Ontologia

HydroBASINS lev08 watershed · #1081656270

Bassin de Sandrivier

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 : Central Karoo, Eden

Pfafstetter: 12580440

Sub-basin area

1 146,3km²

Upstream area

1 146,3km²

Discharge

0,55m³/s

Mean elev.

861m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Gamka River914 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

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

Species present

1 849 distinct species · 21 711 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

21 711 obs · 34 cellules
Obs. / cellule
≥ 6 649
1 177–6 648
369–1 176
127–368
< 127

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

Ecological tissue

Sample of 23 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 Sandrivier : 18 espèces reliées par 19 interactions GloBI sur 4 types (connectance 7.5%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
23
Interactions affichées
19
Connectance
0.075
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°

14,9°C

Annual rain

305mm

Moisture idx (CMI)

-0,78

Runoff

16mm/an

PET

1 397mm

AET

260mm

Mean slope

6,3°

Water table

819cm

Forest

0%

Crops

2%

Urban

1%

Protected

0%

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