Ontologia

HydroBASINS lev08 watershed · #1081596320

Bassin de Wilgerivier

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 : City of Tshwane, Nkangala

Pfafstetter: 12440942

Sub-basin area

302,3km²

Upstream area

302,3km²

Discharge

0,28m³/s

Mean elev.

1 433m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Wilgerivier406 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

689 distinct species · 23 547 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

23 547 obs · 7 cellules
Obs. / cellule
≥ 7 742
7 742–7 741
4 619–7 741
3 201–4 618
< 3 201

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

Ecological tissue

Sample of 26 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 Wilgerivier : 24 espèces reliées par 19 interactions GloBI sur 3 types (connectance 5.8%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
26
Interactions affichées
19
Connectance
0.059
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°

16,6°C

Annual rain

687mm

Moisture idx (CMI)

-0,55

Runoff

30mm/an

PET

1 535mm

AET

583mm

Mean slope

1,7°

Water table

517cm

Forest

1%

Crops

24%

Urban

5%

Protected

2%

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