HydroBASINS lev08 watershed · #6080815310
Bassin de Rio da Várzea
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 25 administrative regions : Ametista do Sul, Boa Vista das Missões, Cerro Grande, Constantina, Cristal do Sul +20
Sub-basin area
1 775,5km²
Upstream area
4 805,2km²
Discharge
162,55m³/s
Mean elev.
446m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Arroio dos Baios458 km²
- Bassin de Rio Sarandi4 km²
25 dept-equivalent regions (GADM L2)
- 245.6 km²13.9% of basin
- 201.3 km²11.4% of basin
- 142.1 km²8.0% of basin
- 83.6 km²4.7% of basin
- 83.3 km²4.7% of basin
- 78.0 km²4.4% of basin
- 77.9 km²4.4% of basin
- 75.4 km²4.3% of basin
17 moreFull L2 list
- Cerro Grande73.4 km² · 4.1%
- Engenho Velho71.2 km² · 4.0%
- São José das Missões70.4 km² · 4.0%
- Novo Xingu69.2 km² · 3.9%
- São Pedro das Missões68.8 km² · 3.9%
- Lajeado do Bugre67.9 km² · 3.8%
- Ronda Alta62.4 km² · 3.5%
- Nonoai58.7 km² · 3.3%
- Pinhal45.0 km² · 2.5%
- Ametista do Sul44.7 km² · 2.5%
- Cristal do Sul39.2 km² · 2.2%
- Gramado dos Loureiros34.9 km² · 2.0%
- Rondinha27.4 km² · 1.5%
- Palmeira das Missões24.4 km² · 1.4%
- Boa Vista das Missões15.6 km² · 0.9%
- Planalto12.2 km² · 0.7%
- Sarandi0.0 km² · 0.0%
2 intersecting protected areas
Nonoai/Rio da Várzea
IUCN Not ReportedIndigenous Area
109.67 km² overlap
Serrinha
IUCN Not ReportedIndigenous Area
87.50 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
201 distinct species · 375 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 da Várzea : 31 espèces reliées par 45 interactions GloBI sur 3 types (connectance 5.8%, filtre Serrano α=0.2). 9 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°
19,7°C
Annual rain
1 820mm
Moisture idx (CMI)
0,22
Runoff
1 000mm/an
PET
1 427mm
AET
1 313mm
Mean slope
7,3°
Water table
290cm
Forest
41%
Crops
59%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)