Ontologia

HydroBASINS lev08 watershed · #1081435710

Bassin de Hiquia (Carvalhão)

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 : Tombwa, Virei

Pfafstetter: 13132020

Sub-basin area

1 958,6km²

Upstream area

1 958,6km²

Discharge

1,79m³/s

Mean elev.

401m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Curoca213 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

  • Virei
    Namibe · Angola
    1544.3 km²
    79.1% of basin
  • Tombwa
    Namibe · Angola
    407.5 km²
    20.9% of basin

2 intersecting protected areas

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

Species present

211 distinct species · 323 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

323 obs · 20 cellules
Obs. / cellule
≥ 96
67–95
10–66
5–9
< 5

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

Ecological tissue

Sample of 45 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 Hiquia (Carvalhão) : 36 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 46 interactions GloBI sur 4 types (connectance 4.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
45
Interactions affichées
46
Connectance
0.046
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°

21,1°C

Annual rain

147mm

Moisture idx (CMI)

-0,90

Runoff

27mm/an

PET

1 416mm

AET

126mm

Mean slope

2,2°

Water table

552cm

Forest

0%

Crops

0%

Urban

0%

Protected

76%

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