Ontologia

HydroBASINS lev08 watershed · #1081657700

Bassin de Sundays 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 1 administrative regions : Cacadu

16% lakePfafstetter: 12558017

Sub-basin area

854km²

Upstream area

17 628,3km²

Discharge

10m³/s

Mean elev.

451m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Bezuidenhouts574 km²

▲ Receives from 2 basins

1 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

935 distinct species · 7 682 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

7 682 obs · 23 cellules
Obs. / cellule
≥ 3 170
627–3 169
309–626
101–308
< 101

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

Ecological tissue

Sample of 41 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 Sundays River : 38 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 3 types (connectance 4.3%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
35
Connectance
0.043
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°

17,7°C

Annual rain

351mm

Moisture idx (CMI)

-0,76

Runoff

34mm/an

PET

1 479mm

AET

298mm

Mean slope

11,6°

Water table

953cm

Forest

57%

Crops

7%

Urban

0%

Protected

42%

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