HydroBASINS lev08 watershed · #4080015260
Bassin de Sông Lam
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 7 administrative regions : Can Lộc, Hưng Nguyên, Hồng Lĩnh, Nghi Lộc, Nghi Xuân +2
Sub-basin area
322,4km²
Upstream area
27 327,9km²
Discharge
648,75m³/s
Mean elev.
24m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Sông Lam755 km²
- Bassin de Sông La86 km²
7 dept-equivalent regions (GADM L2)
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
112 distinct species · 235 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Lam : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 28 interactions GloBI sur 4 types (connectance 5.6%, filtre Serrano α=0.2). 5 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°
24,6°C
Annual rain
1 737mm
Moisture idx (CMI)
0,24
Runoff
1 229mm/an
PET
1 319mm
AET
1 083mm
Mean slope
2,0°
Water table
91cm
Forest
0%
Crops
57%
Urban
56%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)