Ontologia

HydroBASINS lev08 watershed · #1081653450

Bassin de Riet

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 : Cape Winelands, Namakwa

2% lakePfafstetter: 12604805

Sub-basin area

666,5km²

Upstream area

1 554,6km²

Discharge

7,04m³/s

Mean elev.

1 066m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Groot286 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

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

Species present

1 430 distinct species · 15 281 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

15 281 obs · 21 cellules
Obs. / cellule
≥ 5 310
1 448–5 309
608–1 447
370–607
< 370

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

Ecological tissue

Sample of 40 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 Riet : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 3 types (connectance 4.7%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
37
Connectance
0.047
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°

13,6°C

Annual rain

306mm

Moisture idx (CMI)

-0,77

Runoff

98mm/an

PET

1 361mm

AET

261mm

Mean slope

8,6°

Water table

662cm

Forest

0%

Crops

6%

Urban

0%

Protected

15%

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