HydroBASINS lev08 watershed · #6080312630
Bassin de Rio Grajaú
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 5 administrative regions : Brejo de Areia, Lago da Pedra, Marajá do Sena, Paulo Ramos, Vitorino Freire
Sub-basin area
974,8km²
Upstream area
17 795,9km²
Discharge
262m³/s
Mean elev.
87m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Rio Grajaú1506 km²
- Bassin de Rio Grajaú996 km²
5 dept-equivalent regions (GADM L2)
- 555.5 km²57.2% of basin
- 332.4 km²34.2% of basin
- 67.3 km²6.9% of basin
- 10.1 km²1.0% of basin
- 5.2 km²0.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
49 distinct species · 72 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 Grajaú : 21 espèces reliées par 17 interactions GloBI sur 2 types (connectance 8.1%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
27,0°C
Annual rain
1 485mm
Moisture idx (CMI)
-0,16
Runoff
588mm/an
PET
1 778mm
AET
1 026mm
Mean slope
3,9°
Water table
104cm
Forest
3%
Crops
14%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)