Ontologia

HydroBASINS lev08 watershed · #1080018320

Bassin de Rocha

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 : Namibe, Tombwa, Virei

Coastal basinPfafstetter: 13133000

Sub-basin area

2 393,4km²

Upstream area

2 393,4km²

Discharge

0,08m³/s

Mean elev.

196m

Administrative coverage

3 dept-equivalent regions (GADM L2)

  • Namibe
    Namibe · Angola
    1453.6 km²
    60.9% of basin
  • Tombwa
    Namibe · Angola
    530.5 km²
    22.2% of basin
  • Virei
    Namibe · Angola
    384.1 km²
    16.1% of basin

1 intersecting protected areas

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

Species present

522 distinct species · 1 782 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 782 obs · 57 cellules
Obs. / cellule
≥ 484
90–483
14–89
7–13
< 7

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

Ecological tissue

Sample of 20 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 Rocha : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 2 bulles famille, 12 interactions GloBI documentées sur 2 types (connectance 6.3%, filtre Serrano α=0.2). Les 2 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
20
Interactions affichées
12
Connectance
0.063
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°

20,7°C

Annual rain

84mm

Moisture idx (CMI)

-0,94

Runoff

11mm/an

PET

1 326mm

AET

73mm

Mean slope

1,2°

Water table

794cm

Forest

0%

Crops

0%

Urban

1%

Protected

80%

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