Ontologia

HydroBASINS lev08 watershed · #5080226240

Bassin de South Alligator 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 : Roper Gulf, West Arnhem

Pfafstetter: 56254090

Sub-basin area

2 458,9km²

Upstream area

2 458,9km²

Discharge

32,85m³/s

Mean elev.

200m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de South Alligator River250 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Kakadu National Park

    IUCN Not Applicable

    World Heritage Site (natural or mixed)

    2449.70 km² overlap

  • Kakadu

    IUCN II

    National Park (Commonwealth)

    2449.70 km² overlap

  • Kakadu National Park

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    2449.70 km² overlap

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

Species present

2 559 distinct species · 63 541 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

63 541 obs · 65 cellules
Obs. / cellule
≥ 14 266
2 429–14 265
746–2 428
255–745
< 255

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

Ecological tissue

Sample of 39 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 South Alligator River : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 3 types (connectance 5.0%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
37
Connectance
0.050
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°

26,9°C

Annual rain

1 353mm

Moisture idx (CMI)

-0,30

Runoff

407mm/an

PET

1 945mm

AET

1 006mm

Mean slope

3,7°

Water table

281cm

Forest

48%

Crops

0%

Urban

0%

Protected

100%

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