HydroBASINS lev08 watershed · #4080015170
Bassin de Sông Hoàng Mai
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 6 administrative regions : Hoàng Mai, Nghĩa Đàn, Như Thanh, Quỳnh Lưu, Thái Hoà +1
Sub-basin area
413,2km²
Upstream area
413,4km²
Discharge
6,6m³/s
Mean elev.
65m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 213.1 km²51.7% of basin
- 131.5 km²31.9% of basin
- 52.5 km²12.7% of basin
- 10.8 km²2.6% of basin
- 2.4 km²0.6% of basin
- 1.6 km²0.4% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
34 distinct species · 40 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 Hoàng Mai : 12 espèces reliées par 9 interactions GloBI sur 2 types (connectance 11.5%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
24,1°C
Annual rain
1 418mm
Moisture idx (CMI)
0,05
Runoff
920mm/an
PET
1 344mm
AET
999mm
Mean slope
4,1°
Water table
174cm
Forest
1%
Crops
17%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)