HydroBASINS lev08 watershed · #4080046880
Bassin de 大安溪
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 : Hsinchu County, Miaoli, Taichung
Sub-basin area
780,3km²
Upstream area
780,3km²
Discharge
28,05m³/s
Mean elev.
1 438m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 601.9 km²77.3% of basin
- 167.0 km²21.5% of basin
- 9.5 km²1.2% of basin
8 intersecting protected areas
Shei-pa
IUCN IINational Park
394.70 km² overlap
Xue-ba
IUCN Not ReportedForest Reserve
119.51 km² overlap
Syue-shan-keng River
IUCN IVMajor Wildlife Habitat
6.73 km² overlap
Major Wildlife Habitat
2.53 km² overlap
Miaoli Sanyi Huoyanshan
IUCN IaNature Reserve
1.41 km² overlap
Wildlife Refuge
0.59 km² overlap
Major Wildlife Habitat
0.59 km² overlap
Ci-lan
IUCN IVMajor Wildlife Habitat
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 032 distinct species · 264 682 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 大安溪 : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 22 interactions GloBI sur 2 types (connectance 6.8%, 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°
15,1°C
Annual rain
2 605mm
Moisture idx (CMI)
0,60
Runoff
1 192mm/an
PET
996mm
AET
954mm
Mean slope
22,3°
Water table
669cm
Forest
76%
Crops
7%
Urban
8%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)