Rivière· 157 segments
Rio Grajaú
Crosses 15 administrative regions : Altamira do Maranhão, Arame, Bela Vista do Maranhão, Conceição do Lago-Açu, Grajaú +10
Total length
450km
Max discharge
325,7m³/s
Max Strahler
5
Segments matched
157
River geography15 admin regions · 0 communes
15 administrative regions crossed (GADM L2)
- GrajaúMaranhão · Brazil180.2 kmin this dpt
- Vitorino FreireMaranhão · Brazil85.6 kmin this dpt
- ArameMaranhão · Brazil83.4 kmin this dpt
- Itaipava do GrajaúMaranhão · Brazil75.6 kmin this dpt
- Paulo RamosMaranhão · Brazil53.8 kmin this dpt
- Marajá do SenaMaranhão · Brazil45.8 kmin this dpt
- Conceição do Lago-AçuMaranhão · Brazil21.7 kmin this dpt
- Vitória do MearimMaranhão · Brazil15.6 kmin this dpt
- Igarapé do MeioMaranhão · Brazil14.3 kmin this dpt
- Pio XIIMaranhão · Brazil14.2 kmin this dpt
- Bela Vista do MaranhãoMaranhão · Brazil9.5 kmin this dpt
- SatubinhaMaranhão · Brazil6.2 kmin this dpt
- Altamira do MaranhãoMaranhão · Brazil4.8 kmin this dpt
- Lago da PedraMaranhão · Brazil3.0 kmin this dpt
- Lagoa Grande do MaranhãoMaranhão · Brazil1.0 kmin this dpt
4 intersecting protected areas
Environmental Protection Area
Wetland of International Importance (Ramsar Site)
Geralda Toco Preto
IUCN Not ReportedIndigenous Area
Urucu/Juruá
IUCN Not ReportedIndigenous Area
1 page = 1 named river (aggregation of 157 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
0 distinct species · 0 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydrology (HydroRIVERS v10)
Total length
450km
Max discharge
325,7m³/s
Max Strahler
5
Segments matched
157
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.