Ontologia

HydroBASINS lev08 watershed · #1081652130

Bassin de Tankwa

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 : Cape Winelands, Namakwa

15% lakePfafstetter: 12604603

Sub-basin area

199,7km²

Upstream area

3 476,3km²

Discharge

1,44m³/s

Mean elev.

410m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Tankwa725 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

373 distinct species · 8 436 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 436 obs · 4 cellules
Obs. / cellule
≥ 6 114
6 114–6 113
1 472–6 113
1 472–1 471
< 1 472

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

Ecological tissue

Sample of 28 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 Tankwa : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 26 interactions GloBI sur 2 types (connectance 6.9%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
28
Interactions affichées
26
Connectance
0.069
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°

18,8°C

Annual rain

128mm

Moisture idx (CMI)

-0,92

Runoff

22mm/an

PET

1 689mm

AET

106mm

Mean slope

1,3°

Water table

458cm

Forest

0%

Crops

0%

Urban

0%

Protected

83%

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