HydroBASINS lev08 watershed · #6080319450
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 7 administrative regions : Arame, Itaipava do Grajaú, Lago da Pedra, Lagoa Grande do Maranhão, Marajá do Sena +2
Sub-basin area
1 505,6km²
Upstream area
15 825,7km²
Discharge
229,41m³/s
Mean elev.
197m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #6080329530854 km²
- Bassin de Rio Grajaú592 km²
7 dept-equivalent regions (GADM L2)
- 681.3 km²45.4% of basin
- 335.3 km²22.4% of basin
- 296.9 km²19.8% of basin
- 166.5 km²11.1% of basin
- 15.6 km²1.0% of basin
- 2.6 km²0.2% of basin
- 0.9 km²0.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
18 distinct species · 20 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 2 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 : 2 espèces reliées par 1 interaction GloBI sur 1 type (connectance 100.0%, 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°
26,3°C
Annual rain
1 382mm
Moisture idx (CMI)
-0,22
Runoff
469mm/an
PET
1 772mm
AET
999mm
Mean slope
6,1°
Water table
273cm
Forest
19%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)