HydroBASINS lev08 watershed · #4080859650
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 38 administrative regions : Balam, Bartsham, Chali, Chaskhar, Chimoong +33
Sub-basin area
1 569km²
Upstream area
10 487km²
Discharge
71,54m³/s
Mean elev.
1 821m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Gamri Chhu743 km²
- Bassin de STN1114 km²
38 dept-equivalent regions (GADM L2)
- 296.1 km²18.9% of basin
- 120.9 km²7.7% of basin
- 100.0 km²6.4% of basin
- 92.1 km²5.9% of basin
- 80.5 km²5.1% of basin
- 70.8 km²4.5% of basin
- 68.2 km²4.4% of basin
- 67.1 km²4.3% of basin
30 moreFull L2 list
- Nanong65.3 km² · 4.2%
- Zobel65.0 km² · 4.2%
- Dungmaed62.8 km² · 4.0%
- Kengkhar59.3 km² · 3.8%
- Chaskhar51.6 km² · 3.3%
- Narang49.9 km² · 3.2%
- Khar47.9 km² · 3.1%
- Chimoong44.3 km² · 2.8%
- Yangnyer43.2 km² · 2.8%
- Samkhar36.0 km² · 2.3%
- Chongshing31.0 km² · 2.0%
- Drametse28.6 km² · 1.8%
- Yurung28.2 km² · 1.8%
- Balam27.2 km² · 1.7%
- Jurmey24.4 km² · 1.6%
- Tsakaling1.2 km² · 0.1%
- Yangtse0.8 km² · 0.1%
- Drepong0.8 km² · 0.1%
- Shongphoog0.7 km² · 0.0%
- Dechhenling0.5 km² · 0.0%
- Mongar0.4 km² · 0.0%
- Jamkhar0.3 km² · 0.0%
- Kangpar0.3 km² · 0.0%
- Minjay0.2 km² · 0.0%
- Tongzhang0.2 km² · 0.0%
- Orong0.2 km² · 0.0%
- Tsenkhar0.2 km² · 0.0%
- Chokhorling0.1 km² · 0.0%
- Chali0.0 km² · 0.0%
- Bartsham0.0 km² · 0.0%
3 intersecting protected areas
Bumdeling Wildlife Sanctuary
IUCN IVWildlife Sanctuary
201.44 km² overlap
Kharungla top
IUCN Not ApplicableKey Biodiversity Area
12.07 km² overlap
Biological Corridor 7
IUCN VIBiological Corridor
0.21 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
943 distinct species · 11 012 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 : 15 espèces reliées par 27 interactions GloBI sur 3 types (connectance 11.7%, filtre Serrano α=0.2). 7 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°
15,6°C
Annual rain
2 071mm
Moisture idx (CMI)
0,36
Runoff
653mm/an
PET
1 197mm
AET
975mm
Mean slope
26,7°
Water table
939cm
Forest
37%
Crops
4%
Urban
0%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)