Ontologia

HydroBASINS lev08 watershed · #1081606340

Bassin de Vaal River

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 2 administrative regions : Fezile Dabi, Sedibeng

139% lakePfafstetter: 12797990

Sub-basin area

522,7km²

Upstream area

38 799,3km²

Discharge

64,21m³/s

Mean elev.

1 493m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Vaal River4 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

6 intersecting protected areas

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

Species present

621 distinct species · 31 171 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

31 171 obs · 12 cellules
Obs. / cellule
≥ 13 212
6 913–13 211
2 068–6 912
1 182–2 067
< 1 182

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

Ecological tissue

Sample of 24 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 Vaal River : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 21 interactions GloBI sur 3 types (connectance 7.0%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
25
Interactions affichées
21
Connectance
0.070
Patrimoniales
1
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°

16,1°C

Annual rain

669mm

Moisture idx (CMI)

-0,56

Runoff

20mm/an

PET

1 509mm

AET

565mm

Mean slope

1,4°

Water table

307cm

Forest

0%

Crops

48%

Urban

1%

Protected

18%

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