Nagam River2272 km²
- Bassin de Sepik River1 km²
3 dept-equivalent regions (GADM L2)
- 2286.6 km²96.9% of basin
- 38.2 km²1.6% of basin
- Middle RamuMadang · Papua New Guinea33.7 km²1.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
503 distinct species · 4 645 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 Sepik River : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 30 interactions GloBI sur 4 types (connectance 8.5%, filtre Serrano α=0.2). 4 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°
26,8°C
Annual rain
2 301mm
Moisture idx (CMI)
0,24
Runoff
1 500mm/an
PET
1 717mm
AET
1 540mm
Mean slope
0,7°
Water table
21cm
Forest
36%
Crops
6%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)