Ontologia

HydroBASINS lev08 watershed · #1081647090

Bassin de Varsrivier

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 : Namakwa, West Coast

Pfafstetter: 12604220

Sub-basin area

1 025,6km²

Upstream area

1 025,6km²

Discharge

0,94m³/s

Mean elev.

251m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Holrivier252 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

1 264 distinct species · 8 289 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 289 obs · 28 cellules
Obs. / cellule
≥ 2 327
789–2 326
232–788
122–231
< 122

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

Ecological tissue

Sample of 42 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 Varsrivier : 33 espèces reliées par 39 interactions GloBI sur 4 types (connectance 4.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
39
Connectance
0.045
Patrimoniales
0
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°

19,2°C

Annual rain

180mm

Moisture idx (CMI)

-0,89

Runoff

24mm/an

PET

1 656mm

AET

151mm

Mean slope

3,2°

Water table

584cm

Forest

0%

Crops

2%

Urban

0%

Protected

1%

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