HydroBASINS lev08 watershed · #6080300690
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 : Altamira do Maranhão, Olho d'Água das Cunhãs, Pio XII, Satubinha, Vitorino Freire
Sub-basin area
583,1km²
Upstream area
19 583,4km²
Discharge
294,59m³/s
Mean elev.
42m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Rio Grajaú499 km²
- Bassin de Rio Grajaú166 km²
5 dept-equivalent regions (GADM L2)
- 359.4 km²61.9% of basin
- 149.1 km²25.7% of basin
- 51.0 km²8.8% of basin
- 21.0 km²3.6% of basin
- 0.1 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 distinct species · 2 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
27,3°C
Annual rain
1 599mm
Moisture idx (CMI)
-0,10
Runoff
647mm/an
PET
1 770mm
AET
1 079mm
Mean slope
1,2°
Water table
32cm
Forest
3%
Crops
11%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)