HydroBASINS lev08 watershed · #6080013890
Bassin de Rio Alcântara
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 15 administrative regions : Araruama, Armação dos Búzios, Arraial do Cabo, Cabo Frio, Casimiro de Abreu +10
Sub-basin area
2 320,6km²
Upstream area
2 320,6km²
Discharge
0,54m³/s
Mean elev.
42m
Administrative coverage
15 dept-equivalent regions (GADM L2)
- 360.8 km²15.6% of basin
- 351.4 km²15.2% of basin
- São Pedro da AldeiaRio de Janeiro · Brazil326.2 km²14.1% of basin
- 290.0 km²12.5% of basin
- 281.0 km²12.1% of basin
- São GonçaloRio de Janeiro · Brazil179.6 km²7.8% of basin
- Arraial do CaboRio de Janeiro · Brazil152.1 km²6.6% of basin
- 126.1 km²5.4% of basin
7 moreFull L2 list
- Armação dos Búzios70.9 km² · 3.1%
- Iguaba Grande51.0 km² · 2.2%
- Itaboraí13.2 km² · 0.6%
- Guapimirim8.7 km² · 0.4%
- Rio Bonito6.2 km² · 0.3%
- Tanguá1.3 km² · 0.1%
- Casimiro de Abreu0.0 km² · 0.0%
30 intersecting protected areas
Park
98.17 km² overlap
Environmental Protection Area
98.10 km² overlap
Environmental Protection Area
91.24 km² overlap
Wildlife Refuge
88.13 km² overlap
Environmental Protection Area
79.26 km² overlap
Environmental Protection Area
59.60 km² overlap
Environmental Protection Area
43.56 km² overlap
Environmental Protection Area
41.25 km² overlap
Park
31.13 km² overlap
21 more protected areassorted by overlap area
Environmental Protection Area
30.45 km² overlap
Extractive Reserve
27.81 km² overlap
Environmental Protection Area
26.52 km² overlap
Ecological Station
14.26 km² overlap
Environmental Protection Area
13.64 km² overlap
Environmental Protection Area
9.68 km² overlap
Park
8.95 km² overlap
Extractive Reserve
6.23 km² overlap
Environmental Protection Area
5.26 km² overlap
Park
4.74 km² overlap
Natural Heritage Private Reserve
2.48 km² overlap
Natural Monument
2.27 km² overlap
Park
2.21 km² overlap
Environmental Protection Area
2.19 km² overlap
Environmental Protection Area
1.92 km² overlap
Environmental Protection Area
1.90 km² overlap
Natural Heritage Private Reserve
1.39 km² overlap
Biological Reserve
1.37 km² overlap
Environmental Protection Area
1.25 km² overlap
Natural Monument
1.20 km² overlap
Park
1.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 245 distinct species · 202 075 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Rio Alcântara : 23 espèces reliées par 31 interactions GloBI sur 2 types (connectance 7.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
23,0°C
Annual rain
1 057mm
Moisture idx (CMI)
-0,18
Runoff
638mm/an
PET
1 289mm
AET
897mm
Mean slope
3,8°
Water table
216cm
Forest
16%
Crops
6%
Urban
28%
Protected
13%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)