HydroBASINS lev08 watershed · #4081009750
Bassin de Sông Gâm
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 : Chiêm Hóa, Chợ Đồn, Yên Sơn
Sub-basin area
649,2km²
Upstream area
14 972,8km²
Discharge
404,39m³/s
Mean elev.
236m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 3 basins
- Bassin · #4081003490732 km²
- Bassin de Sông Gâm721 km²
- Bassin · #4080064610240 km²
3 dept-equivalent regions (GADM L2)
- 374.1 km²57.8% of basin
- 271.3 km²41.9% of basin
- 2.2 km²0.3% of basin
1 intersecting protected areas
Kim Binh
IUCN Not ReportedCultural and Historical Site
39.76 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
21 distinct species · 73 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 2 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 Sông Gâm : 2 espèces reliées par 1 interaction GloBI sur 1 type (connectance 100.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
22,4°C
Annual rain
1 704mm
Moisture idx (CMI)
0,22
Runoff
967mm/an
PET
1 337mm
AET
1 087mm
Mean slope
13,3°
Water table
508cm
Forest
0%
Crops
16%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)