Ontologia

HydroBASINS lev08 watershed · #1081426490

Bassin de Saiona

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 : Humpata, Namibe, Virei

Pfafstetter: 13134020

Sub-basin area

1 718,1km²

Upstream area

1 718,1km²

Discharge

3,62m³/s

Mean elev.

568m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Bero567 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

  • Virei
    Namibe · Angola
    1578.2 km²
    92.2% of basin
  • Namibe
    Namibe · Angola
    70.8 km²
    4.1% of basin
  • Humpata
    Huíla · Angola
    63.0 km²
    3.7% of basin

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

Species present

21 distinct species · 34 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

34 obs · 11 cellules
Obs. / cellule
≥ 16
5–15
2–4
1–1
< 1

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

Ecological tissue

Sample of 8 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 Saiona : 8 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 6 interactions GloBI sur 1 type (connectance 21.4%, filtre Serrano α=0.2).

Espèces affichées
8
Interactions affichées
6
Connectance
0.214
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°

22,5°C

Annual rain

329mm

Moisture idx (CMI)

-0,79

Runoff

69mm/an

PET

1 560mm

AET

278mm

Mean slope

4,6°

Water table

430cm

Forest

6%

Crops

3%

Urban

0%

Protected

0%

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