Ontologia

HydroBASINS lev08 watershed · #1081658560

Bassin de Olifantsrivier

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 : Cacadu, Central Karoo, Eden

2% lakePfafstetter: 12580700

Sub-basin area

2 417km²

Upstream area

6 574,2km²

Discharge

7,41m³/s

Mean elev.

838m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Olifantsrivier2594 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

5 intersecting protected areas

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

Species present

2 636 distinct species · 44 305 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

44 305 obs · 67 cellules
Obs. / cellule
≥ 8 012
1 586–8 011
552–1 585
318–551
< 318

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

Ecological tissue

Sample of 37 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 Olifantsrivier : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 3 types (connectance 4.8%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
32
Connectance
0.048
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°

14,8°C

Annual rain

476mm

Moisture idx (CMI)

-0,63

Runoff

48mm/an

PET

1 304mm

AET

406mm

Mean slope

11,3°

Water table

631cm

Forest

15%

Crops

6%

Urban

1%

Protected

18%

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