Ontologia

HydroBASINS lev08 watershed · #1081660000

Bassin de Sonderend 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 3 administrative regions : Cape Winelands, City of Cape Town, Overberg

17% lakePfafstetter: 12590064

Sub-basin area

2 231km²

Upstream area

2 231km²

Discharge

9,81m³/s

Mean elev.

411m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Breede River389 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

12 intersecting protected areas

3 more protected areas

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

Species present

4 570 distinct species · 159 374 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

159 374 obs · 66 cellules
Obs. / cellule
≥ 22 666
5 725–22 665
2 450–5 724
1 013–2 449
< 1 013

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

Ecological tissue

Sample of 35 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 Sonderend River : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 4 types (connectance 6.2%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
37
Connectance
0.062
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°

15,7°C

Annual rain

624mm

Moisture idx (CMI)

-0,49

Runoff

171mm/an

PET

1 257mm

AET

512mm

Mean slope

9,1°

Water table

621cm

Forest

34%

Crops

44%

Urban

1%

Protected

23%

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