HydroBASINS lev08 watershed · #4080761540
Bassin de 大川河
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 : Chengdu, Ngawa Tibetan and Qiang, Ya'an
Sub-basin area
1 389km²
Upstream area
1 389km²
Discharge
37,58m³/s
Mean elev.
2 010m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1209.7 km²87.2% of basin
- 176.1 km²12.7% of basin
- 1.7 km²0.1% of basin
2 intersecting protected areas
Sichuan Giant Panda Sanctuaries - Wolong, Mt Siguniang and Jiajin Mountains
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
665.00 km² overlap
Wolong Nature Reserve
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
705 distinct species · 2 234 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 大川河 : 26 espèces reliées par 33 interactions GloBI sur 6 types (connectance 6.7%, filtre Serrano α=0.2). 6 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°
10,9°C
Annual rain
1 153mm
Moisture idx (CMI)
0,18
Runoff
826mm/an
PET
935mm
AET
803mm
Mean slope
24,4°
Water table
774cm
Forest
35%
Crops
16%
Urban
2%
Protected
33%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)