HydroBASINS lev08 watershed · #6080329670
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 : Arame, Itaipava do Grajaú, Lagoa Grande do Maranhão, Marajá do Sena
Sub-basin area
591,7km²
Upstream area
13 466km²
Discharge
197,3m³/s
Mean elev.
203m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Rio Grajaú944 km²
- Bassin · #6080333950739 km²
4 dept-equivalent regions (GADM L2)
- 246.7 km²41.9% of basin
- 218.5 km²37.1% of basin
- 99.7 km²16.9% of basin
- 24.2 km²4.1% of basin
1 intersecting protected areas
Geralda Toco Preto
IUCN Not ReportedIndigenous Area
2.90 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 distinct species · 6 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°
26,2°C
Annual rain
1 300mm
Moisture idx (CMI)
-0,27
Runoff
437mm/an
PET
1 786mm
AET
992mm
Mean slope
6,5°
Water table
321cm
Forest
53%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)