Ontologia

HydroBASINS lev08 watershed · #1081606980

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

7% lakePfafstetter: 12797950

Sub-basin area

213,9km²

Upstream area

44 819,8km²

Discharge

71,13m³/s

Mean elev.

1 473m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Vaal River302 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

1 004 distinct species · 89 119 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

89 119 obs · 6 cellules
Obs. / cellule
≥ 46 750
46 750–46 749
22 475–46 749
11 867–22 474
< 11 867

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

Ecological tissue

Sample of 23 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 20 interactions GloBI sur 3 types (connectance 7.2%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
20
Connectance
0.072
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°

16,5°C

Annual rain

665mm

Moisture idx (CMI)

-0,56

Runoff

23mm/an

PET

1 506mm

AET

563mm

Mean slope

0,9°

Water table

331cm

Forest

0%

Crops

29%

Urban

55%

Protected

1%

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