Ontologia

HydroBASINS lev08 watershed · #1081658860

Bassin de Gamka 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 2 administrative regions : Central Karoo, Eden

Pfafstetter: 12580410

Sub-basin area

1 385km²

Upstream area

18 506km²

Discharge

9,44m³/s

Mean elev.

741m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Gourits River629 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

13 intersecting protected areas

4 more protected areas

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

Species present

2 770 distinct species · 36 644 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

36 644 obs · 39 cellules
Obs. / cellule
≥ 5 080
3 008–5 079
1 095–3 007
517–1 094
< 517

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

Ecological tissue

Sample of 36 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 Gamka River : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 34 interactions GloBI sur 4 types (connectance 5.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
34
Connectance
0.051
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°

14,7°C

Annual rain

299mm

Moisture idx (CMI)

-0,78

Runoff

19mm/an

PET

1 384mm

AET

255mm

Mean slope

14,2°

Water table

978cm

Forest

14%

Crops

5%

Urban

0%

Protected

25%

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