HydroBASINS lev08 watershed · #6080308900
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 4 administrative regions : Altamira do Maranhão, Brejo de Areia, Santa Luzia, Vitorino Freire
Sub-basin area
498,7km²
Upstream area
498,8km²
Discharge
8,53m³/s
Mean elev.
75m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 333.1 km²67.1% of basin
- 143.1 km²28.8% of basin
- 20.0 km²4.0% of basin
- 0.2 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 distinct species · 3 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°
27,1°C
Annual rain
1 509mm
Moisture idx (CMI)
-0,15
Runoff
542mm/an
PET
1 770mm
AET
1 061mm
Mean slope
3,0°
Water table
80cm
Forest
6%
Crops
19%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)