Ontologia

HydroBASINS lev08 watershed · #1081651660

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

Pfafstetter: 12604601

Sub-basin area

724,6km²

Upstream area

6 412,2km²

Discharge

3,94m³/s

Mean elev.

360m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Doringrivier973 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

456 distinct species · 4 097 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 097 obs · 21 cellules
Obs. / cellule
≥ 1 445
490–1 444
128–489
84–127
< 84

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

Ecological tissue

Sample of 40 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 : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 5.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
44
Connectance
0.056
Patrimoniales
2
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°

18,9°C

Annual rain

160mm

Moisture idx (CMI)

-0,90

Runoff

29mm/an

PET

1 689mm

AET

134mm

Mean slope

1,2°

Water table

382cm

Forest

0%

Crops

0%

Urban

0%

Protected

33%

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