HydroBASINS lev08 watershed · #4080847220
Bassin de Drangme Chhu
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 8 administrative regions across 2 countries : Bartsham, Bidung, Khamdang, Phongmed, Ramjar +3
Sub-basin area
161,8km²
Upstream area
6 863,1km²
Discharge
38,76m³/s
Mean elev.
2 099m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 娘姆江曲 Nyamjang Chu788 km²
- Bassin de Tawang Chu692 km²
8 dept-equivalent regions (GADM L2)
- 84.5 km²52.3% of basin
- 48.2 km²29.8% of basin
- 8.9 km²5.5% of basin
- 8.6 km²5.3% of basin
- Tawang8.3 km²5.2% of basin
- 1.2 km²0.7% of basin
- 1.0 km²0.6% of basin
- 0.8 km²0.5% of basin
1 intersecting protected areas
Biological Corridor 9
IUCN VIBiological Corridor
81.51 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
189 distinct species · 361 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Drangme Chhu : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 33 interactions GloBI sur 5 types (connectance 5.5%, 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°
14,4°C
Annual rain
1 655mm
Moisture idx (CMI)
0,22
Runoff
518mm/an
PET
1 192mm
AET
934mm
Mean slope
26,4°
Water table
952cm
Forest
43%
Crops
4%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)