HydroBASINS lev08 watershed · #6080293820
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 10 administrative regions : Arari, Bacabal, Bom Lugar, Conceição do Lago-Açu, Lago Verde +5
Sub-basin area
2 086,9km²
Upstream area
2 086,9km²
Discharge
40,79m³/s
Mean elev.
24m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
10 dept-equivalent regions (GADM L2)
- 558.6 km²26.9% of basin
- 514.5 km²24.8% of basin
- 377.3 km²18.2% of basin
- 151.5 km²7.3% of basin
- 140.7 km²6.8% of basin
- 124.8 km²6.0% of basin
- 109.0 km²5.2% of basin
- 72.5 km²3.5% of basin
2 moreFull L2 list
- Paulo Ramos24.4 km² · 1.2%
- Arari4.4 km² · 0.2%
2 intersecting protected areas
Environmental Protection Area
974.98 km² overlap
Wetland of International Importance (Ramsar Site)
973.55 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
165 distinct species · 431 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 : 35 espèces reliées par 53 interactions GloBI sur 5 types (connectance 5.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
27,4°C
Annual rain
1 635mm
Moisture idx (CMI)
-0,07
Runoff
619mm/an
PET
1 766mm
AET
1 087mm
Mean slope
0,8°
Water table
23cm
Forest
14%
Crops
2%
Urban
1%
Protected
47%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)