HydroBASINS lev08 watershed · #5080143460
Bassin de Sungai Siak
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 : Kampar, Pekanbaru, Pelalawan, Siak
Sub-basin area
1 726,8km²
Upstream area
6 290,3km²
Discharge
261,45m³/s
Mean elev.
29m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sungai Tapung Kanan2290 km²
- Bassin de Sungai Tapung Kiri2274 km²
4 dept-equivalent regions (GADM L2)
- 969.7 km²56.4% of basin
- 576.6 km²33.5% of basin
- 116.6 km²6.8% of basin
- 56.1 km²3.3% of basin
1 intersecting protected areas
Sultan Syarif Kasim (Minas)
IUCN VIGrand Forest Park
49.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
601 distinct species · 3 422 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Sungai Siak : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 3 types (connectance 5.0%, filtre Serrano α=0.2). 3 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
2 641mm
Moisture idx (CMI)
0,35
Runoff
1 181mm/an
PET
1 723mm
AET
1 688mm
Mean slope
1,2°
Water table
26cm
Forest
9%
Crops
50%
Urban
21%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)