HydroBASINS lev08 watershed · #6080876580
Bassin de Arroio Bretanha
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 4 administrative regions : Arroio Grande, Jaguarão, Lagoa Mirim, Santa Vitória do Palmar
Sub-basin area
1 988,3km²
Upstream area
43 950,8km²
Discharge
849,76m³/s
Mean elev.
10m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Arroio do Marmeleiro1184 km²
- Bassin de Sanga do Meio586 km²
4 dept-equivalent regions (GADM L2)
- 1006.7 km²50.7% of basin
- 413.2 km²20.8% of basin
- 354.8 km²17.9% of basin
- 212.4 km²10.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
160 distinct species · 558 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Arroio Bretanha : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 3 types (connectance 6.4%, 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°
17,6°C
Annual rain
1 227mm
Moisture idx (CMI)
0,01
Runoff
654mm/an
PET
1 216mm
AET
940mm
Mean slope
0,2°
Water table
14cm
Forest
11%
Crops
15%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)