Ontologia

HydroBASINS lev08 watershed · #4081067490

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 9 administrative regions across 2 countries : Hưng Nguyên, Hương Sơn, Khamkheuth, Nam Đàn, Nghi Lộc +4

6% lakePfafstetter: 44104031

Sub-basin area

754,6km²

Upstream area

23 712,9km²

Discharge

501,81m³/s

Mean elev.

77m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Sông Lam322 km²

▲ Receives from 2 basins

9 dept-equivalent regions (GADM L2)

1 more

2 intersecting protected areas

  • Western Nghe An

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    373.38 km² overlap

  • Nui Chung

    IUCN Not Reported

    Cultural and Historical Site

    2.02 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

27 distinct species · 42 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

42 obs · 9 cellules
Obs. / cellule
≥ 13
13–12
6–12
4–5
< 4

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 4 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Sông Lam : 4 espèces reliées par 2 interactions GloBI sur 2 types (connectance 33.3%, filtre Serrano α=0.2).

Espèces affichées
4
Interactions affichées
2
Connectance
0.333
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

24,4°C

Annual rain

1 591mm

Moisture idx (CMI)

0,14

Runoff

1 110mm/an

PET

1 363mm

AET

1 071mm

Mean slope

5,2°

Water table

208cm

Forest

11%

Crops

43%

Urban

24%

Protected

1%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)