HydroBASINS lev08 watershed · #5080017910
Bassin de Batang Igan
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 4 administrative regions : Dalat, Matu, Selangau, Sibu
Sub-basin area
1 425,9km²
Upstream area
1 425,9km²
Discharge
114,06m³/s
Mean elev.
25m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 654.9 km²46.1% of basin
- 580.6 km²40.9% of basin
- 173.7 km²12.2% of basin
- 10.2 km²0.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
198 distinct species · 482 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Batang Igan : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 28 interactions GloBI sur 4 types (connectance 4.7%, filtre Serrano α=0.2). 5 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°
26,9°C
Annual rain
3 276mm
Moisture idx (CMI)
0,50
Runoff
2 149mm/an
PET
1 652mm
AET
1 652mm
Mean slope
0,9°
Water table
20cm
Forest
56%
Crops
24%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)