HydroBASINS lev08 watershed · #6080009250
Bassin de Rio Mearim
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 6 administrative regions : Arari, Cajari, Igarapé do Meio, Miranda do Norte, Monção +1
Sub-basin area
1 046,9km²
Upstream area
55 843,1km²
Discharge
605,31m³/s
Mean elev.
13m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Igarapé do Ipixuna593 km²
- Bassin de Rio Mearim34 km²
6 dept-equivalent regions (GADM L2)
- 507.4 km²48.7% of basin
- 385.1 km²36.9% of basin
- 76.6 km²7.3% of basin
- 47.2 km²4.5% of basin
- 26.0 km²2.5% of basin
- 0.1 km²0.0% of basin
2 intersecting protected areas
Wetland of International Importance (Ramsar Site)
915.61 km² overlap
Environmental Protection Area
915.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
554 distinct species · 6 140 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Mearim : 18 espèces reliées par 27 interactions GloBI sur 3 types (connectance 7.7%, 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 656mm
Moisture idx (CMI)
-0,04
Runoff
741mm/an
PET
1 729mm
AET
1 115mm
Mean slope
0,4°
Water table
12cm
Forest
25%
Crops
8%
Urban
2%
Protected
88%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)